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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 #define IN_NSOBJECT_M 1
#import "GSPrivate.h" #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 /* When this is `YES', every call to release/autorelease, checks to
make sure isn't being set up to release itself too many times. make sure isn't being set up to release itself too many times.
This does not need mutex protection. */ This does not need mutex protection. */
@ -993,8 +1002,18 @@ GSGarbageCollectorLog(char *msg, GC_word arg)
extern BOOL extern BOOL
objc_create_block_classes_as_subclasses_of(Class super); 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 + (void) load
{ {
#ifdef OBJC_CAP_ARC
_objc_weak_load = gs_weak_load;
#endif
objc_create_block_classes_as_subclasses_of(self); 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 (GS_WITH_GC == 0)
if (NSDecrementExtraRefCountWasZero(self)) if (NSDecrementExtraRefCountWasZero(self))
{ {
# ifdef OBJC_CAP_ARC
objc_delete_weak_refs(self);
# endif
[self dealloc]; [self dealloc];
} }
#endif #endif