Mercurial > cpython-lru_cache-weakref

annotate Modules/_weakref.c @ 17581:c1937faabb23 2.1

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Added support for optional explanation parameter to the \versionadded macro. Refactored do_cmd_versionadded() and do_cmd_versionchanged() to do most of the work in a helper function, with the do_cmd_*() wrappers just supplying a portion of the replacement text.
author Fred Drake <fdrake@acm.org>
date Wed, 18 Apr 2001 17:29:14 +0000
parents 6a3776201750
children 8d9eb5a4ebcd
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #include "Python.h"
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2 #include "structmember.h"
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3
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4
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5 typedef struct _PyWeakReference PyWeakReference;
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6
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7 struct _PyWeakReference {
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8 PyObject_HEAD
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9 PyObject *wr_object;
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10 PyObject *wr_callback;
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11 long hash;
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12 PyWeakReference *wr_prev;
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13 PyWeakReference *wr_next;
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14 };
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15
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16
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17 #define GET_WEAKREFS_LISTPTR(o) \
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18 ((PyWeakReference **) PyObject_GET_WEAKREFS_LISTPTR(o))
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19
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20 static PyObject *
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21 ReferenceError;
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22
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23 static PyWeakReference *
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24 free_list = NULL;
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25
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26 staticforward PyTypeObject
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27 PyWeakReference_Type;
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28
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29 static PyWeakReference *
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30 new_weakref(void)
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31 {
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32 PyWeakReference *result;
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33
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34 if (free_list != NULL) {
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35 result = free_list;
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36 free_list = result->wr_next;
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37 result->ob_type = &PyWeakReference_Type;
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38 _Py_NewReference((PyObject *)result);
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39 }
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40 else {
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41 result = PyObject_NEW(PyWeakReference, &PyWeakReference_Type);
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42 }
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43 if (result)
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44 result->hash = -1;
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45 return result;
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46 }
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47
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48
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49 /* This function clears the passed-in reference and removes it from the
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50 * list of weak references for the referent. This is the only code that
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51 * removes an item from the doubly-linked list of weak references for an
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52 * object; it is also responsible for clearing the callback slot.
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53 */
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54 static void
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55 clear_weakref(PyWeakReference *self)
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56 {
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57 PyObject *callback = self->wr_callback;
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58
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59 if (self->wr_object != Py_None) {
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60 PyWeakReference **list = GET_WEAKREFS_LISTPTR(self->wr_object);
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61
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62 if (*list == self)
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63 *list = self->wr_next;
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64 self->wr_object = Py_None;
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65 self->wr_callback = NULL;
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66 if (self->wr_prev != NULL)
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67 self->wr_prev->wr_next = self->wr_next;
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68 if (self->wr_next != NULL)
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69 self->wr_next->wr_prev = self->wr_prev;
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70 self->wr_prev = NULL;
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71 self->wr_next = NULL;
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72 Py_XDECREF(callback);
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73 }
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74 }
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75
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76
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77 static void
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78 weakref_dealloc(PyWeakReference *self)
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79 {
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80 clear_weakref(self);
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81 PyObject_GC_Fini((PyObject *)self);
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82 self->wr_next = free_list;
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83 free_list = self;
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84 }
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85
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86
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87 static int
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88 gc_traverse(PyWeakReference *self, visitproc visit, void *arg)
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89 {
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90 if (self->wr_callback != NULL)
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91 return visit(self->wr_callback, arg);
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92 return 0;
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93 }
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94
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95
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96 static int
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97 gc_clear(PyWeakReference *self)
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98 {
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99 clear_weakref(self);
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100 return 0;
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101 }
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102
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103
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104 static PyObject *
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105 weakref_call(PyWeakReference *self, PyObject *args, PyObject *kw)
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106 {
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107 static char *argnames[] = {NULL};
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108
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109 if (PyArg_ParseTupleAndKeywords(args, kw, ":__call__", argnames)) {
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110 PyObject *object = self->wr_object;
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111 Py_INCREF(object);
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112 return (object);
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113 }
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114 return NULL;
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115 }
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116
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117
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118 static long
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119 weakref_hash(PyWeakReference *self)
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120 {
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121 if (self->hash != -1)
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122 return self->hash;
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123 if (self->wr_object == Py_None) {
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124 PyErr_SetString(PyExc_TypeError, "weak object has gone away");
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125 return -1;
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126 }
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127 self->hash = PyObject_Hash(self->wr_object);
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128 return self->hash;
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129 }
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130
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131
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132 static PyObject *
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133 weakref_repr(PyWeakReference *self)
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134 {
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135 char buffer[256];
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136 if (self->wr_object == Py_None) {
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137 sprintf(buffer, "<weakref at %lx; dead>",
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138 (long)(self));
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139 }
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140 else {
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141 sprintf(buffer, "<weakref at %#lx; to '%s' at %#lx>",
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142 (long)(self), self->wr_object->ob_type->tp_name,
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143 (long)(self->wr_object));
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144 }
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145 return PyString_FromString(buffer);
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146 }
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147
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148 /* Weak references only support equality, not ordering. Two weak references
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149 are equal if the underlying objects are equal. If the underlying object has
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150 gone away, they are equal if they are identical. */
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151
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152 static PyObject *
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153 weakref_richcompare(PyWeakReference* self, PyWeakReference* other, int op)
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154 {
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155 if (op != Py_EQ || self->ob_type != other->ob_type) {
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156 Py_INCREF(Py_NotImplemented);
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157 return Py_NotImplemented;
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158 }
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159 if (self->wr_object == Py_None || other->wr_object == Py_None) {
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160 PyObject *res = self==other ? Py_True : Py_False;
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161 Py_INCREF(res);
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162 return res;
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163 }
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164 return PyObject_RichCompare(self->wr_object, other->wr_object, op);
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165 }
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166
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167
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168 statichere PyTypeObject
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169 PyWeakReference_Type = {
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170 PyObject_HEAD_INIT(NULL)
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171 0,
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172 "weakref",
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173 sizeof(PyWeakReference) + PyGC_HEAD_SIZE,
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174 0,
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175 (destructor)weakref_dealloc,/*tp_dealloc*/
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176 0, /*tp_print*/
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177 0, /*tp_getattr*/
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178 0, /*tp_setattr*/
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179 0, /*tp_compare*/
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180 (reprfunc)weakref_repr, /*tp_repr*/
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181 0, /*tp_as_number*/
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182 0, /*tp_as_sequence*/
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183 0, /*tp_as_mapping*/
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184 (hashfunc)weakref_hash, /*tp_hash*/
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185 (ternaryfunc)weakref_call, /*tp_call*/
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186 0, /*tp_str*/
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187 0, /*tp_getattro*/
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188 0, /*tp_setattro*/
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189 0, /*tp_as_buffer*/
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190 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_GC | Py_TPFLAGS_HAVE_RICHCOMPARE,
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191 0, /*tp_doc*/
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192 (traverseproc)gc_traverse, /*tp_traverse*/
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193 (inquiry)gc_clear, /*tp_clear*/
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194 (richcmpfunc)weakref_richcompare, /*tp_richcompare*/
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195 0, /*tp_weaklistoffset*/
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196 };
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197
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198
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199 static int
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200 proxy_checkref(PyWeakReference *proxy)
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201 {
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202 if (proxy->wr_object == Py_None) {
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203 PyErr_SetString(ReferenceError,
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204 "weakly-referenced object no longer exists");
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205 return 0;
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206 }
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207 return 1;
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208 }
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209
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210
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211 #define WRAP_UNARY(method, generic) \
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212 static PyObject * \
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213 method(PyWeakReference *proxy) { \
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214 if (!proxy_checkref(proxy)) { \
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215 return NULL; \
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216 } \
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217 return generic(proxy->wr_object); \
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218 }
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219
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220 #define WRAP_BINARY(method, generic) \
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221 static PyObject * \
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222 method(PyWeakReference *proxy, PyObject *v) { \
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223 if (!proxy_checkref(proxy)) { \
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224 return NULL; \
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225 } \
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226 return generic(proxy->wr_object, v); \
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227 }
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228
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229 #define WRAP_TERNARY(method, generic) \
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230 static PyObject * \
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231 method(PyWeakReference *proxy, PyObject *v, PyObject *w) { \
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232 if (!proxy_checkref(proxy)) { \
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233 return NULL; \
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234 } \
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235 return generic(proxy->wr_object, v, w); \
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236 }
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237
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238
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239 /* direct slots */
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240
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241 WRAP_BINARY(proxy_getattr, PyObject_GetAttr)
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242 WRAP_UNARY(proxy_str, PyObject_Str)
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243 WRAP_TERNARY(proxy_call, PyEval_CallObjectWithKeywords)
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244
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245 static int
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246 proxy_print(PyWeakReference *proxy, FILE *fp, int flags)
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247 {
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diff changeset
248 if (!proxy_checkref(proxy))
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249 return -1;
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250 return PyObject_Print(proxy->wr_object, fp, flags);
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251 }
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252
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253 static PyObject *
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254 proxy_repr(PyWeakReference *proxy)
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diff changeset
255 {
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diff changeset
256 char buf[160];
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diff changeset
257 sprintf(buf, "<weakref at %p to %.100s at %p>", proxy,
1fb6672b20ef PEP 205, Weak References -- initial checkin.
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diff changeset
258 proxy->wr_object->ob_type->tp_name, proxy->wr_object);
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diff changeset
259 return PyString_FromString(buf);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
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260 }
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diff changeset
261
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262
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diff changeset
263 static int
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diff changeset
264 proxy_setattr(PyWeakReference *proxy, PyObject *name, PyObject *value)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
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diff changeset
265 {
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parents:
diff changeset
266 if (!proxy_checkref(proxy))
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diff changeset
267 return -1;
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268 return PyObject_SetAttr(proxy->wr_object, name, value);
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269 }
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270
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parents:
diff changeset
271 static int
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diff changeset
272 proxy_compare(PyWeakReference *proxy, PyObject *v)
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parents:
diff changeset
273 {
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parents:
diff changeset
274 if (!proxy_checkref(proxy))
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diff changeset
275 return -1;
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diff changeset
276 return PyObject_Compare(proxy->wr_object, v);
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277 }
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diff changeset
278
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diff changeset
279 /* number slots */
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diff changeset
280 WRAP_BINARY(proxy_add, PyNumber_Add)
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diff changeset
281 WRAP_BINARY(proxy_sub, PyNumber_Subtract)
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diff changeset
282 WRAP_BINARY(proxy_mul, PyNumber_Multiply)
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diff changeset
283 WRAP_BINARY(proxy_div, PyNumber_Divide)
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diff changeset
284 WRAP_BINARY(proxy_mod, PyNumber_Remainder)
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parents:
diff changeset
285 WRAP_BINARY(proxy_divmod, PyNumber_Divmod)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
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parents:
diff changeset
286 WRAP_TERNARY(proxy_pow, PyNumber_Power)
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parents:
diff changeset
287 WRAP_UNARY(proxy_neg, PyNumber_Negative)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
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parents:
diff changeset
288 WRAP_UNARY(proxy_pos, PyNumber_Positive)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
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parents:
diff changeset
289 WRAP_UNARY(proxy_abs, PyNumber_Absolute)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
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parents:
diff changeset
290 WRAP_UNARY(proxy_invert, PyNumber_Invert)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
291 WRAP_BINARY(proxy_lshift, PyNumber_Lshift)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
292 WRAP_BINARY(proxy_rshift, PyNumber_Rshift)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
293 WRAP_BINARY(proxy_and, PyNumber_And)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
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parents:
diff changeset
294 WRAP_BINARY(proxy_xor, PyNumber_Xor)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
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parents:
diff changeset
295 WRAP_BINARY(proxy_or, PyNumber_Or)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
296 WRAP_UNARY(proxy_int, PyNumber_Int)
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parents:
diff changeset
297 WRAP_UNARY(proxy_long, PyNumber_Long)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
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parents:
diff changeset
298 WRAP_UNARY(proxy_float, PyNumber_Float)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
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parents:
diff changeset
299 WRAP_BINARY(proxy_iadd, PyNumber_InPlaceAdd)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
300 WRAP_BINARY(proxy_isub, PyNumber_InPlaceSubtract)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
301 WRAP_BINARY(proxy_imul, PyNumber_InPlaceMultiply)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
302 WRAP_BINARY(proxy_idiv, PyNumber_InPlaceDivide)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
303 WRAP_BINARY(proxy_imod, PyNumber_InPlaceRemainder)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
304 WRAP_TERNARY(proxy_ipow, PyNumber_InPlacePower)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
305 WRAP_BINARY(proxy_ilshift, PyNumber_InPlaceLshift)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
306 WRAP_BINARY(proxy_irshift, PyNumber_InPlaceRshift)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
307 WRAP_BINARY(proxy_iand, PyNumber_InPlaceAnd)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
308 WRAP_BINARY(proxy_ixor, PyNumber_InPlaceXor)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
309 WRAP_BINARY(proxy_ior, PyNumber_InPlaceOr)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
310
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
311 static int
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
312 proxy_nonzero(PyWeakReference *proxy)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
313 {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
314 PyObject *o = proxy->wr_object;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
315 if (!proxy_checkref(proxy))
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
316 return 1;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
317 if (o->ob_type->tp_as_number &&
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
318 o->ob_type->tp_as_number->nb_nonzero)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
319 return (*o->ob_type->tp_as_number->nb_nonzero)(o);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
320 else
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
321 return 1;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
322 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
323
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
324 /* sequence slots */
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
325
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
326 static PyObject *
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
327 proxy_slice(PyWeakReference *proxy, int i, int j)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
328 {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
329 if (!proxy_checkref(proxy))
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
330 return NULL;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
331 return PySequence_GetSlice(proxy->wr_object, i, j);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
332 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
333
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
334 static int
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
335 proxy_ass_slice(PyWeakReference *proxy, int i, int j, PyObject *value)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
336 {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
337 if (!proxy_checkref(proxy))
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
338 return -1;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
339 return PySequence_SetSlice(proxy->wr_object, i, j, value);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
340 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
341
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
342 static int
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
343 proxy_contains(PyWeakReference *proxy, PyObject *value)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
344 {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
345 if (!proxy_checkref(proxy))
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
346 return -1;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
347 return PySequence_Contains(proxy->wr_object, value);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
348 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
349
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
350
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
351 /* mapping slots */
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
352
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
353 static int
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
354 proxy_length(PyWeakReference *proxy)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
355 {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
356 if (!proxy_checkref(proxy))
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
357 return -1;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
358 return PyObject_Length(proxy->wr_object);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
359 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
360
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
361 WRAP_BINARY(proxy_getitem, PyObject_GetItem)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
362
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
363 static int
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
364 proxy_setitem(PyWeakReference *proxy, PyObject *key, PyObject *value)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
365 {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
366 if (!proxy_checkref(proxy))
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
367 return -1;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
368 return PyObject_SetItem(proxy->wr_object, key, value);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
369 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
370
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
371
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
372 static PyNumberMethods proxy_as_number = {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
373 (binaryfunc)proxy_add, /*nb_add*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
374 (binaryfunc)proxy_sub, /*nb_subtract*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
375 (binaryfunc)proxy_mul, /*nb_multiply*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
376 (binaryfunc)proxy_div, /*nb_divide*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
377 (binaryfunc)proxy_mod, /*nb_remainder*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
378 (binaryfunc)proxy_divmod, /*nb_divmod*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
379 (ternaryfunc)proxy_pow, /*nb_power*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
380 (unaryfunc)proxy_neg, /*nb_negative*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
381 (unaryfunc)proxy_pos, /*nb_positive*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
382 (unaryfunc)proxy_abs, /*nb_absolute*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
383 (inquiry)proxy_nonzero, /*nb_nonzero*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
384 (unaryfunc)proxy_invert, /*nb_invert*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
385 (binaryfunc)proxy_lshift, /*nb_lshift*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
386 (binaryfunc)proxy_rshift, /*nb_rshift*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
387 (binaryfunc)proxy_and, /*nb_and*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
388 (binaryfunc)proxy_xor, /*nb_xor*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
389 (binaryfunc)proxy_or, /*nb_or*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
390 (coercion)0, /*nb_coerce*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
391 (unaryfunc)proxy_int, /*nb_int*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
392 (unaryfunc)proxy_long, /*nb_long*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
393 (unaryfunc)proxy_float, /*nb_float*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
394 (unaryfunc)0, /*nb_oct*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
395 (unaryfunc)0, /*nb_hex*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
396 (binaryfunc)proxy_iadd, /*nb_inplace_add*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
397 (binaryfunc)proxy_isub, /*nb_inplace_subtract*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
398 (binaryfunc)proxy_imul, /*nb_inplace_multiply*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
399 (binaryfunc)proxy_idiv, /*nb_inplace_divide*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
400 (binaryfunc)proxy_imod, /*nb_inplace_remainder*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
401 (ternaryfunc)proxy_ipow, /*nb_inplace_power*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
402 (binaryfunc)proxy_ilshift, /*nb_inplace_lshift*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
403 (binaryfunc)proxy_irshift, /*nb_inplace_rshift*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
404 (binaryfunc)proxy_iand, /*nb_inplace_and*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
405 (binaryfunc)proxy_ixor, /*nb_inplace_xor*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
406 (binaryfunc)proxy_ior, /*nb_inplace_or*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
407 };
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
408
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
409 static PySequenceMethods proxy_as_sequence = {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
410 (inquiry)proxy_length, /*sq_length*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
411 0, /*sq_concat*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
412 0, /*sq_repeat*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
413 0, /*sq_item*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
414 (intintargfunc)proxy_slice, /*sq_slice*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
415 0, /*sq_ass_item*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
416 (intintobjargproc)proxy_ass_slice, /*sq_ass_slice*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
417 (objobjproc)proxy_contains, /* sq_contains */
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
418 };
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
419
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
420 static PyMappingMethods proxy_as_mapping = {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
421 (inquiry)proxy_length, /*mp_length*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
422 (binaryfunc)proxy_getitem, /*mp_subscript*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
423 (objobjargproc)proxy_setitem, /*mp_ass_subscript*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
424 };
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
425
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
426
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
427 static PyTypeObject
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
428 PyWeakProxy_Type = {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
429 PyObject_HEAD_INIT(NULL)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
430 0,
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
431 "weakproxy",
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
432 sizeof(PyWeakReference) + PyGC_HEAD_SIZE,
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
433 0,
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
434 /* methods */
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
435 (destructor)weakref_dealloc,/*tp_dealloc*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
436 (printfunc)proxy_print, /*tp_print*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
437 0, /*tp_getattr*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
438 0, /*tp_setattr*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
439 (cmpfunc)proxy_compare, /*tp_compare*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
440 (unaryfunc)proxy_repr, /*tp_repr*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
441 &proxy_as_number, /*tp_as_number*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
442 &proxy_as_sequence, /*tp_as_sequence*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
443 &proxy_as_mapping, /*tp_as_mapping*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
444 0, /*tp_hash*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
445 (ternaryfunc)0, /*tp_call*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
446 (unaryfunc)proxy_str, /*tp_str*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
447 (getattrofunc)proxy_getattr,/*tp_getattro*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
448 (setattrofunc)proxy_setattr,/*tp_setattro*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
449 0, /*tp_as_buffer*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
450 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_GC
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
451 |Py_TPFLAGS_CHECKTYPES, /*tp_flags*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
452 0, /*tp_doc*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
453 (traverseproc)gc_traverse, /*tp_traverse*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
454 (inquiry)gc_clear, /*tp_clear*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
455 };
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
456
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
457
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
458 static PyTypeObject
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
459 PyWeakCallableProxy_Type = {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
460 PyObject_HEAD_INIT(NULL)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
461 0,
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
462 "weakcallableproxy",
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
463 sizeof(PyWeakReference) + PyGC_HEAD_SIZE,
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
464 0,
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
465 /* methods */
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
466 (destructor)weakref_dealloc,/*tp_dealloc*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
467 (printfunc)proxy_print, /*tp_print*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
468 0, /*tp_getattr*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
469 0, /*tp_setattr*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
470 (cmpfunc)proxy_compare, /*tp_compare*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
471 (unaryfunc)proxy_repr, /*tp_repr*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
472 &proxy_as_number, /*tp_as_number*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
473 &proxy_as_sequence, /*tp_as_sequence*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
474 &proxy_as_mapping, /*tp_as_mapping*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
475 0, /*tp_hash*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
476 (ternaryfunc)proxy_call, /*tp_call*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
477 (unaryfunc)proxy_str, /*tp_str*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
478 (getattrofunc)proxy_getattr,/*tp_getattro*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
479 (setattrofunc)proxy_setattr,/*tp_setattro*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
480 0, /*tp_as_buffer*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
481 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_GC
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
482 |Py_TPFLAGS_CHECKTYPES, /*tp_flags*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
483 0, /*tp_doc*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
484 (traverseproc)gc_traverse, /*tp_traverse*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
485 (inquiry)gc_clear, /*tp_clear*/
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
486 };
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
487
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
488
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
489 static long
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
490 getweakrefcount(PyWeakReference *head)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
491 {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
492 long count = 0;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
493
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
494 while (head != NULL) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
495 ++count;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
496 head = head->wr_next;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
497 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
498 return count;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
499 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
500
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
501
16659
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
502 static char weakref_getweakrefcount__doc__[] =
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
503 "getweakrefcount(object) -- return the number of weak references\n"
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
504 "to 'object'.";
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
505
16385
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
506 static PyObject *
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
507 weakref_getweakrefcount(PyObject *self, PyObject *args)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
508 {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
509 PyObject *result = NULL;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
510 PyObject *object;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
511
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
512 if (PyArg_ParseTuple(args, "O:getweakrefcount", &object)) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
513 if (PyType_SUPPORTS_WEAKREFS(object->ob_type)) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
514 PyWeakReference **list = GET_WEAKREFS_LISTPTR(object);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
515
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
516 result = PyInt_FromLong(getweakrefcount(*list));
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
517 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
518 else
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
519 result = PyInt_FromLong(0);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
520 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
521 return result;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
522 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
523
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
524
16659
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
525 static char weakref_getweakrefs__doc__[] =
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
526 "getweakrefs(object) -- return a list of all weak reference objects\n"
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
527 "that point to 'object'.";
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
528
16385
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
529 static PyObject *
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
530 weakref_getweakrefs(PyObject *self, PyObject *args)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
531 {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
532 PyObject *result = NULL;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
533 PyObject *object;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
534
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
535 if (PyArg_ParseTuple(args, "O:getweakrefs", &object)) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
536 if (PyType_SUPPORTS_WEAKREFS(object->ob_type)) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
537 PyWeakReference **list = GET_WEAKREFS_LISTPTR(object);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
538 long count = getweakrefcount(*list);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
539
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
540 result = PyList_New(count);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
541 if (result != NULL) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
542 PyWeakReference *current = *list;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
543 long i;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
544 for (i = 0; i < count; ++i) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
545 PyList_SET_ITEM(result, i, (PyObject *) current);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
546 Py_INCREF(current);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
547 current = current->wr_next;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
548 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
549 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
550 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
551 else {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
552 result = PyList_New(0);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
553 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
554 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
555 return result;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
556 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
557
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
558
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
559 /* Given the head of an object's list of weak references, extract the
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
560 * two callback-less refs (ref and proxy). Used to determine if the
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
561 * shared references exist and to determine the back link for newly
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
562 * inserted references.
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
563 */
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
564 static void
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
565 get_basic_refs(PyWeakReference *head,
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
566 PyWeakReference **refp, PyWeakReference **proxyp)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
567 {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
568 *refp = NULL;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
569 *proxyp = NULL;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
570
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
571 if (head != NULL && head->wr_callback == NULL) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
572 if (head->ob_type == &PyWeakReference_Type) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
573 *refp = head;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
574 head = head->wr_next;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
575 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
576 if (head != NULL && head->wr_callback == NULL) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
577 *proxyp = head;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
578 head = head->wr_next;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
579 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
580 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
581 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
582
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
583 /* Insert 'newref' in the list after 'prev'. Both must be non-NULL. */
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
584 static void
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
585 insert_after(PyWeakReference *newref, PyWeakReference *prev)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
586 {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
587 newref->wr_prev = prev;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
588 newref->wr_next = prev->wr_next;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
589 if (prev->wr_next != NULL)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
590 prev->wr_next->wr_prev = newref;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
591 prev->wr_next = newref;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
592 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
593
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
594 /* Insert 'newref' at the head of the list; 'list' points to the variable
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
595 * that stores the head.
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
596 */
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
597 static void
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
598 insert_head(PyWeakReference *newref, PyWeakReference **list)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
599 {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
600 PyWeakReference *next = *list;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
601
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
602 newref->wr_prev = NULL;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
603 newref->wr_next = next;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
604 if (next != NULL)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
605 next->wr_prev = newref;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
606 *list = newref;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
607 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
608
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
609
16659
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
610 static char weakref_ref__doc__[] =
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
611 "new(object[, callback]) -- create a weak reference to 'object';\n"
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
612 "when 'object' is finalized, 'callback' will be called and passed\n"
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
613 "a reference to 'object'.";
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
614
16385
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
615 static PyObject *
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
616 weakref_ref(PyObject *self, PyObject *args)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
617 {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
618 PyObject *object;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
619 PyObject *callback = NULL;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
620 PyWeakReference *result = NULL;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
621
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
622 if (PyArg_ParseTuple(args, "O|O:new", &object, &callback)) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
623 PyWeakReference **list;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
624 PyWeakReference *ref, *proxy;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
625
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
626 if (!PyType_SUPPORTS_WEAKREFS(object->ob_type)) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
627 PyErr_Format(PyExc_TypeError,
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
628 "'%s' objects are not weakly referencable",
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
629 object->ob_type->tp_name);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
630 return NULL;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
631 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
632 list = GET_WEAKREFS_LISTPTR(object);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
633 get_basic_refs(*list, &ref, &proxy);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
634 if (callback == NULL) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
635 /* return existing weak reference if it exists */
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
636 result = ref;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
637 Py_XINCREF(result);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
638 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
639 if (result == NULL) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
640 result = new_weakref();
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
641 if (result != NULL) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
642 Py_XINCREF(callback);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
643 result->wr_callback = callback;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
644 result->wr_object = object;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
645 if (callback == NULL) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
646 insert_head(result, list);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
647 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
648 else {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
649 PyWeakReference *prev = (proxy == NULL) ? ref : proxy;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
650
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
651 if (prev == NULL)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
652 insert_head(result, list);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
653 else
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
654 insert_after(result, prev);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
655 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
656 PyObject_GC_Init((PyObject *) result);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
657 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
658 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
659 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
660 return (PyObject *) result;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
661 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
662
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
663
16659
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
664 static char weakref_proxy__doc__[] =
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
665 "proxy(object[, callback]) -- create a proxy object that weakly\n"
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
666 "references 'object'. 'callback', if given, is called with a\n"
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
667 "reference to the proxy when it is about to be finalized.";
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
668
16385
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
669 static PyObject *
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
670 weakref_proxy(PyObject *self, PyObject *args)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
671 {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
672 PyObject *object;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
673 PyObject *callback = NULL;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
674 PyWeakReference *result = NULL;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
675
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
676 if (PyArg_ParseTuple(args, "O|O:new", &object, &callback)) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
677 PyWeakReference **list;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
678 PyWeakReference *ref, *proxy;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
679
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
680 if (!PyType_SUPPORTS_WEAKREFS(object->ob_type)) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
681 PyErr_Format(PyExc_TypeError,
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
682 "'%s' objects are not weakly referencable",
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
683 object->ob_type->tp_name);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
684 return NULL;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
685 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
686 list = GET_WEAKREFS_LISTPTR(object);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
687 get_basic_refs(*list, &ref, &proxy);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
688 if (callback == NULL) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
689 /* attempt to return an existing weak reference if it exists */
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
690 result = proxy;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
691 Py_XINCREF(result);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
692 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
693 if (result == NULL) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
694 result = new_weakref();
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
695 if (result != NULL) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
696 PyWeakReference *prev;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
697
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
698 if (PyCallable_Check(object))
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
699 result->ob_type = &PyWeakCallableProxy_Type;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
700 else
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
701 result->ob_type = &PyWeakProxy_Type;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
702 result->wr_object = object;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
703 Py_XINCREF(callback);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
704 result->wr_callback = callback;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
705 if (callback == NULL)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
706 prev = ref;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
707 else
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
708 prev = (proxy == NULL) ? ref : proxy;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
709
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
710 if (prev == NULL)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
711 insert_head(result, list);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
712 else
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
713 insert_after(result, prev);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
714 PyObject_GC_Init((PyObject *) result);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
715 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
716 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
717 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
718 return (PyObject *) result;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
719 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
720
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
721
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
722 /* This is the implementation of the PyObject_ClearWeakRefs() function; it
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
723 * is installed in the init_weakref() function. It is called by the
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
724 * tp_dealloc handler to clear weak references.
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
725 *
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
726 * This iterates through the weak references for 'object' and calls callbacks
16769
905011e8740c cleanup_helper(): Added missing "void" type for the function, updated
Fred Drake <fdrake@acm.org>
parents: 16768
diff changeset
727 * for those references which have one. It returns when all callbacks have
905011e8740c cleanup_helper(): Added missing "void" type for the function, updated
Fred Drake <fdrake@acm.org>
parents: 16768
diff changeset
728 * been attempted.
16385
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
729 */
16769
905011e8740c cleanup_helper(): Added missing "void" type for the function, updated
Fred Drake <fdrake@acm.org>
parents: 16768
diff changeset
730 static void
16385
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
731 cleanup_helper(PyObject *object)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
732 {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
733 PyWeakReference **list;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
734
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
735 if (object == NULL
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
736 || !PyType_SUPPORTS_WEAKREFS(object->ob_type)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
737 || object->ob_refcnt != 0) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
738 PyErr_BadInternalCall();
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
739 /* not sure what we should return here */
16768
d446e4ec9b7b The return value from PyObject_ClearWeakRefs() is no longer meaningful,
Fred Drake <fdrake@acm.org>
parents: 16659
diff changeset
740 return;
16385
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
741 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
742 list = GET_WEAKREFS_LISTPTR(object);
17497
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
743 /* Remove the callback-less basic and proxy references */
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
744 if (*list != NULL && (*list)->wr_callback == NULL) {
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
745 clear_weakref(*list);
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
746 if (*list != NULL && (*list)->wr_callback == NULL)
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
747 clear_weakref(*list);
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
748 }
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
749 if (*list != NULL) {
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
750 int count = getweakrefcount(*list);
16385
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
751
17497
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
752 if (count == 1) {
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
753 PyWeakReference *current = *list;
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
754 PyObject *callback = current->wr_callback;
16385
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
755 PyObject *cbresult;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
756
17497
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
757 Py_INCREF(callback);
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
758 clear_weakref(current);
16385
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
759 cbresult = PyObject_CallFunction(callback, "O", current);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
760 if (cbresult == NULL)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
761 PyErr_WriteUnraisable(callback);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
762 else
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
763 Py_DECREF(cbresult);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
764 Py_DECREF(callback);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
765 }
17497
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
766 else {
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
767 PyObject *tuple = PyTuple_New(count * 2);
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
768 PyWeakReference *current = *list;
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
769 int i = 0;
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
770
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
771 for (i = 0; i < count; ++i) {
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
772 PyWeakReference *next = current->wr_next;
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
773
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
774 Py_INCREF(current);
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
775 PyTuple_SET_ITEM(tuple, i * 2, (PyObject *) current);
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
776 PyTuple_SET_ITEM(tuple, i * 2 + 1, current->wr_callback);
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
777 current->wr_callback = NULL;
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
778 next = current->wr_next;
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
779 clear_weakref(current);
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
780 current = next;
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
781 }
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
782 for (i = 0; i < count; ++i) {
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
783 PyObject *current = PyTuple_GET_ITEM(tuple, i * 2);
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
784 PyObject *callback = PyTuple_GET_ITEM(tuple, i * 2 + 1);
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
785 PyObject *cbresult = PyObject_CallFunction(callback, "O",
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
786 current);
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
787 if (cbresult == NULL)
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
788 PyErr_WriteUnraisable(callback);
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
789 else
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
790 Py_DECREF(cbresult);
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
791 }
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
792 Py_DECREF(tuple);
6a3776201750 cleanup_helper(): Make sure we invalidate all reference objects
Fred Drake <fdrake@acm.org>
parents: 17179
diff changeset
793 }
16385
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
794 }
16768
d446e4ec9b7b The return value from PyObject_ClearWeakRefs() is no longer meaningful,
Fred Drake <fdrake@acm.org>
parents: 16659
diff changeset
795 return;
16385
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
796 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
797
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
798
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
799 static PyMethodDef
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
800 weakref_functions[] = {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
801 {"getweakrefcount", weakref_getweakrefcount, METH_VARARGS,
16659
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
802 weakref_getweakrefcount__doc__},
16385
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
803 {"getweakrefs", weakref_getweakrefs, METH_VARARGS,
16659
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
804 weakref_getweakrefs__doc__},
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
805 {"proxy", weakref_proxy, METH_VARARGS,
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
806 weakref_proxy__doc__},
16385
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
807 {"ref", weakref_ref, METH_VARARGS,
16659
deec6fa80471 Move docstrings out of function table to constants defined near the
Fred Drake <fdrake@acm.org>
parents: 16434
diff changeset
808 weakref_ref__doc__},
16385
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
809 {NULL, NULL, 0, NULL}
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
810 };
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
811
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
812
16402
08ac556f2d12 Teach Windows build about the _weakref module.
Tim Peters <tim.peters@gmail.com>
parents: 16385
diff changeset
813 DL_EXPORT(void)
16385
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
814 init_weakref(void)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
815 {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
816 PyObject *m;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
817
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
818 PyWeakReference_Type.ob_type = &PyType_Type;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
819 PyWeakProxy_Type.ob_type = &PyType_Type;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
820 PyWeakCallableProxy_Type.ob_type = &PyType_Type;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
821 m = Py_InitModule3("_weakref", weakref_functions,
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
822 "Weak-reference support module.");
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
823 if (m != NULL) {
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
824 PyObject_ClearWeakRefs = cleanup_helper;
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
825 Py_INCREF(&PyWeakReference_Type);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
826 PyModule_AddObject(m, "ReferenceType",
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
827 (PyObject *) &PyWeakReference_Type);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
828 Py_INCREF(&PyWeakProxy_Type);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
829 PyModule_AddObject(m, "ProxyType",
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
830 (PyObject *) &PyWeakProxy_Type);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
831 Py_INCREF(&PyWeakCallableProxy_Type);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
832 PyModule_AddObject(m, "CallableProxyType",
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
833 (PyObject *) &PyWeakCallableProxy_Type);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
834 ReferenceError = PyErr_NewException("weakref.ReferenceError",
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
835 PyExc_RuntimeError, NULL);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
836 if (ReferenceError != NULL)
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
837 PyModule_AddObject(m, "ReferenceError", ReferenceError);
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
838 }
1fb6672b20ef PEP 205, Weak References -- initial checkin.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
839 }