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Merged revisions 74524 via svnmerge from

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........
  r74524 | gregory.p.smith | 2009-08-20 04:39:38 -0500 (Thu, 20 Aug 2009) | 2 lines

  Add weakref support to the thread.lock type.
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This commit is contained in:
Benjamin Peterson 2009-10-10 01:16:07 +00:00
parent bf2e0aaf41
commit bec4d57a39
2 changed files with 9 additions and 1 deletions
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3
Doc/library/weakref.rst
View File

@ -61,6 +61,9 @@ instances, functions written in Python (but not in C), instance methods, sets,
frozensets, file objects, :term:`generator`\s, type objects, sockets, arrays,
deques, and regular expression pattern objects.
.. versionchanged:: 3.2
Added support for thread.lock and threading.Lock.
Several built-in types such as :class:`list` and :class:`dict` do not directly
support weak references but can add support through subclassing::

7
Modules/_threadmodule.c
View File

@ -3,6 +3,7 @@
/* Interface to Sjoerd's portable C thread library */
#include "Python.h"
#include "structmember.h" /* offsetof */
#ifndef WITH_THREAD
#error "Error! The rest of Python is not compiled with thread support."
@ -20,12 +21,15 @@ static PyObject *ThreadError;
typedef struct {
PyObject_HEAD
PyThread_type_lock lock_lock;
PyObject *in_weakreflist;
} lockobject;
static void
lock_dealloc(lockobject *self)
{
assert(self->lock_lock);
if (self->in_weakreflist != NULL)
PyObject_ClearWeakRefs((PyObject *) self);
/* Unlock the lock so it's safe to free it */
PyThread_acquire_lock(self->lock_lock, 0);
PyThread_release_lock(self->lock_lock);
@ -145,7 +149,7 @@ static PyTypeObject Locktype = {
0, /*tp_traverse*/
0, /*tp_clear*/
0, /*tp_richcompare*/
0, /*tp_weaklistoffset*/
offsetof(lockobject, in_weakreflist), /*tp_weaklistoffset*/
0, /*tp_iter*/
0, /*tp_iternext*/
lock_methods, /*tp_methods*/
@ -159,6 +163,7 @@ newlockobject(void)
if (self == NULL)
return NULL;
self->lock_lock = PyThread_allocate_lock();
self->in_weakreflist = NULL;
if (self->lock_lock == NULL) {
PyObject_Del(self);
self = NULL;