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GCC atomic built-ins are available patch to Blocks. - Credit to Bobby Powers. 

llvm-svn: 81615
This commit is contained in:
Edward O'Callaghan 2009-09-12 16:29:10 +00:00
parent d95f9608ab
commit 957fa1379c
1 changed files with 23 additions and 8 deletions
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31
compiler-rt/BlocksRuntime/runtime.c
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@ -28,24 +28,39 @@
#include <string.h> #include <string.h>
#include <stdint.h> #include <stdint.h>
#if !TARGET_OS_WIN32 #if TARGET_OS_MAC
#include <libkern/OSAtomic.h> #include <libkern/OSAtomic.h>
#else #elif TARGET_OS_WIN32
#define _CRT_SECURE_NO_WARNINGS 1 #define _CRT_SECURE_NO_WARNINGS 1
#include <windows.h> #include <windows.h>
static __inline bool OSAtomicCompareAndSwapLong(long oldl, long newl, long volatile *dst) static __inline bool OSAtomicCompareAndSwapLong(long oldl, long newl, long volatile *dst)
{ {
// fixme barrier is overkill -- see objc-os.h /* fixme barrier is overkill -- see objc-os.h */
long original = InterlockedCompareExchange(dst, newl, oldl); long original = InterlockedCompareExchange(dst, newl, oldl);
return (original == oldl); return (original == oldl);
} }
static __inline bool OSAtomicCompareAndSwapInt(int oldi, int newi, int volatile *dst) static __inline bool OSAtomicCompareAndSwapInt(int oldi, int newi, int volatile *dst)
{ {
// fixme barrier is overkill -- see objc-os.h /* fixme barrier is overkill -- see objc-os.h */
int original = InterlockedCompareExchange(dst, newi, oldi); int original = InterlockedCompareExchange(dst, newi, oldi);
return (original == oldi); return (original == oldi);
} }
/* check to see if the GCC atomic built-ins are available. if we're on
* a 64-bit system, make sure we have an 8-byte atomic function
* available.
*/
#elif __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 && \
((__SIZEOF_LONG__ != 8) || __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8)
static __inline bool OSAtomicCompareAndSwapLong(long oldl, long newl, long volatile *dst)
{
return __sync_bool_compare_and_swap(dst, oldl, newl);
}
static __inline bool OSAtomicCompareAndSwapInt(int oldi, int newi, int volatile *dst)
{
return __sync_bool_compare_and_swap(dst, oldi, newi);
}
#endif #endif