cpython-lru_cache-weakref: Objects/weakrefobject.c annotate

annotate Objects/weakrefobject.c @ 32931:ec71ae3bc2dd 2.3

Be more careful about maintaining the invariants; it was actually possible that the callback-less flavors of the ref or proxy could have been added during GC, so we don't want to replace them.

author	Fred Drake <fdrake@acm.org>
date	Tue, 03 Aug 2004 14:46:57 +0000
parents	3cc3cb79043f
children	b585bccfb250

rev	line source
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	1 #include "Python.h"
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	2 #include "structmember.h"
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	3
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	4
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	5 #define GET_WEAKREFS_LISTPTR(o) \
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	6 ((PyWeakReference **) PyObject_GET_WEAKREFS_LISTPTR(o))
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	7
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	8
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	9 long
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	10 _PyWeakref_GetWeakrefCount(PyWeakReference *head)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	11 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	12 long count = 0;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	13
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	14 while (head != NULL) {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	15 ++count;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	16 head = head->wr_next;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	17 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	18 return count;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	19 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	20
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	21
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	22 static PyWeakReference *
22607 ac24c2c9bcaf Remove weakref free list. This has the side effect of fixing a memory Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 21483 diff changeset	23 new_weakref(PyObject ob, PyObject callback)
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	24 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	25 PyWeakReference *result;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	26
22607 ac24c2c9bcaf Remove weakref free list. This has the side effect of fixing a memory Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 21483 diff changeset	27 result = PyObject_GC_New(PyWeakReference, &_PyWeakref_RefType);
ac24c2c9bcaf Remove weakref free list. This has the side effect of fixing a memory Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 21483 diff changeset	28 if (result) {
ac24c2c9bcaf Remove weakref free list. This has the side effect of fixing a memory Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 21483 diff changeset	29 result->hash = -1;
ac24c2c9bcaf Remove weakref free list. This has the side effect of fixing a memory Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 21483 diff changeset	30 result->wr_object = ob;
ac24c2c9bcaf Remove weakref free list. This has the side effect of fixing a memory Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 21483 diff changeset	31 Py_XINCREF(callback);
ac24c2c9bcaf Remove weakref free list. This has the side effect of fixing a memory Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 21483 diff changeset	32 result->wr_callback = callback;
ac24c2c9bcaf Remove weakref free list. This has the side effect of fixing a memory Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 21483 diff changeset	33 PyObject_GC_Track(result);
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	34 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	35 return result;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	36 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	37
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	38
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	39 /* This function clears the passed-in reference and removes it from the
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	40 * list of weak references for the referent. This is the only code that
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	41 * removes an item from the doubly-linked list of weak references for an
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	42 * object; it is also responsible for clearing the callback slot.
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	43 */
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	44 static void
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	45 clear_weakref(PyWeakReference *self)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	46 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	47 PyObject *callback = self->wr_callback;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	48
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	49 if (PyWeakref_GET_OBJECT(self) != Py_None) {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	50 PyWeakReference **list = GET_WEAKREFS_LISTPTR(
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	51 PyWeakref_GET_OBJECT(self));
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	52
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	53 if (*list == self)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	54 *list = self->wr_next;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	55 self->wr_object = Py_None;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	56 if (self->wr_prev != NULL)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	57 self->wr_prev->wr_next = self->wr_next;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	58 if (self->wr_next != NULL)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	59 self->wr_next->wr_prev = self->wr_prev;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	60 self->wr_prev = NULL;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	61 self->wr_next = NULL;
30991 14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	62 }
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	63 if (callback != NULL) {
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	64 Py_DECREF(callback);
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	65 self->wr_callback = NULL;
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	66 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	67 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	68
30991 14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	69 /* Cyclic gc uses this to just clear the passed-in reference, leaving
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	70 * the callback intact and uncalled. It must be possible to call self's
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	71 * tp_dealloc() after calling this, so self has to be left in a sane enough
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	72 * state for that to work. We expect tp_dealloc to decref the callback
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	73 * then. The reason for not letting clear_weakref() decref the callback
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	74 * right now is that if the callback goes away, that may in turn trigger
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	75 * another callback (if a weak reference to the callback exists) -- running
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	76 * arbitrary Python code in the middle of gc is a disaster. The convolution
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	77 * here allows gc to delay triggering such callbacks until the world is in
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	78 * a sane state again.
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	79 */
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	80 void
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	81 _PyWeakref_ClearRef(PyWeakReference *self)
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	82 {
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	83 PyObject *callback;
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	84
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	85 assert(self != NULL);
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	86 assert(PyWeakref_Check(self));
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	87 /* Preserve and restore the callback around clear_weakref. */
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	88 callback = self->wr_callback;
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	89 self->wr_callback = NULL;
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	90 clear_weakref(self);
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	91 self->wr_callback = callback;
14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	92 }
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	93
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	94 static void
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	95 weakref_dealloc(PyWeakReference *self)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	96 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	97 PyObject_GC_UnTrack((PyObject *)self);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	98 clear_weakref(self);
22607 ac24c2c9bcaf Remove weakref free list. This has the side effect of fixing a memory Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 21483 diff changeset	99 PyObject_GC_Del(self);
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	100 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	101
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	102
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	103 static int
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	104 gc_traverse(PyWeakReference self, visitproc visit, void arg)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	105 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	106 if (self->wr_callback != NULL)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	107 return visit(self->wr_callback, arg);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	108 return 0;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	109 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	110
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	111
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	112 static int
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	113 gc_clear(PyWeakReference *self)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	114 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	115 clear_weakref(self);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	116 return 0;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	117 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	118
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	119
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	120 static PyObject *
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	121 weakref_call(PyWeakReference self, PyObject args, PyObject *kw)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	122 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	123 static char *argnames[] = {NULL};
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	124
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	125 if (PyArg_ParseTupleAndKeywords(args, kw, ":__call__", argnames)) {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	126 PyObject *object = PyWeakref_GET_OBJECT(self);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	127 Py_INCREF(object);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	128 return (object);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	129 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	130 return NULL;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	131 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	132
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	133
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	134 static long
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	135 weakref_hash(PyWeakReference *self)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	136 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	137 if (self->hash != -1)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	138 return self->hash;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	139 if (PyWeakref_GET_OBJECT(self) == Py_None) {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	140 PyErr_SetString(PyExc_TypeError, "weak object has gone away");
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	141 return -1;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	142 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	143 self->hash = PyObject_Hash(PyWeakref_GET_OBJECT(self));
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	144 return self->hash;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	145 }
30991 14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	146
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	147
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	148 static PyObject *
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	149 weakref_repr(PyWeakReference *self)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	150 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	151 char buffer[256];
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	152 if (PyWeakref_GET_OBJECT(self) == Py_None) {
28644 8e541b078edb - The repr() of a weakref object now shows the __name__ attribute of Guido van Rossum <guido@python.org> parents: 24717 diff changeset	153 PyOS_snprintf(buffer, sizeof(buffer), "<weakref at %p; dead>", self);
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	154 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	155 else {
28644 8e541b078edb - The repr() of a weakref object now shows the __name__ attribute of Guido van Rossum <guido@python.org> parents: 24717 diff changeset	156 char *name = NULL;
8e541b078edb - The repr() of a weakref object now shows the __name__ attribute of Guido van Rossum <guido@python.org> parents: 24717 diff changeset	157 PyObject *nameobj = PyObject_GetAttrString(PyWeakref_GET_OBJECT(self),
8e541b078edb - The repr() of a weakref object now shows the __name__ attribute of Guido van Rossum <guido@python.org> parents: 24717 diff changeset	158 "__name__");
8e541b078edb - The repr() of a weakref object now shows the __name__ attribute of Guido van Rossum <guido@python.org> parents: 24717 diff changeset	159 if (nameobj == NULL)
8e541b078edb - The repr() of a weakref object now shows the __name__ attribute of Guido van Rossum <guido@python.org> parents: 24717 diff changeset	160 PyErr_Clear();
8e541b078edb - The repr() of a weakref object now shows the __name__ attribute of Guido van Rossum <guido@python.org> parents: 24717 diff changeset	161 else if (PyString_Check(nameobj))
8e541b078edb - The repr() of a weakref object now shows the __name__ attribute of Guido van Rossum <guido@python.org> parents: 24717 diff changeset	162 name = PyString_AS_STRING(nameobj);
21083 d3b6401ca273 weakref_repr(), proxy_repr(): Conversion of sprintf() to Barry Warsaw <barry@python.org> parents: 21066 diff changeset	163 PyOS_snprintf(buffer, sizeof(buffer),
28644 8e541b078edb - The repr() of a weakref object now shows the __name__ attribute of Guido van Rossum <guido@python.org> parents: 24717 diff changeset	164 name ? "<weakref at %p; to '%.50s' at %p (%s)>"
8e541b078edb - The repr() of a weakref object now shows the __name__ attribute of Guido van Rossum <guido@python.org> parents: 24717 diff changeset	165 : "<weakref at %p; to '%.50s' at %p>",
8e541b078edb - The repr() of a weakref object now shows the __name__ attribute of Guido van Rossum <guido@python.org> parents: 24717 diff changeset	166 self,
21083 d3b6401ca273 weakref_repr(), proxy_repr(): Conversion of sprintf() to Barry Warsaw <barry@python.org> parents: 21066 diff changeset	167 PyWeakref_GET_OBJECT(self)->ob_type->tp_name,
28644 8e541b078edb - The repr() of a weakref object now shows the __name__ attribute of Guido van Rossum <guido@python.org> parents: 24717 diff changeset	168 PyWeakref_GET_OBJECT(self),
8e541b078edb - The repr() of a weakref object now shows the __name__ attribute of Guido van Rossum <guido@python.org> parents: 24717 diff changeset	169 name);
8e541b078edb - The repr() of a weakref object now shows the __name__ attribute of Guido van Rossum <guido@python.org> parents: 24717 diff changeset	170 Py_XDECREF(nameobj);
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	171 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	172 return PyString_FromString(buffer);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	173 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	174
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	175 /* Weak references only support equality, not ordering. Two weak references
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	176 are equal if the underlying objects are equal. If the underlying object has
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	177 gone away, they are equal if they are identical. */
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	178
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	179 static PyObject *
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	180 weakref_richcompare(PyWeakReference* self, PyWeakReference* other, int op)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	181 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	182 if (op != Py_EQ \|\| self->ob_type != other->ob_type) {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	183 Py_INCREF(Py_NotImplemented);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	184 return Py_NotImplemented;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	185 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	186 if (PyWeakref_GET_OBJECT(self) == Py_None
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	187 \|\| PyWeakref_GET_OBJECT(other) == Py_None) {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	188 PyObject *res = self==other ? Py_True : Py_False;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	189 Py_INCREF(res);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	190 return res;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	191 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	192 return PyObject_RichCompare(PyWeakref_GET_OBJECT(self),
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	193 PyWeakref_GET_OBJECT(other), op);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	194 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	195
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	196
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	197 PyTypeObject
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	198 _PyWeakref_RefType = {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	199 PyObject_HEAD_INIT(&PyType_Type)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	200 0,
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	201 "weakref",
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	202 sizeof(PyWeakReference),
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	203 0,
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	204 (destructor)weakref_dealloc,/tp_dealloc/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	205 0, /tp_print/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	206 0, /tp_getattr/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	207 0, /tp_setattr/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	208 0, /tp_compare/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	209 (reprfunc)weakref_repr, /tp_repr/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	210 0, /tp_as_number/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	211 0, /tp_as_sequence/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	212 0, /tp_as_mapping/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	213 (hashfunc)weakref_hash, /tp_hash/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	214 (ternaryfunc)weakref_call, /tp_call/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	215 0, /tp_str/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	216 0, /tp_getattro/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	217 0, /tp_setattro/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	218 0, /tp_as_buffer/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	219 Py_TPFLAGS_DEFAULT \| Py_TPFLAGS_HAVE_GC \| Py_TPFLAGS_HAVE_RICHCOMPARE,
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	220 0, /tp_doc/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	221 (traverseproc)gc_traverse, /tp_traverse/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	222 (inquiry)gc_clear, /tp_clear/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	223 (richcmpfunc)weakref_richcompare, /tp_richcompare/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	224 0, /tp_weaklistoffset/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	225 };
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	226
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	227
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	228 static int
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	229 proxy_checkref(PyWeakReference *proxy)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	230 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	231 if (PyWeakref_GET_OBJECT(proxy) == Py_None) {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	232 PyErr_SetString(PyExc_ReferenceError,
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	233 "weakly-referenced object no longer exists");
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	234 return 0;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	235 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	236 return 1;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	237 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	238
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	239
20521 cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	240 /* If a parameter is a proxy, check that it is still "live" and wrap it,
cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	241 * replacing the original value with the raw object. Raises ReferenceError
cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	242 * if the param is a dead proxy.
cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	243 */
cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	244 #define UNWRAP(o) \
cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	245 if (PyWeakref_CheckProxy(o)) { \
cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	246 if (!proxy_checkref((PyWeakReference *)o)) \
cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	247 return NULL; \
cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	248 o = PyWeakref_GET_OBJECT(o); \
cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	249 }
cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	250
21483 873291a4889e proxy_compare(): Make sure that we unwrap both objects being compared if Fred Drake <fdrake@acm.org> parents: 21339 diff changeset	251 #define UNWRAP_I(o) \
873291a4889e proxy_compare(): Make sure that we unwrap both objects being compared if Fred Drake <fdrake@acm.org> parents: 21339 diff changeset	252 if (PyWeakref_CheckProxy(o)) { \
873291a4889e proxy_compare(): Make sure that we unwrap both objects being compared if Fred Drake <fdrake@acm.org> parents: 21339 diff changeset	253 if (!proxy_checkref((PyWeakReference *)o)) \
873291a4889e proxy_compare(): Make sure that we unwrap both objects being compared if Fred Drake <fdrake@acm.org> parents: 21339 diff changeset	254 return -1; \
873291a4889e proxy_compare(): Make sure that we unwrap both objects being compared if Fred Drake <fdrake@acm.org> parents: 21339 diff changeset	255 o = PyWeakref_GET_OBJECT(o); \
873291a4889e proxy_compare(): Make sure that we unwrap both objects being compared if Fred Drake <fdrake@acm.org> parents: 21339 diff changeset	256 }
873291a4889e proxy_compare(): Make sure that we unwrap both objects being compared if Fred Drake <fdrake@acm.org> parents: 21339 diff changeset	257
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	258 #define WRAP_UNARY(method, generic) \
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	259 static PyObject * \
20521 cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	260 method(PyObject *proxy) { \
cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	261 UNWRAP(proxy); \
cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	262 return generic(proxy); \
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	263 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	264
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	265 #define WRAP_BINARY(method, generic) \
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	266 static PyObject * \
20521 cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	267 method(PyObject x, PyObject y) { \
cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	268 UNWRAP(x); \
cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	269 UNWRAP(y); \
cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	270 return generic(x, y); \
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	271 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	272
20532 bc138bc73cdd Remove an unnecessary check for NULL. Fred Drake <fdrake@acm.org> parents: 20521 diff changeset	273 /* Note that the third arg needs to be checked for NULL since the tp_call
bc138bc73cdd Remove an unnecessary check for NULL. Fred Drake <fdrake@acm.org> parents: 20521 diff changeset	274 * slot can receive NULL for this arg.
20521 cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	275 */
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	276 #define WRAP_TERNARY(method, generic) \
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	277 static PyObject * \
20521 cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	278 method(PyObject proxy, PyObject v, PyObject *w) { \
cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	279 UNWRAP(proxy); \
20532 bc138bc73cdd Remove an unnecessary check for NULL. Fred Drake <fdrake@acm.org> parents: 20521 diff changeset	280 UNWRAP(v); \
20521 cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	281 if (w != NULL) \
cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	282 UNWRAP(w); \
cb87bd97f740 When weakref proxies are involved in binary & ternary slot operations, Fred Drake <fdrake@acm.org> parents: 20280 diff changeset	283 return generic(proxy, v, w); \
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	284 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	285
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	286
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	287 /* direct slots */
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	288
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	289 WRAP_BINARY(proxy_getattr, PyObject_GetAttr)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	290 WRAP_UNARY(proxy_str, PyObject_Str)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	291 WRAP_TERNARY(proxy_call, PyEval_CallObjectWithKeywords)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	292
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	293 static PyObject *
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	294 proxy_repr(PyWeakReference *proxy)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	295 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	296 char buf[160];
21083 d3b6401ca273 weakref_repr(), proxy_repr(): Conversion of sprintf() to Barry Warsaw <barry@python.org> parents: 21066 diff changeset	297 PyOS_snprintf(buf, sizeof(buf),
28644 8e541b078edb - The repr() of a weakref object now shows the __name__ attribute of Guido van Rossum <guido@python.org> parents: 24717 diff changeset	298 "<weakproxy at %p to %.100s at %p>", proxy,
21083 d3b6401ca273 weakref_repr(), proxy_repr(): Conversion of sprintf() to Barry Warsaw <barry@python.org> parents: 21066 diff changeset	299 PyWeakref_GET_OBJECT(proxy)->ob_type->tp_name,
d3b6401ca273 weakref_repr(), proxy_repr(): Conversion of sprintf() to Barry Warsaw <barry@python.org> parents: 21066 diff changeset	300 PyWeakref_GET_OBJECT(proxy));
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	301 return PyString_FromString(buf);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	302 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	303
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	304
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	305 static int
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	306 proxy_setattr(PyWeakReference proxy, PyObject name, PyObject *value)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	307 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	308 if (!proxy_checkref(proxy))
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	309 return -1;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	310 return PyObject_SetAttr(PyWeakref_GET_OBJECT(proxy), name, value);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	311 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	312
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	313 static int
21483 873291a4889e proxy_compare(): Make sure that we unwrap both objects being compared if Fred Drake <fdrake@acm.org> parents: 21339 diff changeset	314 proxy_compare(PyObject proxy, PyObject v)
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	315 {
21483 873291a4889e proxy_compare(): Make sure that we unwrap both objects being compared if Fred Drake <fdrake@acm.org> parents: 21339 diff changeset	316 UNWRAP_I(proxy);
873291a4889e proxy_compare(): Make sure that we unwrap both objects being compared if Fred Drake <fdrake@acm.org> parents: 21339 diff changeset	317 UNWRAP_I(v);
873291a4889e proxy_compare(): Make sure that we unwrap both objects being compared if Fred Drake <fdrake@acm.org> parents: 21339 diff changeset	318 return PyObject_Compare(proxy, v);
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	319 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	320
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	321 /* number slots */
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	322 WRAP_BINARY(proxy_add, PyNumber_Add)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	323 WRAP_BINARY(proxy_sub, PyNumber_Subtract)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	324 WRAP_BINARY(proxy_mul, PyNumber_Multiply)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	325 WRAP_BINARY(proxy_div, PyNumber_Divide)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	326 WRAP_BINARY(proxy_mod, PyNumber_Remainder)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	327 WRAP_BINARY(proxy_divmod, PyNumber_Divmod)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	328 WRAP_TERNARY(proxy_pow, PyNumber_Power)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	329 WRAP_UNARY(proxy_neg, PyNumber_Negative)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	330 WRAP_UNARY(proxy_pos, PyNumber_Positive)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	331 WRAP_UNARY(proxy_abs, PyNumber_Absolute)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	332 WRAP_UNARY(proxy_invert, PyNumber_Invert)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	333 WRAP_BINARY(proxy_lshift, PyNumber_Lshift)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	334 WRAP_BINARY(proxy_rshift, PyNumber_Rshift)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	335 WRAP_BINARY(proxy_and, PyNumber_And)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	336 WRAP_BINARY(proxy_xor, PyNumber_Xor)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	337 WRAP_BINARY(proxy_or, PyNumber_Or)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	338 WRAP_UNARY(proxy_int, PyNumber_Int)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	339 WRAP_UNARY(proxy_long, PyNumber_Long)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	340 WRAP_UNARY(proxy_float, PyNumber_Float)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	341 WRAP_BINARY(proxy_iadd, PyNumber_InPlaceAdd)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	342 WRAP_BINARY(proxy_isub, PyNumber_InPlaceSubtract)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	343 WRAP_BINARY(proxy_imul, PyNumber_InPlaceMultiply)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	344 WRAP_BINARY(proxy_idiv, PyNumber_InPlaceDivide)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	345 WRAP_BINARY(proxy_imod, PyNumber_InPlaceRemainder)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	346 WRAP_TERNARY(proxy_ipow, PyNumber_InPlacePower)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	347 WRAP_BINARY(proxy_ilshift, PyNumber_InPlaceLshift)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	348 WRAP_BINARY(proxy_irshift, PyNumber_InPlaceRshift)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	349 WRAP_BINARY(proxy_iand, PyNumber_InPlaceAnd)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	350 WRAP_BINARY(proxy_ixor, PyNumber_InPlaceXor)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	351 WRAP_BINARY(proxy_ior, PyNumber_InPlaceOr)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	352
30991 14d321466a06 SF bug 839548: Bug in type's GC handling causes segfaults. Tim Peters <tim.peters@gmail.com> parents: 29863 diff changeset	353 static int
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	354 proxy_nonzero(PyWeakReference *proxy)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	355 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	356 PyObject *o = PyWeakref_GET_OBJECT(proxy);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	357 if (!proxy_checkref(proxy))
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	358 return 1;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	359 if (o->ob_type->tp_as_number &&
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	360 o->ob_type->tp_as_number->nb_nonzero)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	361 return (*o->ob_type->tp_as_number->nb_nonzero)(o);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	362 else
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	363 return 1;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	364 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	365
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	366 /* sequence slots */
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	367
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	368 static PyObject *
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	369 proxy_slice(PyWeakReference *proxy, int i, int j)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	370 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	371 if (!proxy_checkref(proxy))
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	372 return NULL;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	373 return PySequence_GetSlice(PyWeakref_GET_OBJECT(proxy), i, j);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	374 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	375
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	376 static int
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	377 proxy_ass_slice(PyWeakReference proxy, int i, int j, PyObject value)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	378 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	379 if (!proxy_checkref(proxy))
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	380 return -1;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	381 return PySequence_SetSlice(PyWeakref_GET_OBJECT(proxy), i, j, value);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	382 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	383
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	384 static int
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	385 proxy_contains(PyWeakReference proxy, PyObject value)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	386 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	387 if (!proxy_checkref(proxy))
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	388 return -1;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	389 return PySequence_Contains(PyWeakref_GET_OBJECT(proxy), value);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	390 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	391
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	392
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	393 /* mapping slots */
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	394
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	395 static int
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	396 proxy_length(PyWeakReference *proxy)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	397 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	398 if (!proxy_checkref(proxy))
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	399 return -1;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	400 return PyObject_Length(PyWeakref_GET_OBJECT(proxy));
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	401 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	402
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	403 WRAP_BINARY(proxy_getitem, PyObject_GetItem)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	404
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	405 static int
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	406 proxy_setitem(PyWeakReference proxy, PyObject key, PyObject *value)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	407 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	408 if (!proxy_checkref(proxy))
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	409 return -1;
29697 1d763862d1a1 Fix SF 762891: "del p[key]" on proxy object raises SystemError() Raymond Hettinger <python@rcn.com> parents: 28644 diff changeset	410
1d763862d1a1 Fix SF 762891: "del p[key]" on proxy object raises SystemError() Raymond Hettinger <python@rcn.com> parents: 28644 diff changeset	411 if (value == NULL)
1d763862d1a1 Fix SF 762891: "del p[key]" on proxy object raises SystemError() Raymond Hettinger <python@rcn.com> parents: 28644 diff changeset	412 return PyObject_DelItem(PyWeakref_GET_OBJECT(proxy), key);
1d763862d1a1 Fix SF 762891: "del p[key]" on proxy object raises SystemError() Raymond Hettinger <python@rcn.com> parents: 28644 diff changeset	413 else
1d763862d1a1 Fix SF 762891: "del p[key]" on proxy object raises SystemError() Raymond Hettinger <python@rcn.com> parents: 28644 diff changeset	414 return PyObject_SetItem(PyWeakref_GET_OBJECT(proxy), key, value);
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	415 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	416
24717 1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	417 /* iterator slots */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	418
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	419 static PyObject *
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	420 proxy_iter(PyWeakReference *proxy)
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	421 {
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	422 if (!proxy_checkref(proxy))
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	423 return NULL;
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	424 return PyObject_GetIter(PyWeakref_GET_OBJECT(proxy));
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	425 }
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	426
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	427 static PyObject *
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	428 proxy_iternext(PyWeakReference *proxy)
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	429 {
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	430 if (!proxy_checkref(proxy))
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	431 return NULL;
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	432 return PyIter_Next(PyWeakref_GET_OBJECT(proxy));
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	433 }
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	434
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	435
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	436 static PyNumberMethods proxy_as_number = {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	437 (binaryfunc)proxy_add, /nb_add/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	438 (binaryfunc)proxy_sub, /nb_subtract/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	439 (binaryfunc)proxy_mul, /nb_multiply/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	440 (binaryfunc)proxy_div, /nb_divide/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	441 (binaryfunc)proxy_mod, /nb_remainder/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	442 (binaryfunc)proxy_divmod, /nb_divmod/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	443 (ternaryfunc)proxy_pow, /nb_power/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	444 (unaryfunc)proxy_neg, /nb_negative/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	445 (unaryfunc)proxy_pos, /nb_positive/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	446 (unaryfunc)proxy_abs, /nb_absolute/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	447 (inquiry)proxy_nonzero, /nb_nonzero/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	448 (unaryfunc)proxy_invert, /nb_invert/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	449 (binaryfunc)proxy_lshift, /nb_lshift/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	450 (binaryfunc)proxy_rshift, /nb_rshift/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	451 (binaryfunc)proxy_and, /nb_and/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	452 (binaryfunc)proxy_xor, /nb_xor/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	453 (binaryfunc)proxy_or, /nb_or/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	454 (coercion)0, /nb_coerce/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	455 (unaryfunc)proxy_int, /nb_int/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	456 (unaryfunc)proxy_long, /nb_long/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	457 (unaryfunc)proxy_float, /nb_float/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	458 (unaryfunc)0, /nb_oct/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	459 (unaryfunc)0, /nb_hex/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	460 (binaryfunc)proxy_iadd, /nb_inplace_add/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	461 (binaryfunc)proxy_isub, /nb_inplace_subtract/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	462 (binaryfunc)proxy_imul, /nb_inplace_multiply/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	463 (binaryfunc)proxy_idiv, /nb_inplace_divide/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	464 (binaryfunc)proxy_imod, /nb_inplace_remainder/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	465 (ternaryfunc)proxy_ipow, /nb_inplace_power/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	466 (binaryfunc)proxy_ilshift, /nb_inplace_lshift/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	467 (binaryfunc)proxy_irshift, /nb_inplace_rshift/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	468 (binaryfunc)proxy_iand, /nb_inplace_and/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	469 (binaryfunc)proxy_ixor, /nb_inplace_xor/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	470 (binaryfunc)proxy_ior, /nb_inplace_or/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	471 };
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	472
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	473 static PySequenceMethods proxy_as_sequence = {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	474 (inquiry)proxy_length, /sq_length/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	475 0, /sq_concat/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	476 0, /sq_repeat/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	477 0, /sq_item/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	478 (intintargfunc)proxy_slice, /sq_slice/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	479 0, /sq_ass_item/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	480 (intintobjargproc)proxy_ass_slice, /sq_ass_slice/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	481 (objobjproc)proxy_contains, /* sq_contains */
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	482 };
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	483
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	484 static PyMappingMethods proxy_as_mapping = {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	485 (inquiry)proxy_length, /mp_length/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	486 (binaryfunc)proxy_getitem, /mp_subscript/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	487 (objobjargproc)proxy_setitem, /mp_ass_subscript/
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	488 };
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	489
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	490
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	491 PyTypeObject
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	492 _PyWeakref_ProxyType = {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	493 PyObject_HEAD_INIT(&PyType_Type)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	494 0,
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	495 "weakproxy",
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	496 sizeof(PyWeakReference),
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	497 0,
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	498 /* methods */
24717 1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	499 (destructor)weakref_dealloc, /* tp_dealloc */
29863 98c59bbdd8ec Remove proxy_print(), since that caused an inconsistency between Fred Drake <fdrake@acm.org> parents: 29697 diff changeset	500 0, /* tp_print */
24717 1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	501 0, /* tp_getattr */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	502 0, /* tp_setattr */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	503 proxy_compare, /* tp_compare */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	504 (unaryfunc)proxy_repr, /* tp_repr */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	505 &proxy_as_number, /* tp_as_number */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	506 &proxy_as_sequence, /* tp_as_sequence */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	507 &proxy_as_mapping, /* tp_as_mapping */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	508 0, /* tp_hash */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	509 (ternaryfunc)0, /* tp_call */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	510 (unaryfunc)proxy_str, /* tp_str */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	511 (getattrofunc)proxy_getattr, /* tp_getattro */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	512 (setattrofunc)proxy_setattr, /* tp_setattro */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	513 0, /* tp_as_buffer */
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	514 Py_TPFLAGS_DEFAULT \| Py_TPFLAGS_HAVE_GC
24717 1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	515 \| Py_TPFLAGS_CHECKTYPES, /* tp_flags */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	516 0, /* tp_doc */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	517 (traverseproc)gc_traverse, /* tp_traverse */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	518 (inquiry)gc_clear, /* tp_clear */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	519 0, /* tp_richcompare */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	520 0, /* tp_weaklistoffset */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	521 (getiterfunc)proxy_iter, /* tp_iter */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	522 (iternextfunc)proxy_iternext, /* tp_iternext */
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	523 };
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	524
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	525
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	526 PyTypeObject
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	527 _PyWeakref_CallableProxyType = {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	528 PyObject_HEAD_INIT(&PyType_Type)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	529 0,
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	530 "weakcallableproxy",
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	531 sizeof(PyWeakReference),
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	532 0,
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	533 /* methods */
24717 1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	534 (destructor)weakref_dealloc, /* tp_dealloc */
29863 98c59bbdd8ec Remove proxy_print(), since that caused an inconsistency between Fred Drake <fdrake@acm.org> parents: 29697 diff changeset	535 0, /* tp_print */
24717 1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	536 0, /* tp_getattr */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	537 0, /* tp_setattr */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	538 proxy_compare, /* tp_compare */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	539 (unaryfunc)proxy_repr, /* tp_repr */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	540 &proxy_as_number, /* tp_as_number */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	541 &proxy_as_sequence, /* tp_as_sequence */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	542 &proxy_as_mapping, /* tp_as_mapping */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	543 0, /* tp_hash */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	544 (ternaryfunc)proxy_call, /* tp_call */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	545 (unaryfunc)proxy_str, /* tp_str */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	546 (getattrofunc)proxy_getattr, /* tp_getattro */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	547 (setattrofunc)proxy_setattr, /* tp_setattro */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	548 0, /* tp_as_buffer */
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	549 Py_TPFLAGS_DEFAULT \| Py_TPFLAGS_HAVE_GC
24717 1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	550 \| Py_TPFLAGS_CHECKTYPES, /* tp_flags */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	551 0, /* tp_doc */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	552 (traverseproc)gc_traverse, /* tp_traverse */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	553 (inquiry)gc_clear, /* tp_clear */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	554 0, /* tp_richcompare */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	555 0, /* tp_weaklistoffset */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	556 (getiterfunc)proxy_iter, /* tp_iter */
1d3d980a3186 Add support for the iterator protocol to weakref proxy objects. Fred Drake <fdrake@acm.org> parents: 22607 diff changeset	557 (iternextfunc)proxy_iternext, /* tp_iternext */
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	558 };
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	559
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	560
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	561 /* Given the head of an object's list of weak references, extract the
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	562 * two callback-less refs (ref and proxy). Used to determine if the
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	563 * shared references exist and to determine the back link for newly
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	564 * inserted references.
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	565 */
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	566 static void
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	567 get_basic_refs(PyWeakReference *head,
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	568 PyWeakReference refp, PyWeakReference proxyp)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	569 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	570 *refp = NULL;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	571 *proxyp = NULL;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	572
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	573 if (head != NULL && head->wr_callback == NULL) {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	574 if (head->ob_type == &_PyWeakref_RefType) {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	575 *refp = head;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	576 head = head->wr_next;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	577 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	578 if (head != NULL && head->wr_callback == NULL) {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	579 *proxyp = head;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	580 head = head->wr_next;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	581 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	582 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	583 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	584
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	585 /* Insert 'newref' in the list after 'prev'. Both must be non-NULL. */
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	586 static void
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	587 insert_after(PyWeakReference newref, PyWeakReference prev)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	588 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	589 newref->wr_prev = prev;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	590 newref->wr_next = prev->wr_next;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	591 if (prev->wr_next != NULL)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	592 prev->wr_next->wr_prev = newref;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	593 prev->wr_next = newref;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	594 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	595
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	596 /* Insert 'newref' at the head of the list; 'list' points to the variable
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	597 * that stores the head.
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	598 */
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	599 static void
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	600 insert_head(PyWeakReference newref, PyWeakReference *list)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	601 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	602 PyWeakReference next = list;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	603
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	604 newref->wr_prev = NULL;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	605 newref->wr_next = next;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	606 if (next != NULL)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	607 next->wr_prev = newref;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	608 *list = newref;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	609 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	610
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	611
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	612 PyObject *
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	613 PyWeakref_NewRef(PyObject ob, PyObject callback)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	614 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	615 PyWeakReference *result = NULL;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	616 PyWeakReference **list;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	617 PyWeakReference ref, proxy;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	618
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	619 if (!PyType_SUPPORTS_WEAKREFS(ob->ob_type)) {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	620 PyErr_Format(PyExc_TypeError,
20613 bf4b37518c14 Referencable is not a word, so don't use it in an error message <wink>. Jeremy Hylton <jeremy@alum.mit.edu> parents: 20532 diff changeset	621 "cannot create weak reference to '%s' object",
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	622 ob->ob_type->tp_name);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	623 return NULL;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	624 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	625 list = GET_WEAKREFS_LISTPTR(ob);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	626 get_basic_refs(*list, &ref, &proxy);
31449 b4bc83f2fd04 Fix bug in interpretation of the "callback" argument in the constructors for Fred Drake <fdrake@acm.org> parents: 30991 diff changeset	627 if (callback == Py_None)
b4bc83f2fd04 Fix bug in interpretation of the "callback" argument in the constructors for Fred Drake <fdrake@acm.org> parents: 30991 diff changeset	628 callback = NULL;
b4bc83f2fd04 Fix bug in interpretation of the "callback" argument in the constructors for Fred Drake <fdrake@acm.org> parents: 30991 diff changeset	629 if (callback == NULL)
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	630 /* return existing weak reference if it exists */
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	631 result = ref;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	632 if (result != NULL)
31453 3cc3cb79043f Allocating a new weakref object can cause existing weakref objects for Fred Drake <fdrake@acm.org> parents: 31449 diff changeset	633 Py_INCREF(result);
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	634 else {
31453 3cc3cb79043f Allocating a new weakref object can cause existing weakref objects for Fred Drake <fdrake@acm.org> parents: 31449 diff changeset	635 /* Note: new_weakref() can trigger cyclic GC, so the weakref
3cc3cb79043f Allocating a new weakref object can cause existing weakref objects for Fred Drake <fdrake@acm.org> parents: 31449 diff changeset	636 list on ob can be mutated. This means that the ref and
3cc3cb79043f Allocating a new weakref object can cause existing weakref objects for Fred Drake <fdrake@acm.org> parents: 31449 diff changeset	637 proxy pointers we got back earlier may have been collected,
3cc3cb79043f Allocating a new weakref object can cause existing weakref objects for Fred Drake <fdrake@acm.org> parents: 31449 diff changeset	638 so we need to compute these values again before we use
3cc3cb79043f Allocating a new weakref object can cause existing weakref objects for Fred Drake <fdrake@acm.org> parents: 31449 diff changeset	639 them. */
22607 ac24c2c9bcaf Remove weakref free list. This has the side effect of fixing a memory Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 21483 diff changeset	640 result = new_weakref(ob, callback);
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	641 if (result != NULL) {
32931 ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	642 get_basic_refs(*list, &ref, &proxy);
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	643 if (callback == NULL) {
32931 ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	644 if (ref == NULL)
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	645 insert_head(result, list);
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	646 else {
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	647 /* Someone else added a ref without a callback
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	648 during GC. Return that one instead of this one
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	649 to avoid violating the invariants of the list
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	650 of weakrefs for ob. */
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	651 Py_DECREF(result);
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	652 Py_INCREF(ref);
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	653 result = ref;
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	654 }
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	655 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	656 else {
31453 3cc3cb79043f Allocating a new weakref object can cause existing weakref objects for Fred Drake <fdrake@acm.org> parents: 31449 diff changeset	657 PyWeakReference *prev;
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	658
31453 3cc3cb79043f Allocating a new weakref object can cause existing weakref objects for Fred Drake <fdrake@acm.org> parents: 31449 diff changeset	659 prev = (proxy == NULL) ? ref : proxy;
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	660 if (prev == NULL)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	661 insert_head(result, list);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	662 else
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	663 insert_after(result, prev);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	664 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	665 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	666 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	667 return (PyObject *) result;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	668 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	669
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	670
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	671 PyObject *
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	672 PyWeakref_NewProxy(PyObject ob, PyObject callback)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	673 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	674 PyWeakReference *result = NULL;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	675 PyWeakReference **list;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	676 PyWeakReference ref, proxy;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	677
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	678 if (!PyType_SUPPORTS_WEAKREFS(ob->ob_type)) {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	679 PyErr_Format(PyExc_TypeError,
20613 bf4b37518c14 Referencable is not a word, so don't use it in an error message <wink>. Jeremy Hylton <jeremy@alum.mit.edu> parents: 20532 diff changeset	680 "cannot create weak reference to '%s' object",
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	681 ob->ob_type->tp_name);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	682 return NULL;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	683 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	684 list = GET_WEAKREFS_LISTPTR(ob);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	685 get_basic_refs(*list, &ref, &proxy);
31449 b4bc83f2fd04 Fix bug in interpretation of the "callback" argument in the constructors for Fred Drake <fdrake@acm.org> parents: 30991 diff changeset	686 if (callback == Py_None)
b4bc83f2fd04 Fix bug in interpretation of the "callback" argument in the constructors for Fred Drake <fdrake@acm.org> parents: 30991 diff changeset	687 callback = NULL;
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	688 if (callback == NULL)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	689 /* attempt to return an existing weak reference if it exists */
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	690 result = proxy;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	691 if (result != NULL)
31453 3cc3cb79043f Allocating a new weakref object can cause existing weakref objects for Fred Drake <fdrake@acm.org> parents: 31449 diff changeset	692 Py_INCREF(result);
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	693 else {
31453 3cc3cb79043f Allocating a new weakref object can cause existing weakref objects for Fred Drake <fdrake@acm.org> parents: 31449 diff changeset	694 /* Note: new_weakref() can trigger cyclic GC, so the weakref
3cc3cb79043f Allocating a new weakref object can cause existing weakref objects for Fred Drake <fdrake@acm.org> parents: 31449 diff changeset	695 list on ob can be mutated. This means that the ref and
3cc3cb79043f Allocating a new weakref object can cause existing weakref objects for Fred Drake <fdrake@acm.org> parents: 31449 diff changeset	696 proxy pointers we got back earlier may have been collected,
3cc3cb79043f Allocating a new weakref object can cause existing weakref objects for Fred Drake <fdrake@acm.org> parents: 31449 diff changeset	697 so we need to compute these values again before we use
3cc3cb79043f Allocating a new weakref object can cause existing weakref objects for Fred Drake <fdrake@acm.org> parents: 31449 diff changeset	698 them. */
22607 ac24c2c9bcaf Remove weakref free list. This has the side effect of fixing a memory Neil Schemenauer <nascheme@enme.ucalgary.ca> parents: 21483 diff changeset	699 result = new_weakref(ob, callback);
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	700 if (result != NULL) {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	701 PyWeakReference *prev;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	702
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	703 if (PyCallable_Check(ob))
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	704 result->ob_type = &_PyWeakref_CallableProxyType;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	705 else
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	706 result->ob_type = &_PyWeakref_ProxyType;
31453 3cc3cb79043f Allocating a new weakref object can cause existing weakref objects for Fred Drake <fdrake@acm.org> parents: 31449 diff changeset	707 get_basic_refs(*list, &ref, &proxy);
32931 ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	708 if (callback == NULL) {
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	709 if (proxy != NULL) {
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	710 /* Someone else added a proxy without a callback
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	711 during GC. Return that one instead of this one
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	712 to avoid violating the invariants of the list
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	713 of weakrefs for ob. */
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	714 Py_DECREF(result);
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	715 Py_INCREF(result = proxy);
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	716 goto skip_insert;
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	717 }
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	718 prev = ref;
32931 ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	719 }
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	720 else
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	721 prev = (proxy == NULL) ? ref : proxy;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	722
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	723 if (prev == NULL)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	724 insert_head(result, list);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	725 else
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	726 insert_after(result, prev);
32931 ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	727 skip_insert:
ec71ae3bc2dd Be more careful about maintaining the invariants; it was actually Fred Drake <fdrake@acm.org> parents: 31453 diff changeset	728 ;
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	729 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	730 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	731 return (PyObject *) result;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	732 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	733
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	734
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	735 PyObject *
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	736 PyWeakref_GetObject(PyObject *ref)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	737 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	738 if (ref == NULL \|\| !PyWeakref_Check(ref)) {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	739 PyErr_BadInternalCall();
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	740 return NULL;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	741 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	742 return PyWeakref_GET_OBJECT(ref);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	743 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	744
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	745
21339 525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	746 static void
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	747 handle_callback(PyWeakReference ref, PyObject callback)
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	748 {
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	749 PyObject *cbresult = PyObject_CallFunction(callback, "O", ref);
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	750
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	751 if (cbresult == NULL)
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	752 PyErr_WriteUnraisable(callback);
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	753 else
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	754 Py_DECREF(cbresult);
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	755 }
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	756
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	757 /* This function is called by the tp_dealloc handler to clear weak references.
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	758 *
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	759 * This iterates through the weak references for 'object' and calls callbacks
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	760 * for those references which have one. It returns when all callbacks have
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	761 * been attempted.
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	762 */
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	763 void
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	764 PyObject_ClearWeakRefs(PyObject *object)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	765 {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	766 PyWeakReference **list;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	767
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	768 if (object == NULL
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	769 \|\| !PyType_SUPPORTS_WEAKREFS(object->ob_type)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	770 \|\| object->ob_refcnt != 0) {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	771 PyErr_BadInternalCall();
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	772 return;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	773 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	774 list = GET_WEAKREFS_LISTPTR(object);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	775 /* Remove the callback-less basic and proxy references */
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	776 if (list != NULL && (list)->wr_callback == NULL) {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	777 clear_weakref(*list);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	778 if (list != NULL && (list)->wr_callback == NULL)
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	779 clear_weakref(*list);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	780 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	781 if (*list != NULL) {
21339 525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	782 PyWeakReference current = list;
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	783 int count = _PyWeakref_GetWeakrefCount(current);
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	784 int restore_error = PyErr_Occurred() ? 1 : 0;
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	785 PyObject err_type, err_value, *err_tb;
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	786
21339 525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	787 if (restore_error)
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	788 PyErr_Fetch(&err_type, &err_value, &err_tb);
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	789 if (count == 1) {
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	790 PyObject *callback = current->wr_callback;
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	791
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	792 current->wr_callback = NULL;
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	793 clear_weakref(current);
21339 525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	794 handle_callback(current, callback);
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	795 Py_DECREF(callback);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	796 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	797 else {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	798 PyObject tuple = PyTuple_New(count 2);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	799 int i = 0;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	800
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	801 for (i = 0; i < count; ++i) {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	802 PyWeakReference *next = current->wr_next;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	803
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	804 Py_INCREF(current);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	805 PyTuple_SET_ITEM(tuple, i * 2, (PyObject *) current);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	806 PyTuple_SET_ITEM(tuple, i * 2 + 1, current->wr_callback);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	807 current->wr_callback = NULL;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	808 clear_weakref(current);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	809 current = next;
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	810 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	811 for (i = 0; i < count; ++i) {
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	812 PyObject current = PyTuple_GET_ITEM(tuple, i 2);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	813 PyObject callback = PyTuple_GET_ITEM(tuple, i 2 + 1);
21339 525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	814
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	815 handle_callback((PyWeakReference *)current, callback);
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	816 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	817 Py_DECREF(tuple);
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	818 }
21339 525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	819 if (restore_error)
525c77368cd0 Make sure that when we invoke callback functions associated with weak Fred Drake <fdrake@acm.org> parents: 21083 diff changeset	820 PyErr_Restore(err_type, err_value, err_tb);
20280 97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	821 }
97cfa461d793 The weak reference implementation, separated from the weakref module. Fred Drake <fdrake@acm.org> parents: diff changeset	822 }

Mercurial > cpython-lru_cache-weakref

annotate Objects/weakrefobject.c @ 32931:ec71ae3bc2dd 2.3