Mercurial > cpython-lru_cache-weakref
annotate Modules/threadmodule.c @ 39496:352ffe77b71d legacy-trunk
Patch #1535500: fix segfault in BZ2File.writelines and make sure it
raises the correct exceptions.
| author | Georg Brandl <georg@python.org> |
|---|---|
| date | Mon, 14 Aug 2006 21:42:55 +0000 |
| parents | a714f2f13e25 |
| children | c58d1b969843 |
| rev | line source |
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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 |
| 4751 | 5 #include "Python.h" |
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6 |
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7 #ifndef WITH_THREAD |
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8 #error "Error! The rest of Python is not compiled with thread support." |
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9 #error "Rerun configure, adding a --with-threads option." |
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10 #error "Then run `make clean' followed by `make'." |
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11 #endif |
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12 |
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13 #include "pythread.h" |
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14 |
| 4751 | 15 static PyObject *ThreadError; |
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16 |
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17 |
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18 /* Lock objects */ |
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19 |
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20 typedef struct { |
| 4751 | 21 PyObject_HEAD |
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22 PyThread_type_lock lock_lock; |
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23 } lockobject; |
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24 |
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25 static void |
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26 lock_dealloc(lockobject *self) |
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27 { |
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28 /* Unlock the lock so it's safe to free it */ |
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29 PyThread_acquire_lock(self->lock_lock, 0); |
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30 PyThread_release_lock(self->lock_lock); |
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31 |
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32 PyThread_free_lock(self->lock_lock); |
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33 PyObject_Del(self); |
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34 } |
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| 4751 | 36 static PyObject * |
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37 lock_PyThread_acquire_lock(lockobject *self, PyObject *args) |
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38 { |
| 22709 | 39 int i = 1; |
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40 |
| 22709 | 41 if (!PyArg_ParseTuple(args, "|i:acquire", &i)) |
| 42 return NULL; | |
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43 |
| 4751 | 44 Py_BEGIN_ALLOW_THREADS |
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45 i = PyThread_acquire_lock(self->lock_lock, i); |
| 4751 | 46 Py_END_ALLOW_THREADS |
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47 |
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48 return PyBool_FromLong((long)i); |
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49 } |
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50 |
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51 PyDoc_STRVAR(acquire_doc, |
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52 "acquire([wait]) -> None or bool\n\ |
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53 (acquire_lock() is an obsolete synonym)\n\ |
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54 \n\ |
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55 Lock the lock. Without argument, this blocks if the lock is already\n\ |
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56 locked (even by the same thread), waiting for another thread to release\n\ |
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57 the lock, and return None once the lock is acquired.\n\ |
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58 With an argument, this will only block if the argument is true,\n\ |
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59 and the return value reflects whether the lock is acquired.\n\ |
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60 The blocking operation is not interruptible."); |
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61 |
| 4751 | 62 static PyObject * |
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63 lock_PyThread_release_lock(lockobject *self) |
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64 { |
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65 /* Sanity check: the lock must be locked */ |
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66 if (PyThread_acquire_lock(self->lock_lock, 0)) { |
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67 PyThread_release_lock(self->lock_lock); |
| 4751 | 68 PyErr_SetString(ThreadError, "release unlocked lock"); |
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69 return NULL; |
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70 } |
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71 |
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72 PyThread_release_lock(self->lock_lock); |
| 4751 | 73 Py_INCREF(Py_None); |
| 74 return Py_None; | |
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75 } |
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76 |
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77 PyDoc_STRVAR(release_doc, |
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78 "release()\n\ |
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79 (release_lock() is an obsolete synonym)\n\ |
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80 \n\ |
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81 Release the lock, allowing another thread that is blocked waiting for\n\ |
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82 the lock to acquire the lock. The lock must be in the locked state,\n\ |
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83 but it needn't be locked by the same thread that unlocks it."); |
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84 |
| 4751 | 85 static PyObject * |
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86 lock_locked_lock(lockobject *self) |
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87 { |
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88 if (PyThread_acquire_lock(self->lock_lock, 0)) { |
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89 PyThread_release_lock(self->lock_lock); |
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90 return PyBool_FromLong(0L); |
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91 } |
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92 return PyBool_FromLong(1L); |
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93 } |
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94 |
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95 PyDoc_STRVAR(locked_doc, |
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96 "locked() -> bool\n\ |
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97 (locked_lock() is an obsolete synonym)\n\ |
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98 \n\ |
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99 Return whether the lock is in the locked state."); |
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100 |
| 4751 | 101 static PyMethodDef lock_methods[] = { |
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102 {"acquire_lock", (PyCFunction)lock_PyThread_acquire_lock, |
| 22709 | 103 METH_VARARGS, acquire_doc}, |
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104 {"acquire", (PyCFunction)lock_PyThread_acquire_lock, |
| 22709 | 105 METH_VARARGS, acquire_doc}, |
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106 {"release_lock", (PyCFunction)lock_PyThread_release_lock, |
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107 METH_NOARGS, release_doc}, |
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108 {"release", (PyCFunction)lock_PyThread_release_lock, |
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109 METH_NOARGS, release_doc}, |
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110 {"locked_lock", (PyCFunction)lock_locked_lock, |
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111 METH_NOARGS, locked_doc}, |
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112 {"locked", (PyCFunction)lock_locked_lock, |
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113 METH_NOARGS, locked_doc}, |
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114 {"__enter__", (PyCFunction)lock_PyThread_acquire_lock, |
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115 METH_VARARGS, acquire_doc}, |
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116 {"__exit__", (PyCFunction)lock_PyThread_release_lock, |
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117 METH_VARARGS, release_doc}, |
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118 {NULL, NULL} /* sentinel */ |
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119 }; |
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120 |
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122 lock_getattr(lockobject *self, char *name) |
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123 { |
| 4751 | 124 return Py_FindMethod(lock_methods, (PyObject *)self, name); |
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125 } |
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126 |
| 4751 | 127 static PyTypeObject Locktype = { |
| 128 PyObject_HEAD_INIT(&PyType_Type) | |
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129 0, /*ob_size*/ |
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130 "thread.lock", /*tp_name*/ |
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131 sizeof(lockobject), /*tp_size*/ |
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132 0, /*tp_itemsize*/ |
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133 /* methods */ |
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134 (destructor)lock_dealloc, /*tp_dealloc*/ |
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135 0, /*tp_print*/ |
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136 (getattrfunc)lock_getattr, /*tp_getattr*/ |
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137 0, /*tp_setattr*/ |
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138 0, /*tp_compare*/ |
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139 0, /*tp_repr*/ |
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140 }; |
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141 |
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142 static lockobject * |
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143 newlockobject(void) |
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144 { |
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145 lockobject *self; |
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146 self = PyObject_New(lockobject, &Locktype); |
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147 if (self == NULL) |
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148 return NULL; |
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149 self->lock_lock = PyThread_allocate_lock(); |
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150 if (self->lock_lock == NULL) { |
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151 PyObject_Del(self); |
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152 self = NULL; |
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153 PyErr_SetString(ThreadError, "can't allocate lock"); |
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154 } |
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155 return self; |
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156 } |
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157 |
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158 /* Thread-local objects */ |
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159 |
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160 #include "structmember.h" |
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161 |
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162 typedef struct { |
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163 PyObject_HEAD |
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164 PyObject *key; |
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165 PyObject *args; |
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166 PyObject *kw; |
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167 PyObject *dict; |
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168 } localobject; |
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169 |
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170 static PyObject * |
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171 local_new(PyTypeObject *type, PyObject *args, PyObject *kw) |
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172 { |
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173 localobject *self; |
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174 PyObject *tdict; |
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175 |
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176 if (type->tp_init == PyBaseObject_Type.tp_init |
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177 && ((args && PyObject_IsTrue(args)) |
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178 || (kw && PyObject_IsTrue(kw)))) { |
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179 PyErr_SetString(PyExc_TypeError, |
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180 "Initialization arguments are not supported"); |
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181 return NULL; |
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182 } |
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183 |
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184 self = (localobject *)type->tp_alloc(type, 0); |
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185 if (self == NULL) |
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186 return NULL; |
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187 |
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188 Py_XINCREF(args); |
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189 self->args = args; |
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190 Py_XINCREF(kw); |
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191 self->kw = kw; |
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192 self->dict = NULL; /* making sure */ |
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193 self->key = PyString_FromFormat("thread.local.%p", self); |
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194 if (self->key == NULL) |
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195 goto err; |
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196 |
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197 self->dict = PyDict_New(); |
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198 if (self->dict == NULL) |
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199 goto err; |
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200 |
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201 tdict = PyThreadState_GetDict(); |
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202 if (tdict == NULL) { |
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203 PyErr_SetString(PyExc_SystemError, |
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204 "Couldn't get thread-state dictionary"); |
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205 goto err; |
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206 } |
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207 |
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208 if (PyDict_SetItem(tdict, self->key, self->dict) < 0) |
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209 goto err; |
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210 |
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211 return (PyObject *)self; |
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212 |
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213 err: |
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214 Py_DECREF(self); |
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215 return NULL; |
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216 } |
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217 |
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218 static int |
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219 local_traverse(localobject *self, visitproc visit, void *arg) |
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220 { |
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221 Py_VISIT(self->args); |
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222 Py_VISIT(self->kw); |
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223 Py_VISIT(self->dict); |
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224 return 0; |
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225 } |
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226 |
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227 static int |
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228 local_clear(localobject *self) |
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229 { |
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230 Py_CLEAR(self->key); |
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231 Py_CLEAR(self->args); |
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232 Py_CLEAR(self->kw); |
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233 Py_CLEAR(self->dict); |
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234 return 0; |
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235 } |
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236 |
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237 static void |
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238 local_dealloc(localobject *self) |
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239 { |
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240 PyThreadState *tstate; |
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241 if (self->key |
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242 && (tstate = PyThreadState_Get()) |
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243 && tstate->interp) { |
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244 for(tstate = PyInterpreterState_ThreadHead(tstate->interp); |
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245 tstate; |
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246 tstate = PyThreadState_Next(tstate)) |
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247 if (tstate->dict && |
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248 PyDict_GetItem(tstate->dict, self->key)) |
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249 PyDict_DelItem(tstate->dict, self->key); |
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250 } |
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251 |
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252 local_clear(self); |
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253 self->ob_type->tp_free((PyObject*)self); |
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254 } |
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255 |
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256 static PyObject * |
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257 _ldict(localobject *self) |
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258 { |
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259 PyObject *tdict, *ldict; |
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260 |
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261 tdict = PyThreadState_GetDict(); |
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262 if (tdict == NULL) { |
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263 PyErr_SetString(PyExc_SystemError, |
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264 "Couldn't get thread-state dictionary"); |
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265 return NULL; |
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266 } |
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267 |
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268 ldict = PyDict_GetItem(tdict, self->key); |
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269 if (ldict == NULL) { |
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270 ldict = PyDict_New(); /* we own ldict */ |
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271 |
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272 if (ldict == NULL) |
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273 return NULL; |
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274 else { |
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275 int i = PyDict_SetItem(tdict, self->key, ldict); |
| 36895 | 276 Py_DECREF(ldict); /* now ldict is borrowed */ |
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277 if (i < 0) |
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278 return NULL; |
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279 } |
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280 |
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281 Py_CLEAR(self->dict); |
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282 Py_INCREF(ldict); |
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283 self->dict = ldict; /* still borrowed */ |
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284 |
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285 if (self->ob_type->tp_init != PyBaseObject_Type.tp_init && |
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286 self->ob_type->tp_init((PyObject*)self, |
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287 self->args, self->kw) < 0) { |
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288 /* we need to get rid of ldict from thread so |
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289 we create a new one the next time we do an attr |
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290 acces */ |
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291 PyDict_DelItem(tdict, self->key); |
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292 return NULL; |
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293 } |
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294 |
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295 } |
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296 else if (self->dict != ldict) { |
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297 Py_CLEAR(self->dict); |
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298 Py_INCREF(ldict); |
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299 self->dict = ldict; |
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300 } |
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301 |
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302 return ldict; |
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303 } |
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304 |
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305 static int |
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306 local_setattro(localobject *self, PyObject *name, PyObject *v) |
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307 { |
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308 PyObject *ldict; |
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309 |
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310 ldict = _ldict(self); |
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311 if (ldict == NULL) |
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312 return -1; |
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313 |
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314 return PyObject_GenericSetAttr((PyObject *)self, name, v); |
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315 } |
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316 |
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317 static PyObject * |
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318 local_getdict(localobject *self, void *closure) |
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319 { |
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320 if (self->dict == NULL) { |
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321 PyErr_SetString(PyExc_AttributeError, "__dict__"); |
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322 return NULL; |
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323 } |
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324 |
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325 Py_INCREF(self->dict); |
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326 return self->dict; |
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327 } |
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328 |
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329 static PyGetSetDef local_getset[] = { |
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330 {"__dict__", (getter)local_getdict, (setter)NULL, |
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331 "Local-data dictionary", NULL}, |
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332 {NULL} /* Sentinel */ |
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333 }; |
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334 |
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335 static PyObject *local_getattro(localobject *, PyObject *); |
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336 |
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337 static PyTypeObject localtype = { |
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338 PyObject_HEAD_INIT(NULL) |
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339 /* ob_size */ 0, |
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340 /* tp_name */ "thread._local", |
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341 /* tp_basicsize */ sizeof(localobject), |
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342 /* tp_itemsize */ 0, |
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343 /* tp_dealloc */ (destructor)local_dealloc, |
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344 /* tp_print */ 0, |
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345 /* tp_getattr */ 0, |
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346 /* tp_setattr */ 0, |
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347 /* tp_compare */ 0, |
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348 /* tp_repr */ 0, |
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349 /* tp_as_number */ 0, |
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350 /* tp_as_sequence */ 0, |
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351 /* tp_as_mapping */ 0, |
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352 /* tp_hash */ 0, |
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353 /* tp_call */ 0, |
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354 /* tp_str */ 0, |
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355 /* tp_getattro */ (getattrofunc)local_getattro, |
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356 /* tp_setattro */ (setattrofunc)local_setattro, |
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357 /* tp_as_buffer */ 0, |
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358 /* tp_flags */ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, |
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359 /* tp_doc */ "Thread-local data", |
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360 /* tp_traverse */ (traverseproc)local_traverse, |
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361 /* tp_clear */ (inquiry)local_clear, |
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362 /* tp_richcompare */ 0, |
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363 /* tp_weaklistoffset */ 0, |
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364 /* tp_iter */ 0, |
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365 /* tp_iternext */ 0, |
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366 /* tp_methods */ 0, |
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367 /* tp_members */ 0, |
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368 /* tp_getset */ local_getset, |
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369 /* tp_base */ 0, |
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370 /* tp_dict */ 0, /* internal use */ |
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371 /* tp_descr_get */ 0, |
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372 /* tp_descr_set */ 0, |
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373 /* tp_dictoffset */ offsetof(localobject, dict), |
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374 /* tp_init */ 0, |
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375 /* tp_alloc */ 0, |
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376 /* tp_new */ local_new, |
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377 /* tp_free */ 0, /* Low-level free-mem routine */ |
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378 /* tp_is_gc */ 0, /* For PyObject_IS_GC */ |
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379 }; |
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380 |
|
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381 static PyObject * |
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382 local_getattro(localobject *self, PyObject *name) |
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383 { |
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384 PyObject *ldict, *value; |
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385 |
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386 ldict = _ldict(self); |
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387 if (ldict == NULL) |
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388 return NULL; |
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389 |
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390 if (self->ob_type != &localtype) |
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391 /* use generic lookup for subtypes */ |
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392 return PyObject_GenericGetAttr((PyObject *)self, name); |
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393 |
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394 /* Optimization: just look in dict ourselves */ |
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395 value = PyDict_GetItem(ldict, name); |
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396 if (value == NULL) |
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397 /* Fall back on generic to get __class__ and __dict__ */ |
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398 return PyObject_GenericGetAttr((PyObject *)self, name); |
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399 |
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400 Py_INCREF(value); |
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401 return value; |
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402 } |
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403 |
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404 /* Module functions */ |
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405 |
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406 struct bootstate { |
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407 PyInterpreterState *interp; |
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408 PyObject *func; |
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409 PyObject *args; |
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410 PyObject *keyw; |
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411 }; |
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412 |
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413 static void |
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414 t_bootstrap(void *boot_raw) |
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415 { |
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416 struct bootstate *boot = (struct bootstate *) boot_raw; |
| 35117 | 417 PyThreadState *tstate; |
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418 PyObject *res; |
|
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419 |
| 35117 | 420 tstate = PyThreadState_New(boot->interp); |
| 421 | |
| 422 PyEval_AcquireThread(tstate); | |
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423 res = PyEval_CallObjectWithKeywords( |
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424 boot->func, boot->args, boot->keyw); |
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425 if (res == NULL) { |
|
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426 if (PyErr_ExceptionMatches(PyExc_SystemExit)) |
| 4751 | 427 PyErr_Clear(); |
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428 else { |
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429 PyObject *file; |
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430 PySys_WriteStderr( |
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431 "Unhandled exception in thread started by "); |
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432 file = PySys_GetObject("stderr"); |
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433 if (file) |
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434 PyFile_WriteObject(boot->func, file, 0); |
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435 else |
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436 PyObject_Print(boot->func, stderr, 0); |
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437 PySys_WriteStderr("\n"); |
|
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438 PyErr_PrintEx(0); |
|
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439 } |
|
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440 } |
|
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441 else |
| 4751 | 442 Py_DECREF(res); |
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443 Py_DECREF(boot->func); |
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444 Py_DECREF(boot->args); |
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445 Py_XDECREF(boot->keyw); |
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446 PyMem_DEL(boot_raw); |
| 35117 | 447 PyThreadState_Clear(tstate); |
| 448 PyThreadState_DeleteCurrent(); | |
|
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449 PyThread_exit_thread(); |
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450 } |
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451 |
| 4751 | 452 static PyObject * |
|
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453 thread_PyThread_start_new_thread(PyObject *self, PyObject *fargs) |
|
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454 { |
|
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455 PyObject *func, *args, *keyw = NULL; |
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456 struct bootstate *boot; |
|
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457 long ident; |
|
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|
458 |
|
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459 if (!PyArg_UnpackTuple(fargs, "start_new_thread", 2, 3, |
|
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460 &func, &args, &keyw)) |
|
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461 return NULL; |
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462 if (!PyCallable_Check(func)) { |
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463 PyErr_SetString(PyExc_TypeError, |
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464 "first arg must be callable"); |
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465 return NULL; |
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466 } |
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467 if (!PyTuple_Check(args)) { |
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468 PyErr_SetString(PyExc_TypeError, |
|
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469 "2nd arg must be a tuple"); |
|
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470 return NULL; |
|
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471 } |
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472 if (keyw != NULL && !PyDict_Check(keyw)) { |
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473 PyErr_SetString(PyExc_TypeError, |
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474 "optional 3rd arg must be a dictionary"); |
|
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475 return NULL; |
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476 } |
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477 boot = PyMem_NEW(struct bootstate, 1); |
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478 if (boot == NULL) |
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|
479 return PyErr_NoMemory(); |
|
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Nicholas Bastin <nick.bastin@gmail.com>
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|
480 boot->interp = PyThreadState_GET()->interp; |
|
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481 boot->func = func; |
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482 boot->args = args; |
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483 boot->keyw = keyw; |
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484 Py_INCREF(func); |
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485 Py_INCREF(args); |
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486 Py_XINCREF(keyw); |
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487 PyEval_InitThreads(); /* Start the interpreter's thread-awareness */ |
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488 ident = PyThread_start_new_thread(t_bootstrap, (void*) boot); |
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489 if (ident == -1) { |
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490 PyErr_SetString(ThreadError, "can't start new thread"); |
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491 Py_DECREF(func); |
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492 Py_DECREF(args); |
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493 Py_XDECREF(keyw); |
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494 PyMem_DEL(boot); |
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495 return NULL; |
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496 } |
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497 return PyInt_FromLong(ident); |
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498 } |
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499 |
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500 PyDoc_STRVAR(start_new_doc, |
| 20266 | 501 "start_new_thread(function, args[, kwargs])\n\ |
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502 (start_new() is an obsolete synonym)\n\ |
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503 \n\ |
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504 Start a new thread and return its identifier. The thread will call the\n\ |
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505 function with positional arguments from the tuple args and keyword arguments\n\ |
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506 taken from the optional dictionary kwargs. The thread exits when the\n\ |
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507 function returns; the return value is ignored. The thread will also exit\n\ |
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508 when the function raises an unhandled exception; a stack trace will be\n\ |
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509 printed unless the exception is SystemExit.\n"); |
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510 |
| 4751 | 511 static PyObject * |
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512 thread_PyThread_exit_thread(PyObject *self) |
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513 { |
| 4751 | 514 PyErr_SetNone(PyExc_SystemExit); |
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515 return NULL; |
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516 } |
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517 |
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518 PyDoc_STRVAR(exit_doc, |
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519 "exit()\n\ |
|
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520 (PyThread_exit_thread() is an obsolete synonym)\n\ |
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521 \n\ |
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522 This is synonymous to ``raise SystemExit''. It will cause the current\n\ |
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523 thread to exit silently unless the exception is caught."); |
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524 |
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Add interrupt_main() to thread module.
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525 static PyObject * |
| 29498 | 526 thread_PyThread_interrupt_main(PyObject * self) |
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527 { |
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528 PyErr_SetInterrupt(); |
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529 Py_INCREF(Py_None); |
|
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530 return Py_None; |
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|
531 } |
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532 |
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533 PyDoc_STRVAR(interrupt_doc, |
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534 "interrupt_main()\n\ |
|
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535 \n\ |
|
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536 Raise a KeyboardInterrupt in the main thread.\n\ |
| 29498 | 537 A subthread can use this function to interrupt the main thread." |
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538 ); |
|
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539 |
|
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540 #ifndef NO_EXIT_PROG |
| 4751 | 541 static PyObject * |
|
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ANSI-fication
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542 thread_PyThread_exit_prog(PyObject *self, PyObject *args) |
|
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543 { |
|
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544 int sts; |
| 22709 | 545 if (!PyArg_ParseTuple(args, "i:exit_prog", &sts)) |
|
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546 return NULL; |
|
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547 Py_Exit(sts); /* Calls PyThread_exit_prog(sts) or _PyThread_exit_prog(sts) */ |
|
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548 for (;;) { } /* Should not be reached */ |
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549 } |
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550 #endif |
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551 |
|
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remove forward declarations, move constructor functions. makes code C++ safe.
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|
552 static lockobject *newlockobject(void); |
|
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parents:
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|
553 |
| 4751 | 554 static PyObject * |
|
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|
555 thread_PyThread_allocate_lock(PyObject *self) |
|
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changeset
|
556 { |
| 4751 | 557 return (PyObject *) newlockobject(); |
|
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|
558 } |
|
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|
559 |
|
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Martin v. Löwis <martin@v.loewis.de>
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|
560 PyDoc_STRVAR(allocate_doc, |
|
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|
561 "allocate_lock() -> lock object\n\ |
|
ff9adb57b8b5
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parents:
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|
562 (allocate() is an obsolete synonym)\n\ |
|
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|
563 \n\ |
|
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Martin v. Löwis <martin@v.loewis.de>
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changeset
|
564 Create a new lock object. See LockType.__doc__ for information about locks."); |
|
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parents:
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|
565 |
| 4751 | 566 static PyObject * |
|
22561
043ad7adc896
Remove many uses of PyArg_NoArgs macro, change METH_OLDARGS to METH_NOARGS.
Neal Norwitz <nnorwitz@gmail.com>
parents:
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changeset
|
567 thread_get_ident(PyObject *self) |
|
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|
568 { |
|
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diff
changeset
|
569 long ident; |
|
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Thanks to Chris Herborth, the thread primitives now have proper Py*
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|
570 ident = PyThread_get_thread_ident(); |
|
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Guido van Rossum <guido@python.org>
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|
571 if (ident == -1) { |
| 4751 | 572 PyErr_SetString(ThreadError, "no current thread ident"); |
|
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|
573 return NULL; |
|
1940892d2fe3
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|
574 } |
| 4751 | 575 return PyInt_FromLong(ident); |
|
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|
576 } |
|
1940892d2fe3
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|
577 |
|
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|
578 PyDoc_STRVAR(get_ident_doc, |
|
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|
579 "get_ident() -> integer\n\ |
|
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|
580 \n\ |
|
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|
581 Return a non-zero integer that uniquely identifies the current thread\n\ |
|
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|
582 amongst other threads that exist simultaneously.\n\ |
|
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|
583 This may be used to identify per-thread resources.\n\ |
|
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|
584 Even though on some platforms threads identities may appear to be\n\ |
|
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|
585 allocated consecutive numbers starting at 1, this behavior should not\n\ |
|
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|
586 be relied upon, and the number should be seen purely as a magic cookie.\n\ |
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|
587 A thread's identity may be reused for another thread after it exits."); |
|
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|
588 |
|
38794
f7d23bca599f
Patch #1454481: Make thread stack size runtime tunable.
Andrew MacIntyre <andymac@bullseye.apana.org.au>
parents:
38592
diff
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|
589 static PyObject * |
|
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Patch #1454481: Make thread stack size runtime tunable.
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|
590 thread_stack_size(PyObject *self, PyObject *args) |
|
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Patch #1454481: Make thread stack size runtime tunable.
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|
591 { |
|
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Patch #1454481: Make thread stack size runtime tunable.
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|
592 size_t old_size; |
|
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|
593 Py_ssize_t new_size = 0; |
|
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|
594 int rc; |
|
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Patch #1454481: Make thread stack size runtime tunable.
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|
595 |
|
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Patch #1454481: Make thread stack size runtime tunable.
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|
596 if (!PyArg_ParseTuple(args, "|n:stack_size", &new_size)) |
|
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|
597 return NULL; |
|
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changeset
|
598 |
|
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|
599 if (new_size < 0) { |
|
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|
600 PyErr_SetString(PyExc_ValueError, |
|
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Andrew MacIntyre <andymac@bullseye.apana.org.au>
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601 "size must be 0 or a positive value"); |
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602 return NULL; |
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603 } |
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604 |
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605 old_size = PyThread_get_stacksize(); |
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606 |
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607 rc = PyThread_set_stacksize((size_t) new_size); |
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608 if (rc == -1) { |
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609 PyErr_Format(PyExc_ValueError, |
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610 "size not valid: %zd bytes", |
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611 new_size); |
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612 return NULL; |
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613 } |
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614 if (rc == -2) { |
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615 PyErr_SetString(ThreadError, |
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616 "setting stack size not supported"); |
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617 return NULL; |
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618 } |
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619 |
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620 return PyInt_FromSsize_t((Py_ssize_t) old_size); |
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621 } |
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622 |
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623 PyDoc_STRVAR(stack_size_doc, |
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624 "stack_size([size]) -> size\n\ |
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625 \n\ |
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626 Return the thread stack size used when creating new threads. The\n\ |
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627 optional size argument specifies the stack size (in bytes) to be used\n\ |
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628 for subsequently created threads, and must be 0 (use platform or\n\ |
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629 configured default) or a positive integer value of at least 32,768 (32k).\n\ |
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630 If changing the thread stack size is unsupported, a ThreadError\n\ |
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631 exception is raised. If the specified size is invalid, a ValueError\n\ |
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632 exception is raised, and the stack size is unmodified. 32k bytes\n\ |
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633 currently the minimum supported stack size value to guarantee\n\ |
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634 sufficient stack space for the interpreter itself.\n\ |
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635 \n\ |
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636 Note that some platforms may have particular restrictions on values for\n\ |
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637 the stack size, such as requiring a minimum stack size larger than 32kB or\n\ |
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638 requiring allocation in multiples of the system memory page size\n\ |
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639 - platform documentation should be referred to for more information\n\ |
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640 (4kB pages are common; using multiples of 4096 for the stack size is\n\ |
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641 the suggested approach in the absence of more specific information)."); |
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642 |
| 4751 | 643 static PyMethodDef thread_methods[] = { |
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644 {"start_new_thread", (PyCFunction)thread_PyThread_start_new_thread, |
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645 METH_VARARGS, |
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646 start_new_doc}, |
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647 {"start_new", (PyCFunction)thread_PyThread_start_new_thread, |
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648 METH_VARARGS, |
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649 start_new_doc}, |
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650 {"allocate_lock", (PyCFunction)thread_PyThread_allocate_lock, |
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651 METH_NOARGS, allocate_doc}, |
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652 {"allocate", (PyCFunction)thread_PyThread_allocate_lock, |
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653 METH_NOARGS, allocate_doc}, |
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654 {"exit_thread", (PyCFunction)thread_PyThread_exit_thread, |
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655 METH_NOARGS, exit_doc}, |
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656 {"exit", (PyCFunction)thread_PyThread_exit_thread, |
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657 METH_NOARGS, exit_doc}, |
| 29498 | 658 {"interrupt_main", (PyCFunction)thread_PyThread_interrupt_main, |
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659 METH_NOARGS, interrupt_doc}, |
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660 {"get_ident", (PyCFunction)thread_get_ident, |
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661 METH_NOARGS, get_ident_doc}, |
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662 {"stack_size", (PyCFunction)thread_stack_size, |
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663 METH_VARARGS, |
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664 stack_size_doc}, |
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665 #ifndef NO_EXIT_PROG |
| 22709 | 666 {"exit_prog", (PyCFunction)thread_PyThread_exit_prog, |
| 667 METH_VARARGS}, | |
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668 #endif |
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669 {NULL, NULL} /* sentinel */ |
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670 }; |
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671 |
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672 |
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673 /* Initialization function */ |
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674 |
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675 PyDoc_STRVAR(thread_doc, |
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676 "This module provides primitive operations to write multi-threaded programs.\n\ |
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677 The 'threading' module provides a more convenient interface."); |
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678 |
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679 PyDoc_STRVAR(lock_doc, |
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680 "A lock object is a synchronization primitive. To create a lock,\n\ |
|
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681 call the PyThread_allocate_lock() function. Methods are:\n\ |
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682 \n\ |
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683 acquire() -- lock the lock, possibly blocking until it can be obtained\n\ |
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684 release() -- unlock of the lock\n\ |
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685 locked() -- test whether the lock is currently locked\n\ |
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686 \n\ |
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687 A lock is not owned by the thread that locked it; another thread may\n\ |
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688 unlock it. A thread attempting to lock a lock that it has already locked\n\ |
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689 will block until another thread unlocks it. Deadlocks may ensue."); |
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690 |
|
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691 PyMODINIT_FUNC |
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692 initthread(void) |
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693 { |
| 4751 | 694 PyObject *m, *d; |
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695 |
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696 /* Initialize types: */ |
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697 if (PyType_Ready(&localtype) < 0) |
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698 return; |
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699 |
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700 /* Create the module and add the functions */ |
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701 m = Py_InitModule3("thread", thread_methods, thread_doc); |
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702 if (m == NULL) |
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703 return; |
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704 |
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705 /* Add a symbolic constant */ |
| 4751 | 706 d = PyModule_GetDict(m); |
|
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Apply two changes, systematically:
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707 ThreadError = PyErr_NewException("thread.error", NULL, NULL); |
| 4751 | 708 PyDict_SetItemString(d, "error", ThreadError); |
|
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709 Locktype.tp_doc = lock_doc; |
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710 Py_INCREF(&Locktype); |
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711 PyDict_SetItemString(d, "LockType", (PyObject *)&Locktype); |
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712 |
| 35085 | 713 Py_INCREF(&localtype); |
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714 if (PyModule_AddObject(m, "_local", (PyObject *)&localtype) < 0) |
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715 return; |
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716 |
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717 /* Initialize the C thread library */ |
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718 PyThread_init_thread(); |
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719 } |
