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annotate Modules/_threadmodule.c @ 65105:8bcbdd6730a7

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#10034: import readline in longer example.
author Georg Brandl <georg@python.org>
date Wed, 06 Oct 2010 05:08:32 +0000
parents 0265d5f7bd07
children b750c45a772c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 /* Thread module */
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3 /* Interface to Sjoerd's portable C thread library */
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4
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5 #include "Python.h"
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6 #include "structmember.h" /* offsetof */
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7
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8 #ifndef WITH_THREAD
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9 #error "Error! The rest of Python is not compiled with thread support."
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10 #error "Rerun configure, adding a --with-threads option."
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11 #error "Then run `make clean' followed by `make'."
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12 #endif
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13
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14 #include "pythread.h"
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15
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16 static PyObject *ThreadError;
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17 static long nb_threads = 0;
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18 static PyObject *str_dict;
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19
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20 /* Lock objects */
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21
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22 typedef struct {
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23 PyObject_HEAD
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24 PyThread_type_lock lock_lock;
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25 PyObject *in_weakreflist;
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26 } lockobject;
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27
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28 static void
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29 lock_dealloc(lockobject *self)
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30 {
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31 if (self->in_weakreflist != NULL)
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32 PyObject_ClearWeakRefs((PyObject *) self);
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33 if (self->lock_lock != NULL) {
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34 /* Unlock the lock so it's safe to free it */
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35 PyThread_acquire_lock(self->lock_lock, 0);
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36 PyThread_release_lock(self->lock_lock);
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37
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38 PyThread_free_lock(self->lock_lock);
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39 }
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40 PyObject_Del(self);
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41 }
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42
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43 static PyObject *
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44 lock_PyThread_acquire_lock(lockobject *self, PyObject *args, PyObject *kwds)
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45 {
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46 char *kwlist[] = {"blocking", "timeout", NULL};
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47 int blocking = 1;
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48 double timeout = -1;
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49 PY_TIMEOUT_T microseconds;
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50 int r;
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51
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52 if (!PyArg_ParseTupleAndKeywords(args, kwds, "|id:acquire", kwlist,
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53 &blocking, &timeout))
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54 return NULL;
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55
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56 if (!blocking && timeout != -1) {
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57 PyErr_SetString(PyExc_ValueError, "can't specify a timeout "
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58 "for a non-blocking call");
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59 return NULL;
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60 }
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61 if (timeout < 0 && timeout != -1) {
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62 PyErr_SetString(PyExc_ValueError, "timeout value must be "
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63 "strictly positive");
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64 return NULL;
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65 }
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66 if (!blocking)
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67 microseconds = 0;
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68 else if (timeout == -1)
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69 microseconds = -1;
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70 else {
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71 timeout *= 1e6;
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72 if (timeout >= (double) PY_TIMEOUT_MAX) {
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73 PyErr_SetString(PyExc_OverflowError,
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74 "timeout value is too large");
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75 return NULL;
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76 }
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77 microseconds = (PY_TIMEOUT_T) timeout;
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78 }
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79
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80 Py_BEGIN_ALLOW_THREADS
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81 r = PyThread_acquire_lock_timed(self->lock_lock, microseconds);
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82 Py_END_ALLOW_THREADS
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83
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84 return PyBool_FromLong(r);
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85 }
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86
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87 PyDoc_STRVAR(acquire_doc,
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88 "acquire([wait]) -> None or bool\n\
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89 (acquire_lock() is an obsolete synonym)\n\
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90 \n\
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91 Lock the lock. Without argument, this blocks if the lock is already\n\
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92 locked (even by the same thread), waiting for another thread to release\n\
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93 the lock, and return None once the lock is acquired.\n\
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94 With an argument, this will only block if the argument is true,\n\
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95 and the return value reflects whether the lock is acquired.\n\
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96 The blocking operation is not interruptible.");
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97
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98 static PyObject *
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99 lock_PyThread_release_lock(lockobject *self)
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100 {
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101 /* Sanity check: the lock must be locked */
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102 if (PyThread_acquire_lock(self->lock_lock, 0)) {
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103 PyThread_release_lock(self->lock_lock);
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104 PyErr_SetString(ThreadError, "release unlocked lock");
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105 return NULL;
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106 }
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107
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108 PyThread_release_lock(self->lock_lock);
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109 Py_INCREF(Py_None);
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110 return Py_None;
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111 }
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112
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113 PyDoc_STRVAR(release_doc,
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114 "release()\n\
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115 (release_lock() is an obsolete synonym)\n\
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116 \n\
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117 Release the lock, allowing another thread that is blocked waiting for\n\
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118 the lock to acquire the lock. The lock must be in the locked state,\n\
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119 but it needn't be locked by the same thread that unlocks it.");
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120
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121 static PyObject *
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122 lock_locked_lock(lockobject *self)
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123 {
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124 if (PyThread_acquire_lock(self->lock_lock, 0)) {
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125 PyThread_release_lock(self->lock_lock);
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126 return PyBool_FromLong(0L);
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127 }
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128 return PyBool_FromLong(1L);
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129 }
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130
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131 PyDoc_STRVAR(locked_doc,
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132 "locked() -> bool\n\
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133 (locked_lock() is an obsolete synonym)\n\
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134 \n\
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135 Return whether the lock is in the locked state.");
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136
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137 static PyMethodDef lock_methods[] = {
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138 {"acquire_lock", (PyCFunction)lock_PyThread_acquire_lock,
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139 METH_VARARGS | METH_KEYWORDS, acquire_doc},
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140 {"acquire", (PyCFunction)lock_PyThread_acquire_lock,
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141 METH_VARARGS | METH_KEYWORDS, acquire_doc},
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142 {"release_lock", (PyCFunction)lock_PyThread_release_lock,
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143 METH_NOARGS, release_doc},
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144 {"release", (PyCFunction)lock_PyThread_release_lock,
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145 METH_NOARGS, release_doc},
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146 {"locked_lock", (PyCFunction)lock_locked_lock,
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147 METH_NOARGS, locked_doc},
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148 {"locked", (PyCFunction)lock_locked_lock,
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149 METH_NOARGS, locked_doc},
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150 {"__enter__", (PyCFunction)lock_PyThread_acquire_lock,
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151 METH_VARARGS | METH_KEYWORDS, acquire_doc},
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152 {"__exit__", (PyCFunction)lock_PyThread_release_lock,
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153 METH_VARARGS, release_doc},
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154 {NULL, NULL} /* sentinel */
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155 };
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156
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157 static PyTypeObject Locktype = {
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158 PyVarObject_HEAD_INIT(&PyType_Type, 0)
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159 "_thread.lock", /*tp_name*/
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160 sizeof(lockobject), /*tp_size*/
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161 0, /*tp_itemsize*/
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162 /* methods */
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163 (destructor)lock_dealloc, /*tp_dealloc*/
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164 0, /*tp_print*/
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165 0, /*tp_getattr*/
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166 0, /*tp_setattr*/
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167 0, /*tp_reserved*/
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168 0, /*tp_repr*/
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169 0, /*tp_as_number*/
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170 0, /*tp_as_sequence*/
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171 0, /*tp_as_mapping*/
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172 0, /*tp_hash*/
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173 0, /*tp_call*/
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174 0, /*tp_str*/
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175 0, /*tp_getattro*/
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176 0, /*tp_setattro*/
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177 0, /*tp_as_buffer*/
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178 Py_TPFLAGS_DEFAULT, /*tp_flags*/
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179 0, /*tp_doc*/
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180 0, /*tp_traverse*/
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181 0, /*tp_clear*/
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182 0, /*tp_richcompare*/
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183 offsetof(lockobject, in_weakreflist), /*tp_weaklistoffset*/
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184 0, /*tp_iter*/
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185 0, /*tp_iternext*/
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186 lock_methods, /*tp_methods*/
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187 };
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188
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189 /* Recursive lock objects */
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190
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191 typedef struct {
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192 PyObject_HEAD
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193 PyThread_type_lock rlock_lock;
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194 long rlock_owner;
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195 unsigned long rlock_count;
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196 PyObject *in_weakreflist;
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197 } rlockobject;
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198
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199 static void
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200 rlock_dealloc(rlockobject *self)
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201 {
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202 assert(self->rlock_lock);
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203 if (self->in_weakreflist != NULL)
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204 PyObject_ClearWeakRefs((PyObject *) self);
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205 /* Unlock the lock so it's safe to free it */
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206 if (self->rlock_count > 0)
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207 PyThread_release_lock(self->rlock_lock);
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208
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209 PyThread_free_lock(self->rlock_lock);
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210 Py_TYPE(self)->tp_free(self);
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211 }
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212
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213 static PyObject *
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214 rlock_acquire(rlockobject *self, PyObject *args, PyObject *kwds)
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215 {
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216 char *kwlist[] = {"blocking", "timeout", NULL};
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217 int blocking = 1;
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218 double timeout = -1;
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219 PY_TIMEOUT_T microseconds;
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220 long tid;
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221 int r = 1;
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222
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223 if (!PyArg_ParseTupleAndKeywords(args, kwds, "|id:acquire", kwlist,
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224 &blocking, &timeout))
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225 return NULL;
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226
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227 if (!blocking && timeout != -1) {
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228 PyErr_SetString(PyExc_ValueError, "can't specify a timeout "
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229 "for a non-blocking call");
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230 return NULL;
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231 }
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232 if (timeout < 0 && timeout != -1) {
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233 PyErr_SetString(PyExc_ValueError, "timeout value must be "
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234 "strictly positive");
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235 return NULL;
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236 }
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237 if (!blocking)
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238 microseconds = 0;
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239 else if (timeout == -1)
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240 microseconds = -1;
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241 else {
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242 timeout *= 1e6;
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243 if (timeout >= (double) PY_TIMEOUT_MAX) {
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244 PyErr_SetString(PyExc_OverflowError,
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245 "timeout value is too large");
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246 return NULL;
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247 }
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248 microseconds = (PY_TIMEOUT_T) timeout;
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249 }
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250
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251 tid = PyThread_get_thread_ident();
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252 if (self->rlock_count > 0 && tid == self->rlock_owner) {
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253 unsigned long count = self->rlock_count + 1;
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254 if (count <= self->rlock_count) {
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255 PyErr_SetString(PyExc_OverflowError,
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256 "Internal lock count overflowed");
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257 return NULL;
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258 }
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259 self->rlock_count = count;
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260 Py_RETURN_TRUE;
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261 }
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262
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263 if (self->rlock_count > 0 ||
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264 !PyThread_acquire_lock(self->rlock_lock, 0)) {
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265 if (microseconds == 0) {
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266 Py_RETURN_FALSE;
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267 }
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268 Py_BEGIN_ALLOW_THREADS
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269 r = PyThread_acquire_lock_timed(self->rlock_lock, microseconds);
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270 Py_END_ALLOW_THREADS
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271 }
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272 if (r) {
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273 assert(self->rlock_count == 0);
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274 self->rlock_owner = tid;
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275 self->rlock_count = 1;
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276 }
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277
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278 return PyBool_FromLong(r);
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279 }
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280
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281 PyDoc_STRVAR(rlock_acquire_doc,
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282 "acquire(blocking=True) -> bool\n\
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283 \n\
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284 Lock the lock. `blocking` indicates whether we should wait\n\
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285 for the lock to be available or not. If `blocking` is False\n\
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286 and another thread holds the lock, the method will return False\n\
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287 immediately. If `blocking` is True and another thread holds\n\
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288 the lock, the method will wait for the lock to be released,\n\
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289 take it and then return True.\n\
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290 (note: the blocking operation is not interruptible.)\n\
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291 \n\
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292 In all other cases, the method will return True immediately.\n\
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293 Precisely, if the current thread already holds the lock, its\n\
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294 internal counter is simply incremented. If nobody holds the lock,\n\
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295 the lock is taken and its internal counter initialized to 1.");
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296
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297 static PyObject *
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298 rlock_release(rlockobject *self)
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299 {
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300 long tid = PyThread_get_thread_ident();
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301
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302 if (self->rlock_count == 0 || self->rlock_owner != tid) {
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303 PyErr_SetString(PyExc_RuntimeError,
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304 "cannot release un-acquired lock");
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305 return NULL;
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306 }
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307 if (--self->rlock_count == 0) {
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308 self->rlock_owner = 0;
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309 PyThread_release_lock(self->rlock_lock);
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310 }
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311 Py_RETURN_NONE;
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312 }
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313
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314 PyDoc_STRVAR(rlock_release_doc,
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315 "release()\n\
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316 \n\
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317 Release the lock, allowing another thread that is blocked waiting for\n\
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318 the lock to acquire the lock. The lock must be in the locked state,\n\
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319 and must be locked by the same thread that unlocks it; otherwise a\n\
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320 `RuntimeError` is raised.\n\
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321 \n\
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322 Do note that if the lock was acquire()d several times in a row by the\n\
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323 current thread, release() needs to be called as many times for the lock\n\
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324 to be available for other threads.");
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325
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326 static PyObject *
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327 rlock_acquire_restore(rlockobject *self, PyObject *arg)
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328 {
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329 long owner;
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330 unsigned long count;
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331 int r = 1;
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332
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333 if (!PyArg_ParseTuple(arg, "kl:_acquire_restore", &count, &owner))
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334 return NULL;
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335
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336 if (!PyThread_acquire_lock(self->rlock_lock, 0)) {
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337 Py_BEGIN_ALLOW_THREADS
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338 r = PyThread_acquire_lock(self->rlock_lock, 1);
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339 Py_END_ALLOW_THREADS
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340 }
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341 if (!r) {
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342 PyErr_SetString(ThreadError, "couldn't acquire lock");
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343 return NULL;
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344 }
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345 assert(self->rlock_count == 0);
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346 self->rlock_owner = owner;
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347 self->rlock_count = count;
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348 Py_RETURN_NONE;
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349 }
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350
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351 PyDoc_STRVAR(rlock_acquire_restore_doc,
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352 "_acquire_restore(state) -> None\n\
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353 \n\
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354 For internal use by `threading.Condition`.");
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355
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356 static PyObject *
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357 rlock_release_save(rlockobject *self)
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358 {
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359 long owner;
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360 unsigned long count;
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361
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362 owner = self->rlock_owner;
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363 count = self->rlock_count;
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364 self->rlock_count = 0;
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365 self->rlock_owner = 0;
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366 PyThread_release_lock(self->rlock_lock);
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367 return Py_BuildValue("kl", count, owner);
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368 }
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369
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370 PyDoc_STRVAR(rlock_release_save_doc,
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371 "_release_save() -> tuple\n\
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372 \n\
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373 For internal use by `threading.Condition`.");
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374
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375
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376 static PyObject *
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377 rlock_is_owned(rlockobject *self)
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378 {
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379 long tid = PyThread_get_thread_ident();
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380
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381 if (self->rlock_count > 0 && self->rlock_owner == tid) {
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382 Py_RETURN_TRUE;
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383 }
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384 Py_RETURN_FALSE;
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385 }
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386
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387 PyDoc_STRVAR(rlock_is_owned_doc,
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388 "_is_owned() -> bool\n\
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389 \n\
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390 For internal use by `threading.Condition`.");
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391
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392 static PyObject *
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393 rlock_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
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394 {
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395 rlockobject *self;
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396
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397 self = (rlockobject *) type->tp_alloc(type, 0);
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398 if (self != NULL) {
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399 self->rlock_lock = PyThread_allocate_lock();
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400 if (self->rlock_lock == NULL) {
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401 type->tp_free(self);
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402 PyErr_SetString(ThreadError, "can't allocate lock");
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403 return NULL;
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404 }
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405 self->in_weakreflist = NULL;
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406 self->rlock_owner = 0;
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407 self->rlock_count = 0;
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408 }
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409
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410 return (PyObject *) self;
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411 }
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412
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413 static PyObject *
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414 rlock_repr(rlockobject *self)
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415 {
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416 return PyUnicode_FromFormat("<%s owner=%ld count=%lu>",
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417 Py_TYPE(self)->tp_name, self->rlock_owner, self->rlock_count);
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418 }
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419
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420
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421 static PyMethodDef rlock_methods[] = {
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422 {"acquire", (PyCFunction)rlock_acquire,
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423 METH_VARARGS | METH_KEYWORDS, rlock_acquire_doc},
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424 {"release", (PyCFunction)rlock_release,
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425 METH_NOARGS, rlock_release_doc},
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426 {"_is_owned", (PyCFunction)rlock_is_owned,
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427 METH_NOARGS, rlock_is_owned_doc},
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428 {"_acquire_restore", (PyCFunction)rlock_acquire_restore,
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429 METH_O, rlock_acquire_restore_doc},
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430 {"_release_save", (PyCFunction)rlock_release_save,
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431 METH_NOARGS, rlock_release_save_doc},
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432 {"__enter__", (PyCFunction)rlock_acquire,
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433 METH_VARARGS | METH_KEYWORDS, rlock_acquire_doc},
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434 {"__exit__", (PyCFunction)rlock_release,
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435 METH_VARARGS, rlock_release_doc},
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436 {NULL, NULL} /* sentinel */
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437 };
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438
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439
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440 static PyTypeObject RLocktype = {
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441 PyVarObject_HEAD_INIT(&PyType_Type, 0)
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442 "_thread.RLock", /*tp_name*/
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443 sizeof(rlockobject), /*tp_size*/
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444 0, /*tp_itemsize*/
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445 /* methods */
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446 (destructor)rlock_dealloc, /*tp_dealloc*/
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447 0, /*tp_print*/
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448 0, /*tp_getattr*/
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449 0, /*tp_setattr*/
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450 0, /*tp_reserved*/
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451 (reprfunc)rlock_repr, /*tp_repr*/
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452 0, /*tp_as_number*/
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453 0, /*tp_as_sequence*/
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454 0, /*tp_as_mapping*/
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455 0, /*tp_hash*/
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456 0, /*tp_call*/
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457 0, /*tp_str*/
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458 0, /*tp_getattro*/
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459 0, /*tp_setattro*/
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460 0, /*tp_as_buffer*/
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461 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
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462 0, /*tp_doc*/
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463 0, /*tp_traverse*/
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464 0, /*tp_clear*/
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465 0, /*tp_richcompare*/
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466 offsetof(rlockobject, in_weakreflist), /*tp_weaklistoffset*/
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467 0, /*tp_iter*/
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468 0, /*tp_iternext*/
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469 rlock_methods, /*tp_methods*/
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470 0, /* tp_members */
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471 0, /* tp_getset */
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472 0, /* tp_base */
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473 0, /* tp_dict */
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474 0, /* tp_descr_get */
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475 0, /* tp_descr_set */
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476 0, /* tp_dictoffset */
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477 0, /* tp_init */
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478 PyType_GenericAlloc, /* tp_alloc */
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479 rlock_new /* tp_new */
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480 };
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481
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482 static lockobject *
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483 newlockobject(void)
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484 {
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485 lockobject *self;
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486 self = PyObject_New(lockobject, &Locktype);
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487 if (self == NULL)
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488 return NULL;
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489 self->lock_lock = PyThread_allocate_lock();
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490 self->in_weakreflist = NULL;
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491 if (self->lock_lock == NULL) {
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492 Py_DECREF(self);
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493 PyErr_SetString(ThreadError, "can't allocate lock");
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494 return NULL;
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495 }
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496 return self;
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497 }
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498
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499 /* Thread-local objects */
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500
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501 #include "structmember.h"
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502
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503 /* Quick overview:
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504
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505 We need to be able to reclaim reference cycles as soon as possible
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506 (both when a thread is being terminated, or a thread-local object
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507 becomes unreachable from user data). Constraints:
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508 - it must not be possible for thread-state dicts to be involved in
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509 reference cycles (otherwise the cyclic GC will refuse to consider
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510 objects referenced from a reachable thread-state dict, even though
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511 local_dealloc would clear them)
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512 - the death of a thread-state dict must still imply destruction of the
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513 corresponding local dicts in all thread-local objects.
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514
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515 Our implementation uses small "localdummy" objects in order to break
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516 the reference chain. These trivial objects are hashable (using the
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517 default scheme of identity hashing) and weakrefable.
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518 Each thread-state holds a separate localdummy for each local object
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519 (as a /strong reference/),
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520 and each thread-local object holds a dict mapping /weak references/
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521 of localdummies to local dicts.
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diff changeset
522
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
523 Therefore:
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
524 - only the thread-state dict holds a strong reference to the dummies
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
525 - only the thread-local object holds a strong reference to the local dicts
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
526 - only outside objects (application- or library-level) hold strong
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
527 references to the thread-local objects
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
528 - as soon as a thread-state dict is destroyed, the weakref callbacks of all
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
529 dummies attached to that thread are called, and destroy the corresponding
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
530 local dicts from thread-local objects
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
531 - as soon as a thread-local object is destroyed, its local dicts are
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
532 destroyed and its dummies are manually removed from all thread states
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
533 - the GC can do its work correctly when a thread-local object is dangling,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
534 without any interference from the thread-state dicts
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
535
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
536 As an additional optimization, each localdummy holds a borrowed reference
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
537 to the corresponding localdict. This borrowed reference is only used
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
538 by the thread-local object which has created the localdummy, which should
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
539 guarantee that the localdict still exists when accessed.
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
540 */
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
541
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
542 typedef struct {
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
543 PyObject_HEAD
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
544 PyObject *localdict; /* Borrowed reference! */
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
545 PyObject *weakreflist; /* List of weak references to self */
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
546 } localdummyobject;
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
547
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
548 static void
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
549 localdummy_dealloc(localdummyobject *self)
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
550 {
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
551 if (self->weakreflist != NULL)
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
552 PyObject_ClearWeakRefs((PyObject *) self);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
553 Py_TYPE(self)->tp_free((PyObject*)self);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
554 }
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
555
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
556 static PyTypeObject localdummytype = {
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
557 PyVarObject_HEAD_INIT(NULL, 0)
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
558 /* tp_name */ "_thread._localdummy",
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
559 /* tp_basicsize */ sizeof(localdummyobject),
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
560 /* tp_itemsize */ 0,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
561 /* tp_dealloc */ (destructor)localdummy_dealloc,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
562 /* tp_print */ 0,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
563 /* tp_getattr */ 0,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
564 /* tp_setattr */ 0,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
565 /* tp_reserved */ 0,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
566 /* tp_repr */ 0,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
567 /* tp_as_number */ 0,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
568 /* tp_as_sequence */ 0,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
569 /* tp_as_mapping */ 0,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
570 /* tp_hash */ 0,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
571 /* tp_call */ 0,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
572 /* tp_str */ 0,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
573 /* tp_getattro */ 0,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
574 /* tp_setattro */ 0,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
575 /* tp_as_buffer */ 0,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
576 /* tp_flags */ Py_TPFLAGS_DEFAULT,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
577 /* tp_doc */ "Thread-local dummy",
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
578 /* tp_traverse */ 0,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
579 /* tp_clear */ 0,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
580 /* tp_richcompare */ 0,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
581 /* tp_weaklistoffset */ offsetof(localdummyobject, weakreflist)
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
582 };
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
583
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
584
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
585 typedef struct {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
586 PyObject_HEAD
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
587 PyObject *key;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
588 PyObject *args;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
589 PyObject *kw;
63897
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
590 PyObject *weakreflist; /* List of weak references to self */
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
591 /* A {localdummy weakref -> localdict} dict */
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
592 PyObject *dummies;
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
593 /* The callback for weakrefs to localdummies */
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
594 PyObject *wr_callback;
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
595 } localobject;
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
596
63897
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
597 /* Forward declaration */
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
598 static PyObject *_ldict(localobject *self);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
599 static PyObject *_localdummy_destroyed(PyObject *meth_self, PyObject *dummyweakref);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
600
64298
0265d5f7bd07 Issue #1868: Eliminate subtle timing issues in thread-local objects by
Antoine Pitrou <solipsis@pitrou.net>
parents: 64076
diff changeset
601 /* Create and register the dummy for the current thread.
0265d5f7bd07 Issue #1868: Eliminate subtle timing issues in thread-local objects by
Antoine Pitrou <solipsis@pitrou.net>
parents: 64076
diff changeset
602 Returns a borrowed reference of the corresponding local dict */
0265d5f7bd07 Issue #1868: Eliminate subtle timing issues in thread-local objects by
Antoine Pitrou <solipsis@pitrou.net>
parents: 64076
diff changeset
603 static PyObject *
63897
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
604 _local_create_dummy(localobject *self)
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
605 {
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
606 PyObject *tdict, *ldict = NULL, *wr = NULL;
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
607 localdummyobject *dummy = NULL;
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
608 int r;
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
609
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
610 tdict = PyThreadState_GetDict();
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
611 if (tdict == NULL) {
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
612 PyErr_SetString(PyExc_SystemError,
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
613 "Couldn't get thread-state dictionary");
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
614 goto err;
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
615 }
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
616
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
617 ldict = PyDict_New();
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
618 if (ldict == NULL)
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
619 goto err;
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
620 dummy = (localdummyobject *) localdummytype.tp_alloc(&localdummytype, 0);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
621 if (dummy == NULL)
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
622 goto err;
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
623 dummy->localdict = ldict;
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
624 wr = PyWeakref_NewRef((PyObject *) dummy, self->wr_callback);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
625 if (wr == NULL)
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
626 goto err;
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
627
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
628 /* As a side-effect, this will cache the weakref's hash before the
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
629 dummy gets deleted */
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
630 r = PyDict_SetItem(self->dummies, wr, ldict);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
631 if (r < 0)
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
632 goto err;
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
633 Py_CLEAR(wr);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
634 r = PyDict_SetItem(tdict, self->key, (PyObject *) dummy);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
635 if (r < 0)
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
636 goto err;
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
637 Py_CLEAR(dummy);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
638
64298
0265d5f7bd07 Issue #1868: Eliminate subtle timing issues in thread-local objects by
Antoine Pitrou <solipsis@pitrou.net>
parents: 64076
diff changeset
639 Py_DECREF(ldict);
0265d5f7bd07 Issue #1868: Eliminate subtle timing issues in thread-local objects by
Antoine Pitrou <solipsis@pitrou.net>
parents: 64076
diff changeset
640 return ldict;
63897
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
641
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
642 err:
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
643 Py_XDECREF(ldict);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
644 Py_XDECREF(wr);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
645 Py_XDECREF(dummy);
64298
0265d5f7bd07 Issue #1868: Eliminate subtle timing issues in thread-local objects by
Antoine Pitrou <solipsis@pitrou.net>
parents: 64076
diff changeset
646 return NULL;
63897
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
647 }
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
648
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
649 static PyObject *
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
650 local_new(PyTypeObject *type, PyObject *args, PyObject *kw)
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
651 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
652 localobject *self;
63897
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
653 PyObject *wr;
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
654 static PyMethodDef wr_callback_def = {
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
655 "_localdummy_destroyed", (PyCFunction) _localdummy_destroyed, METH_O
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
656 };
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
657
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
658 if (type->tp_init == PyBaseObject_Type.tp_init
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
659 && ((args && PyObject_IsTrue(args))
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
660 || (kw && PyObject_IsTrue(kw)))) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
661 PyErr_SetString(PyExc_TypeError,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
662 "Initialization arguments are not supported");
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
663 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
664 }
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
665
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
666 self = (localobject *)type->tp_alloc(type, 0);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
667 if (self == NULL)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
668 return NULL;
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
669
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
670 Py_XINCREF(args);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
671 self->args = args;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
672 Py_XINCREF(kw);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
673 self->kw = kw;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
674 self->key = PyUnicode_FromFormat("thread.local.%p", self);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
675 if (self->key == NULL)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
676 goto err;
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
677
63897
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
678 self->dummies = PyDict_New();
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
679 if (self->dummies == NULL)
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
680 goto err;
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
681
63897
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
682 /* We use a weak reference to self in the callback closure
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
683 in order to avoid spurious reference cycles */
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
684 wr = PyWeakref_NewRef((PyObject *) self, NULL);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
685 if (wr == NULL)
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
686 goto err;
63897
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
687 self->wr_callback = PyCFunction_New(&wr_callback_def, wr);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
688 Py_DECREF(wr);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
689 if (self->wr_callback == NULL)
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
690 goto err;
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
691
64298
0265d5f7bd07 Issue #1868: Eliminate subtle timing issues in thread-local objects by
Antoine Pitrou <solipsis@pitrou.net>
parents: 64076
diff changeset
692 if (_local_create_dummy(self) == NULL)
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
693 goto err;
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
694
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
695 return (PyObject *)self;
35086
c6b7fadf0ada Consistently use hard tabs for indentation.
Michael W. Hudson <mwh@python.net>
parents: 35085
diff changeset
696
c6b7fadf0ada Consistently use hard tabs for indentation.
Michael W. Hudson <mwh@python.net>
parents: 35085
diff changeset
697 err:
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
698 Py_DECREF(self);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
699 return NULL;
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
700 }
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
701
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
702 static int
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
703 local_traverse(localobject *self, visitproc visit, void *arg)
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
704 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
705 Py_VISIT(self->args);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
706 Py_VISIT(self->kw);
63897
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
707 Py_VISIT(self->dummies);
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
708 return 0;
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
709 }
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
710
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
711 static int
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
712 local_clear(localobject *self)
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
713 {
63897
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
714 PyThreadState *tstate;
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
715 Py_CLEAR(self->args);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
716 Py_CLEAR(self->kw);
63897
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
717 Py_CLEAR(self->dummies);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
718 Py_CLEAR(self->wr_callback);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
719 /* Remove all strong references to dummies from the thread states */
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
720 if (self->key
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
721 && (tstate = PyThreadState_Get())
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
722 && tstate->interp) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
723 for(tstate = PyInterpreterState_ThreadHead(tstate->interp);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
724 tstate;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
725 tstate = PyThreadState_Next(tstate))
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
726 if (tstate->dict &&
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
727 PyDict_GetItem(tstate->dict, self->key))
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
728 PyDict_DelItem(tstate->dict, self->key);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
729 }
63897
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
730 return 0;
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
731 }
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
732
63897
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
733 static void
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
734 local_dealloc(localobject *self)
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
735 {
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
736 /* Weakrefs must be invalidated right now, otherwise they can be used
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
737 from code called below, which is very dangerous since Py_REFCNT(self) == 0 */
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
738 if (self->weakreflist != NULL)
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
739 PyObject_ClearWeakRefs((PyObject *) self);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
740
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
741 PyObject_GC_UnTrack(self);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
742
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
743 local_clear(self);
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
744 Py_XDECREF(self->key);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
745 Py_TYPE(self)->tp_free((PyObject*)self);
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
746 }
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
747
63897
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
748 /* Returns a borrowed reference to the local dict, creating it if necessary */
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
749 static PyObject *
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
750 _ldict(localobject *self)
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
751 {
63897
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
752 PyObject *tdict, *ldict, *dummy;
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
753
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
754 tdict = PyThreadState_GetDict();
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
755 if (tdict == NULL) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
756 PyErr_SetString(PyExc_SystemError,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
757 "Couldn't get thread-state dictionary");
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
758 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
759 }
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
760
63897
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
761 dummy = PyDict_GetItem(tdict, self->key);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
762 if (dummy == NULL) {
64298
0265d5f7bd07 Issue #1868: Eliminate subtle timing issues in thread-local objects by
Antoine Pitrou <solipsis@pitrou.net>
parents: 64076
diff changeset
763 ldict = _local_create_dummy(self);
0265d5f7bd07 Issue #1868: Eliminate subtle timing issues in thread-local objects by
Antoine Pitrou <solipsis@pitrou.net>
parents: 64076
diff changeset
764 if (ldict == NULL)
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
765 return NULL;
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
766
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
767 if (Py_TYPE(self)->tp_init != PyBaseObject_Type.tp_init &&
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
768 Py_TYPE(self)->tp_init((PyObject*)self,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
769 self->args, self->kw) < 0) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
770 /* we need to get rid of ldict from thread so
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
771 we create a new one the next time we do an attr
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
772 acces */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
773 PyDict_DelItem(tdict, self->key);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
774 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
775 }
63897
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
776 }
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
777 else {
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
778 assert(Py_TYPE(dummy) == &localdummytype);
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
779 ldict = ((localdummyobject *) dummy)->localdict;
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
780 }
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
781
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 60598
diff changeset
782 return ldict;
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
783 }
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
784
97768d87394a Implemented thread-local data as proposed on python-dev:
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785 static int
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diff changeset
786 local_setattro(localobject *self, PyObject *name, PyObject *v)
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diff changeset
787 {
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788 PyObject *ldict;
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789 int r;
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790
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791 ldict = _ldict(self);
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792 if (ldict == NULL)
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793 return -1;
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794
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795 r = PyObject_RichCompareBool(name, str_dict, Py_EQ);
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796 if (r == 1) {
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797 PyErr_Format(PyExc_AttributeError,
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798 "'%.50s' object attribute '%U' is read-only",
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799 Py_TYPE(self)->tp_name, name);
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800 return -1;
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801 }
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802 if (r == -1)
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803 return -1;
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804
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805 return _PyObject_GenericSetAttrWithDict((PyObject *)self, name, v, ldict);
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806 }
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807
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808 static PyObject *local_getattro(localobject *, PyObject *);
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809
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810 static PyTypeObject localtype = {
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811 PyVarObject_HEAD_INIT(NULL, 0)
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812 /* tp_name */ "_thread._local",
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813 /* tp_basicsize */ sizeof(localobject),
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814 /* tp_itemsize */ 0,
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815 /* tp_dealloc */ (destructor)local_dealloc,
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816 /* tp_print */ 0,
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817 /* tp_getattr */ 0,
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818 /* tp_setattr */ 0,
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819 /* tp_reserved */ 0,
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820 /* tp_repr */ 0,
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821 /* tp_as_number */ 0,
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822 /* tp_as_sequence */ 0,
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823 /* tp_as_mapping */ 0,
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824 /* tp_hash */ 0,
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825 /* tp_call */ 0,
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826 /* tp_str */ 0,
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827 /* tp_getattro */ (getattrofunc)local_getattro,
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828 /* tp_setattro */ (setattrofunc)local_setattro,
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829 /* tp_as_buffer */ 0,
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830 /* tp_flags */ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE
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831 | Py_TPFLAGS_HAVE_GC,
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832 /* tp_doc */ "Thread-local data",
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833 /* tp_traverse */ (traverseproc)local_traverse,
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834 /* tp_clear */ (inquiry)local_clear,
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835 /* tp_richcompare */ 0,
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836 /* tp_weaklistoffset */ offsetof(localobject, weakreflist),
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837 /* tp_iter */ 0,
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838 /* tp_iternext */ 0,
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839 /* tp_methods */ 0,
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840 /* tp_members */ 0,
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841 /* tp_getset */ 0,
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842 /* tp_base */ 0,
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843 /* tp_dict */ 0, /* internal use */
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844 /* tp_descr_get */ 0,
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845 /* tp_descr_set */ 0,
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846 /* tp_dictoffset */ 0,
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847 /* tp_init */ 0,
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848 /* tp_alloc */ 0,
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diff changeset
849 /* tp_new */ local_new,
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850 /* tp_free */ 0, /* Low-level free-mem routine */
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851 /* tp_is_gc */ 0, /* For PyObject_IS_GC */
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852 };
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853
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854 static PyObject *
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855 local_getattro(localobject *self, PyObject *name)
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856 {
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857 PyObject *ldict, *value;
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858 int r;
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859
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860 ldict = _ldict(self);
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861 if (ldict == NULL)
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862 return NULL;
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863
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864 r = PyObject_RichCompareBool(name, str_dict, Py_EQ);
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865 if (r == 1) {
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866 Py_INCREF(ldict);
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867 return ldict;
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868 }
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869 if (r == -1)
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870 return NULL;
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871
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872 if (Py_TYPE(self) != &localtype)
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873 /* use generic lookup for subtypes */
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874 return _PyObject_GenericGetAttrWithDict((PyObject *)self, name, ldict);
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875
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876 /* Optimization: just look in dict ourselves */
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877 value = PyDict_GetItem(ldict, name);
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878 if (value == NULL)
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879 /* Fall back on generic to get __class__ and __dict__ */
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880 return _PyObject_GenericGetAttrWithDict((PyObject *)self, name, ldict);
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881
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882 Py_INCREF(value);
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883 return value;
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884 }
923
72aceed365d4 * Makefile adapted to changes below.
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885
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886 /* Called when a dummy is destroyed. */
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887 static PyObject *
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888 _localdummy_destroyed(PyObject *localweakref, PyObject *dummyweakref)
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889 {
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890 PyObject *obj;
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891 localobject *self;
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892 assert(PyWeakref_CheckRef(localweakref));
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893 obj = PyWeakref_GET_OBJECT(localweakref);
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894 if (obj == Py_None)
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895 Py_RETURN_NONE;
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896 Py_INCREF(obj);
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897 assert(PyObject_TypeCheck(obj, &localtype));
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898 /* If the thread-local object is still alive and not being cleared,
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899 remove the corresponding local dict */
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900 self = (localobject *) obj;
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901 if (self->dummies != NULL) {
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902 PyObject *ldict;
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903 ldict = PyDict_GetItem(self->dummies, dummyweakref);
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904 if (ldict != NULL) {
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905 PyDict_DelItem(self->dummies, dummyweakref);
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906 }
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907 if (PyErr_Occurred())
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908 PyErr_WriteUnraisable(obj);
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909 }
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910 Py_DECREF(obj);
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diff changeset
911 Py_RETURN_NONE;
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
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diff changeset
912 }
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
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diff changeset
913
923
72aceed365d4 * Makefile adapted to changes below.
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parents:
diff changeset
914 /* Module functions */
72aceed365d4 * Makefile adapted to changes below.
Guido van Rossum <guido@python.org>
parents:
diff changeset
915
5405
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents: 4944
diff changeset
916 struct bootstate {
61466
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diff changeset
917 PyInterpreterState *interp;
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diff changeset
918 PyObject *func;
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diff changeset
919 PyObject *args;
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diff changeset
920 PyObject *keyw;
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diff changeset
921 PyThreadState *tstate;
5405
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents: 4944
diff changeset
922 };
923
72aceed365d4 * Makefile adapted to changes below.
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parents:
diff changeset
923
5405
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents: 4944
diff changeset
924 static void
13497
95454b73ea91 ANSI-fication
Peter Schneider-Kamp <nowonder@nowonder.de>
parents: 13256
diff changeset
925 t_bootstrap(void *boot_raw)
5405
b7871ca930ad Massive changes for separate thread state management.
Guido van Rossum <guido@python.org>
parents: 4944
diff changeset
926 {
61466
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diff changeset
927 struct bootstate *boot = (struct bootstate *) boot_raw;
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diff changeset
928 PyThreadState *tstate;
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diff changeset
929 PyObject *res;
961
a31e07847063 New thread.c from Sjoerd, supports _exit_prog(). Use this in goaway()
Guido van Rossum <guido@python.org>
parents: 926
diff changeset
930
61466
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diff changeset
931 tstate = boot->tstate;
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diff changeset
932 tstate->thread_id = PyThread_get_thread_ident();
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diff changeset
933 _PyThreadState_Init(tstate);
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diff changeset
934 PyEval_AcquireThread(tstate);
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diff changeset
935 nb_threads++;
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diff changeset
936 res = PyEval_CallObjectWithKeywords(
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diff changeset
937 boot->func, boot->args, boot->keyw);
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diff changeset
938 if (res == NULL) {
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diff changeset
939 if (PyErr_ExceptionMatches(PyExc_SystemExit))
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diff changeset
940 PyErr_Clear();
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diff changeset
941 else {
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diff changeset
942 PyObject *file;
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diff changeset
943 PySys_WriteStderr(
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diff changeset
944 "Unhandled exception in thread started by ");
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diff changeset
945 file = PySys_GetObject("stderr");
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diff changeset
946 if (file != NULL && file != Py_None)
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diff changeset
947 PyFile_WriteObject(boot->func, file, 0);
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diff changeset
948 else
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diff changeset
949 PyObject_Print(boot->func, stderr, 0);
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950 PySys_WriteStderr("\n");
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951 PyErr_PrintEx(0);
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952 }
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953 }
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954 else
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955 Py_DECREF(res);
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956 Py_DECREF(boot->func);
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957 Py_DECREF(boot->args);
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958 Py_XDECREF(boot->keyw);
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959 PyMem_DEL(boot_raw);
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960 nb_threads--;
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961 PyThreadState_Clear(tstate);
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962 PyThreadState_DeleteCurrent();
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963 PyThread_exit_thread();
923
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diff changeset
964 }
72aceed365d4 * Makefile adapted to changes below.
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parents:
diff changeset
965
4751
7ab835f87f86 Renamed.
Barry Warsaw <barry@python.org>
parents: 4600
diff changeset
966 static PyObject *
13497
95454b73ea91 ANSI-fication
Peter Schneider-Kamp <nowonder@nowonder.de>
parents: 13256
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967 thread_PyThread_start_new_thread(PyObject *self, PyObject *fargs)
923
72aceed365d4 * Makefile adapted to changes below.
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parents:
diff changeset
968 {
61466
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969 PyObject *func, *args, *keyw = NULL;
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970 struct bootstate *boot;
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971 long ident;
923
72aceed365d4 * Makefile adapted to changes below.
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972
61466
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973 if (!PyArg_UnpackTuple(fargs, "start_new_thread", 2, 3,
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diff changeset
974 &func, &args, &keyw))
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975 return NULL;
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976 if (!PyCallable_Check(func)) {
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diff changeset
977 PyErr_SetString(PyExc_TypeError,
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diff changeset
978 "first arg must be callable");
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979 return NULL;
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980 }
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981 if (!PyTuple_Check(args)) {
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982 PyErr_SetString(PyExc_TypeError,
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diff changeset
983 "2nd arg must be a tuple");
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diff changeset
984 return NULL;
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diff changeset
985 }
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diff changeset
986 if (keyw != NULL && !PyDict_Check(keyw)) {
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diff changeset
987 PyErr_SetString(PyExc_TypeError,
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diff changeset
988 "optional 3rd arg must be a dictionary");
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diff changeset
989 return NULL;
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diff changeset
990 }
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991 boot = PyMem_NEW(struct bootstate, 1);
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diff changeset
992 if (boot == NULL)
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993 return PyErr_NoMemory();
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994 boot->interp = PyThreadState_GET()->interp;
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diff changeset
995 boot->func = func;
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diff changeset
996 boot->args = args;
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diff changeset
997 boot->keyw = keyw;
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diff changeset
998 boot->tstate = _PyThreadState_Prealloc(boot->interp);
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diff changeset
999 if (boot->tstate == NULL) {
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diff changeset
1000 PyMem_DEL(boot);
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1001 return PyErr_NoMemory();
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1002 }
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diff changeset
1003 Py_INCREF(func);
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1004 Py_INCREF(args);
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1005 Py_XINCREF(keyw);
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diff changeset
1006 PyEval_InitThreads(); /* Start the interpreter's thread-awareness */
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diff changeset
1007 ident = PyThread_start_new_thread(t_bootstrap, (void*) boot);
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1008 if (ident == -1) {
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1009 PyErr_SetString(ThreadError, "can't start new thread");
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diff changeset
1010 Py_DECREF(func);
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diff changeset
1011 Py_DECREF(args);
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diff changeset
1012 Py_XDECREF(keyw);
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1013 PyThreadState_Clear(boot->tstate);
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diff changeset
1014 PyMem_DEL(boot);
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1015 return NULL;
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1016 }
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1017 return PyLong_FromLong(ident);
923
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diff changeset
1018 }
72aceed365d4 * Makefile adapted to changes below.
Guido van Rossum <guido@python.org>
parents:
diff changeset
1019
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 22865
diff changeset
1020 PyDoc_STRVAR(start_new_doc,
20266
241ef8a923c7 Fix typo in docstring
Andrew M. Kuchling <amk@amk.ca>
parents: 16140
diff changeset
1021 "start_new_thread(function, args[, kwargs])\n\
8562
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Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1022 (start_new() is an obsolete synonym)\n\
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1023 \n\
20468
ebfd87e87884 Partial patch from SF #452266, by Jason Petrone.
Guido van Rossum <guido@python.org>
parents: 20266
diff changeset
1024 Start a new thread and return its identifier. The thread will call the\n\
ebfd87e87884 Partial patch from SF #452266, by Jason Petrone.
Guido van Rossum <guido@python.org>
parents: 20266
diff changeset
1025 function with positional arguments from the tuple args and keyword arguments\n\
ebfd87e87884 Partial patch from SF #452266, by Jason Petrone.
Guido van Rossum <guido@python.org>
parents: 20266
diff changeset
1026 taken from the optional dictionary kwargs. The thread exits when the\n\
ebfd87e87884 Partial patch from SF #452266, by Jason Petrone.
Guido van Rossum <guido@python.org>
parents: 20266
diff changeset
1027 function returns; the return value is ignored. The thread will also exit\n\
ebfd87e87884 Partial patch from SF #452266, by Jason Petrone.
Guido van Rossum <guido@python.org>
parents: 20266
diff changeset
1028 when the function raises an unhandled exception; a stack trace will be\n\
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 22865
diff changeset
1029 printed unless the exception is SystemExit.\n");
8562
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1030
4751
7ab835f87f86 Renamed.
Barry Warsaw <barry@python.org>
parents: 4600
diff changeset
1031 static PyObject *
22561
043ad7adc896 Remove many uses of PyArg_NoArgs macro, change METH_OLDARGS to METH_NOARGS.
Neal Norwitz <nnorwitz@gmail.com>
parents: 21313
diff changeset
1032 thread_PyThread_exit_thread(PyObject *self)
923
72aceed365d4 * Makefile adapted to changes below.
Guido van Rossum <guido@python.org>
parents:
diff changeset
1033 {
61466
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1034 PyErr_SetNone(PyExc_SystemExit);
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diff changeset
1035 return NULL;
923
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parents:
diff changeset
1036 }
72aceed365d4 * Makefile adapted to changes below.
Guido van Rossum <guido@python.org>
parents:
diff changeset
1037
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 22865
diff changeset
1038 PyDoc_STRVAR(exit_doc,
8562
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Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1039 "exit()\n\
9679
877d23bd5bdc Thanks to Chris Herborth, the thread primitives now have proper Py*
Guido van Rossum <guido@python.org>
parents: 9588
diff changeset
1040 (PyThread_exit_thread() is an obsolete synonym)\n\
8562
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1041 \n\
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1042 This is synonymous to ``raise SystemExit''. It will cause the current\n\
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 22865
diff changeset
1043 thread to exit silently unless the exception is caught.");
8562
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1044
29444
8d160095eb66 Add interrupt_main() to thread module.
Kurt B. Kaiser <kbk@shore.net>
parents: 28889
diff changeset
1045 static PyObject *
29498
1402f265e48f Correct function name.
Kurt B. Kaiser <kbk@shore.net>
parents: 29444
diff changeset
1046 thread_PyThread_interrupt_main(PyObject * self)
29444
8d160095eb66 Add interrupt_main() to thread module.
Kurt B. Kaiser <kbk@shore.net>
parents: 28889
diff changeset
1047 {
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1048 PyErr_SetInterrupt();
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diff changeset
1049 Py_INCREF(Py_None);
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diff changeset
1050 return Py_None;
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8d160095eb66 Add interrupt_main() to thread module.
Kurt B. Kaiser <kbk@shore.net>
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diff changeset
1051 }
8d160095eb66 Add interrupt_main() to thread module.
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diff changeset
1052
8d160095eb66 Add interrupt_main() to thread module.
Kurt B. Kaiser <kbk@shore.net>
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diff changeset
1053 PyDoc_STRVAR(interrupt_doc,
8d160095eb66 Add interrupt_main() to thread module.
Kurt B. Kaiser <kbk@shore.net>
parents: 28889
diff changeset
1054 "interrupt_main()\n\
8d160095eb66 Add interrupt_main() to thread module.
Kurt B. Kaiser <kbk@shore.net>
parents: 28889
diff changeset
1055 \n\
8d160095eb66 Add interrupt_main() to thread module.
Kurt B. Kaiser <kbk@shore.net>
parents: 28889
diff changeset
1056 Raise a KeyboardInterrupt in the main thread.\n\
29498
1402f265e48f Correct function name.
Kurt B. Kaiser <kbk@shore.net>
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diff changeset
1057 A subthread can use this function to interrupt the main thread."
29444
8d160095eb66 Add interrupt_main() to thread module.
Kurt B. Kaiser <kbk@shore.net>
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diff changeset
1058 );
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Kurt B. Kaiser <kbk@shore.net>
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diff changeset
1059
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diff changeset
1060 static lockobject *newlockobject(void);
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1061
4751
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Barry Warsaw <barry@python.org>
parents: 4600
diff changeset
1062 static PyObject *
22561
043ad7adc896 Remove many uses of PyArg_NoArgs macro, change METH_OLDARGS to METH_NOARGS.
Neal Norwitz <nnorwitz@gmail.com>
parents: 21313
diff changeset
1063 thread_PyThread_allocate_lock(PyObject *self)
923
72aceed365d4 * Makefile adapted to changes below.
Guido van Rossum <guido@python.org>
parents:
diff changeset
1064 {
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1065 return (PyObject *) newlockobject();
923
72aceed365d4 * Makefile adapted to changes below.
Guido van Rossum <guido@python.org>
parents:
diff changeset
1066 }
72aceed365d4 * Makefile adapted to changes below.
Guido van Rossum <guido@python.org>
parents:
diff changeset
1067
23832
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parents: 22865
diff changeset
1068 PyDoc_STRVAR(allocate_doc,
8562
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parents: 8433
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1069 "allocate_lock() -> lock object\n\
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
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parents: 8433
diff changeset
1070 (allocate() is an obsolete synonym)\n\
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
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parents: 8433
diff changeset
1071 \n\
64076
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Alexander Belopolsky <alexander.belopolsky@gmail.com>
parents: 63897
diff changeset
1072 Create a new lock object. See help(LockType) for information about locks.");
8562
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1073
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Barry Warsaw <barry@python.org>
parents: 4600
diff changeset
1074 static PyObject *
22561
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Neal Norwitz <nnorwitz@gmail.com>
parents: 21313
diff changeset
1075 thread_get_ident(PyObject *self)
1746
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parents: 1418
diff changeset
1076 {
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diff changeset
1077 long ident;
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diff changeset
1078 ident = PyThread_get_thread_ident();
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diff changeset
1079 if (ident == -1) {
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1080 PyErr_SetString(ThreadError, "no current thread ident");
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1081 return NULL;
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1082 }
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1083 return PyLong_FromLong(ident);
1746
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diff changeset
1084 }
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1085
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parents: 22865
diff changeset
1086 PyDoc_STRVAR(get_ident_doc,
8562
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Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1087 "get_ident() -> integer\n\
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1088 \n\
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parents: 8433
diff changeset
1089 Return a non-zero integer that uniquely identifies the current thread\n\
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
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parents: 8433
diff changeset
1090 amongst other threads that exist simultaneously.\n\
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1091 This may be used to identify per-thread resources.\n\
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1092 Even though on some platforms threads identities may appear to be\n\
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1093 allocated consecutive numbers starting at 1, this behavior should not\n\
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1094 be relied upon, and the number should be seen purely as a magic cookie.\n\
23832
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Martin v. Löwis <martin@v.loewis.de>
parents: 22865
diff changeset
1095 A thread's identity may be reused for another thread after it exits.");
8562
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Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1096
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diff changeset
1097 static PyObject *
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1098 thread__count(PyObject *self)
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1099 {
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1100 return PyLong_FromLong(nb_threads);
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1101 }
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1102
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1103 PyDoc_STRVAR(_count_doc,
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diff changeset
1104 "_count() -> integer\n\
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diff changeset
1105 \n\
56992
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1106 \
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1107 Return the number of currently running Python threads, excluding \n\
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diff changeset
1108 the main thread. The returned number comprises all threads created\n\
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1109 through `start_new_thread()` as well as `threading.Thread`, and not\n\
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diff changeset
1110 yet finished.\n\
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1111 \n\
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1112 This function is meant for internal and specialized purposes only.\n\
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diff changeset
1113 In most applications `threading.enumerate()` should be used instead.");
56981
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diff changeset
1114
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1115 static PyObject *
39442
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diff changeset
1116 thread_stack_size(PyObject *self, PyObject *args)
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diff changeset
1117 {
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diff changeset
1118 size_t old_size;
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diff changeset
1119 Py_ssize_t new_size = 0;
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diff changeset
1120 int rc;
39442
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diff changeset
1121
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1122 if (!PyArg_ParseTuple(args, "|n:stack_size", &new_size))
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1123 return NULL;
39442
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1124
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1125 if (new_size < 0) {
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diff changeset
1126 PyErr_SetString(PyExc_ValueError,
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diff changeset
1127 "size must be 0 or a positive value");
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diff changeset
1128 return NULL;
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1129 }
39442
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diff changeset
1130
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diff changeset
1131 old_size = PyThread_get_stacksize();
39442
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diff changeset
1132
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diff changeset
1133 rc = PyThread_set_stacksize((size_t) new_size);
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diff changeset
1134 if (rc == -1) {
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diff changeset
1135 PyErr_Format(PyExc_ValueError,
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diff changeset
1136 "size not valid: %zd bytes",
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diff changeset
1137 new_size);
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diff changeset
1138 return NULL;
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diff changeset
1139 }
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1140 if (rc == -2) {
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diff changeset
1141 PyErr_SetString(ThreadError,
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diff changeset
1142 "setting stack size not supported");
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diff changeset
1143 return NULL;
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1144 }
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diff changeset
1145
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1146 return PyLong_FromSsize_t((Py_ssize_t) old_size);
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1147 }
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diff changeset
1148
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1149 PyDoc_STRVAR(stack_size_doc,
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diff changeset
1150 "stack_size([size]) -> size\n\
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1151 \n\
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1152 Return the thread stack size used when creating new threads. The\n\
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diff changeset
1153 optional size argument specifies the stack size (in bytes) to be used\n\
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diff changeset
1154 for subsequently created threads, and must be 0 (use platform or\n\
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1155 configured default) or a positive integer value of at least 32,768 (32k).\n\
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diff changeset
1156 If changing the thread stack size is unsupported, a ThreadError\n\
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diff changeset
1157 exception is raised. If the specified size is invalid, a ValueError\n\
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1158 exception is raised, and the stack size is unmodified. 32k bytes\n\
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1159 currently the minimum supported stack size value to guarantee\n\
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diff changeset
1160 sufficient stack space for the interpreter itself.\n\
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1161 \n\
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1162 Note that some platforms may have particular restrictions on values for\n\
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1163 the stack size, such as requiring a minimum stack size larger than 32kB or\n\
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1164 requiring allocation in multiples of the system memory page size\n\
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1165 - platform documentation should be referred to for more information\n\
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1166 (4kB pages are common; using multiples of 4096 for the stack size is\n\
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1167 the suggested approach in the absence of more specific information).");
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1168
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1169 static PyMethodDef thread_methods[] = {
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1170 {"start_new_thread", (PyCFunction)thread_PyThread_start_new_thread,
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1171 METH_VARARGS,
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1172 start_new_doc},
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1173 {"start_new", (PyCFunction)thread_PyThread_start_new_thread,
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1174 METH_VARARGS,
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1175 start_new_doc},
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diff changeset
1176 {"allocate_lock", (PyCFunction)thread_PyThread_allocate_lock,
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diff changeset
1177 METH_NOARGS, allocate_doc},
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diff changeset
1178 {"allocate", (PyCFunction)thread_PyThread_allocate_lock,
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diff changeset
1179 METH_NOARGS, allocate_doc},
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diff changeset
1180 {"exit_thread", (PyCFunction)thread_PyThread_exit_thread,
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diff changeset
1181 METH_NOARGS, exit_doc},
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diff changeset
1182 {"exit", (PyCFunction)thread_PyThread_exit_thread,
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diff changeset
1183 METH_NOARGS, exit_doc},
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diff changeset
1184 {"interrupt_main", (PyCFunction)thread_PyThread_interrupt_main,
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diff changeset
1185 METH_NOARGS, interrupt_doc},
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diff changeset
1186 {"get_ident", (PyCFunction)thread_get_ident,
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diff changeset
1187 METH_NOARGS, get_ident_doc},
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diff changeset
1188 {"_count", (PyCFunction)thread__count,
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1189 METH_NOARGS, _count_doc},
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1190 {"stack_size", (PyCFunction)thread_stack_size,
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1191 METH_VARARGS,
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1192 stack_size_doc},
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1193 {NULL, NULL} /* sentinel */
923
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Guido van Rossum <guido@python.org>
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diff changeset
1194 };
72aceed365d4 * Makefile adapted to changes below.
Guido van Rossum <guido@python.org>
parents:
diff changeset
1195
72aceed365d4 * Makefile adapted to changes below.
Guido van Rossum <guido@python.org>
parents:
diff changeset
1196
72aceed365d4 * Makefile adapted to changes below.
Guido van Rossum <guido@python.org>
parents:
diff changeset
1197 /* Initialization function */
72aceed365d4 * Makefile adapted to changes below.
Guido van Rossum <guido@python.org>
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1198
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 22865
diff changeset
1199 PyDoc_STRVAR(thread_doc,
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diff changeset
1200 "This module provides primitive operations to write multi-threaded programs.\n\
23832
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Martin v. Löwis <martin@v.loewis.de>
parents: 22865
diff changeset
1201 The 'threading' module provides a more convenient interface.");
8562
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1202
23832
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Martin v. Löwis <martin@v.loewis.de>
parents: 22865
diff changeset
1203 PyDoc_STRVAR(lock_doc,
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Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1204 "A lock object is a synchronization primitive. To create a lock,\n\
9679
877d23bd5bdc Thanks to Chris Herborth, the thread primitives now have proper Py*
Guido van Rossum <guido@python.org>
parents: 9588
diff changeset
1205 call the PyThread_allocate_lock() function. Methods are:\n\
8562
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1206 \n\
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1207 acquire() -- lock the lock, possibly blocking until it can be obtained\n\
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1208 release() -- unlock of the lock\n\
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1209 locked() -- test whether the lock is currently locked\n\
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1210 \n\
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1211 A lock is not owned by the thread that locked it; another thread may\n\
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1212 unlock it. A thread attempting to lock a lock that it has already locked\n\
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 22865
diff changeset
1213 will block until another thread unlocks it. Deadlocks may ensue.");
8562
ff9adb57b8b5 Added doc strings. Also export LockType from the modoule, and give it
Guido van Rossum <guido@python.org>
parents: 8433
diff changeset
1214
47580
94f64f11fdd0 Implement PEP 3121: new module initialization and finalization API.
Martin v. Löwis <martin@v.loewis.de>
parents: 47285
diff changeset
1215 static struct PyModuleDef threadmodule = {
61466
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1216 PyModuleDef_HEAD_INIT,
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diff changeset
1217 "_thread",
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1218 thread_doc,
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diff changeset
1219 -1,
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1220 thread_methods,
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1221 NULL,
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diff changeset
1222 NULL,
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1223 NULL,
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1224 NULL
47580
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Martin v. Löwis <martin@v.loewis.de>
parents: 47285
diff changeset
1225 };
94f64f11fdd0 Implement PEP 3121: new module initialization and finalization API.
Martin v. Löwis <martin@v.loewis.de>
parents: 47285
diff changeset
1226
94f64f11fdd0 Implement PEP 3121: new module initialization and finalization API.
Martin v. Löwis <martin@v.loewis.de>
parents: 47285
diff changeset
1227
24471
f66b3a3509c7 Excise DL_EXPORT/DL_IMPORT from Modules/*. Required adding a prototype
Mark Hammond <mhammond@skippinet.com.au>
parents: 24280
diff changeset
1228 PyMODINIT_FUNC
47580
94f64f11fdd0 Implement PEP 3121: new module initialization and finalization API.
Martin v. Löwis <martin@v.loewis.de>
parents: 47285
diff changeset
1229 PyInit__thread(void)
923
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Guido van Rossum <guido@python.org>
parents:
diff changeset
1230 {
61466
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diff changeset
1231 PyObject *m, *d, *timeout_max;
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diff changeset
1232
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diff changeset
1233 /* Initialize types: */
63897
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61466
diff changeset
1234 if (PyType_Ready(&localdummytype) < 0)
37156907f359 Issue #3757: thread-local objects now support cyclic garbage collection.
Antoine Pitrou <solipsis@pitrou.net>
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1235 return NULL;
61466
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1236 if (PyType_Ready(&localtype) < 0)
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1237 return NULL;
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1238 if (PyType_Ready(&Locktype) < 0)
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diff changeset
1239 return NULL;
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1240 if (PyType_Ready(&RLocktype) < 0)
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1241 return NULL;
923
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Guido van Rossum <guido@python.org>
parents:
diff changeset
1242
61466
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diff changeset
1243 /* Create the module and add the functions */
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diff changeset
1244 m = PyModule_Create(&threadmodule);
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diff changeset
1245 if (m == NULL)
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1246 return NULL;
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Guido van Rossum <guido@python.org>
parents:
diff changeset
1247
61466
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diff changeset
1248 timeout_max = PyFloat_FromDouble(PY_TIMEOUT_MAX / 1000000);
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1249 if (!timeout_max)
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1250 return NULL;
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diff changeset
1251 if (PyModule_AddObject(m, "TIMEOUT_MAX", timeout_max) < 0)
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diff changeset
1252 return NULL;
60598
01d1fd775d16 Issue #7316: the acquire() method of lock objects in the :mod:`threading`
Antoine Pitrou <solipsis@pitrou.net>
parents: 59316
diff changeset
1253
61466
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diff changeset
1254 /* Add a symbolic constant */
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diff changeset
1255 d = PyModule_GetDict(m);
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diff changeset
1256 ThreadError = PyErr_NewException("_thread.error", NULL, NULL);
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diff changeset
1257 PyDict_SetItemString(d, "error", ThreadError);
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diff changeset
1258 Locktype.tp_doc = lock_doc;
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diff changeset
1259 Py_INCREF(&Locktype);
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1260 PyDict_SetItemString(d, "LockType", (PyObject *)&Locktype);
923
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1261
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1262 Py_INCREF(&RLocktype);
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diff changeset
1263 if (PyModule_AddObject(m, "RLock", (PyObject *)&RLocktype) < 0)
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parents: 60598
diff changeset
1264 return NULL;
57172
6d91aaadddd0 Issue #3001: Add a C implementation of recursive locks which is used by
Antoine Pitrou <solipsis@pitrou.net>
parents: 56992
diff changeset
1265
61466
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1266 Py_INCREF(&localtype);
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diff changeset
1267 if (PyModule_AddObject(m, "_local", (PyObject *)&localtype) < 0)
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diff changeset
1268 return NULL;
32673
97768d87394a Implemented thread-local data as proposed on python-dev:
Jim Fulton <jim@zope.com>
parents: 31797
diff changeset
1269
61466
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diff changeset
1270 nb_threads = 0;
56981
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diff changeset
1271
64298
0265d5f7bd07 Issue #1868: Eliminate subtle timing issues in thread-local objects by
Antoine Pitrou <solipsis@pitrou.net>
parents: 64076
diff changeset
1272 str_dict = PyUnicode_InternFromString("__dict__");
0265d5f7bd07 Issue #1868: Eliminate subtle timing issues in thread-local objects by
Antoine Pitrou <solipsis@pitrou.net>
parents: 64076
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1273 if (str_dict == NULL)
0265d5f7bd07 Issue #1868: Eliminate subtle timing issues in thread-local objects by
Antoine Pitrou <solipsis@pitrou.net>
parents: 64076
diff changeset
1274 return NULL;
0265d5f7bd07 Issue #1868: Eliminate subtle timing issues in thread-local objects by
Antoine Pitrou <solipsis@pitrou.net>
parents: 64076
diff changeset
1275
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1276 /* Initialize the C thread library */
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diff changeset
1277 PyThread_init_thread();
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diff changeset
1278 return m;
923
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Guido van Rossum <guido@python.org>
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diff changeset
1279 }