diff options
Diffstat (limited to 'winsup/cygwin/winbase.h')
| -rw-r--r-- | winsup/cygwin/winbase.h | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/winsup/cygwin/winbase.h b/winsup/cygwin/winbase.h index d9c53cfba..666f74a2d 100644 --- a/winsup/cygwin/winbase.h +++ b/winsup/cygwin/winbase.h @@ -11,7 +11,6 @@ details. */ #ifndef _WINBASE2_H #define _WINBASE2_H -#ifndef __x86_64__ extern __inline__ LONG ilockcmpexch (volatile LONG *t, LONG v, LONG c) { @@ -29,7 +28,30 @@ ilockcmpexch (volatile LONG *t, LONG v, LONG c) #undef InterlockedCompareExchange #define InterlockedCompareExchange ilockcmpexch #undef InterlockedCompareExchangePointer + +#ifdef __x86_64__ +extern __inline__ LONGLONG +ilockcmpexch64 (volatile LONGLONG *t, LONGLONG v, LONGLONG c) +{ + return + ({ + register LONGLONG ret __asm ("%rax"); + __asm __volatile ("lock cmpxchgq %2, %1" + : "=a" (ret), "=m" (*t) + : "r" (v), "m" (*t), "0" (c) + : "memory"); + ret; + }); +} + +#define InterlockedCompareExchange64 ilockcmpexch64 +#define InterlockedCompareExchangePointer(d,e,c) \ + (PVOID)InterlockedCompareExchange64((LONGLONG volatile *)(d),(LONGLONG)(e),(LONGLONG)(c)) + +#else + #define InterlockedCompareExchangePointer(d,e,c) \ (PVOID)InterlockedCompareExchange((LONG volatile *)(d),(LONG)(e),(LONG)(c)) + #endif /* !__x86_64 */ #endif /*_WINBASE2_H*/ |