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Add support to NSObject for automatically zeroing __weak references when using ARC.

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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@33408 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
theraven 2011-06-29 13:13:15 +00:00
parent e3694a2266
commit 57aca2c837
1 changed files with 22 additions and 0 deletions
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22
Source/NSObject.m
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@ -72,6 +72,15 @@
#define IN_NSOBJECT_M 1
#import "GSPrivate.h"
#ifdef __GNUSTEP_RUNTIME__
#include <objc/capabilities.h>
#include <objc/hooks.h>
#ifdef OBJC_CAP_ARC
#include <objc/objc-arc.h>
#endif
#endif
/* When this is `YES', every call to release/autorelease, checks to
make sure isn't being set up to release itself too many times.
This does not need mutex protection. */
@ -993,8 +1002,18 @@ GSGarbageCollectorLog(char *msg, GC_word arg)
extern BOOL
objc_create_block_classes_as_subclasses_of(Class super);
#ifdef OBJC_CAP_ARC
static id gs_weak_load(id obj)
{
return (NSExtraRefCount(obj) + 1) > 0 ? obj : nil;
}
#endif
+ (void) load
{
#ifdef OBJC_CAP_ARC
_objc_weak_load = gs_weak_load;
#endif
objc_create_block_classes_as_subclasses_of(self);
}
@ -2029,6 +2048,9 @@ objc_create_block_classes_as_subclasses_of(Class super);
#if (GS_WITH_GC == 0)
if (NSDecrementExtraRefCountWasZero(self))
{
# ifdef OBJC_CAP_ARC
objc_delete_weak_refs(self);
# endif
[self dealloc];
}
#endif