diff options
Diffstat (limited to 'winsup/cygwin/winbase.h')
| -rw-r--r-- | winsup/cygwin/winbase.h | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/winsup/cygwin/winbase.h b/winsup/cygwin/winbase.h index 18f0be344..eec196d53 100644 --- a/winsup/cygwin/winbase.h +++ b/winsup/cygwin/winbase.h @@ -38,22 +38,31 @@ ilockdecr (volatile long *m) extern __inline__ long ilockexch (volatile long *t, long v) { - register int __res; - __asm__ __volatile__ ("\n\ -1: lock cmpxchgl %3,(%1)\n\ - jne 1b\n\ - ": "=a" (__res), "=q" (t): "1" (t), "q" (v), "0" (*t): "cc"); - return __res; + return + ({ + register __typeof (*t) ret __asm ("%eax"); + __asm __volatile ("\n" + "1: lock cmpxchgl %2, %1\n" + " jne 1b\n" + : "=a" (ret), "=m" (*t) + : "r" (v), "m" (*t), "0" (*t) + : "memory"); + ret; + }); } extern __inline__ long ilockcmpexch (volatile long *t, long v, long c) { - register int __res; - __asm__ __volatile__ ("\n\ - lock cmpxchgl %3,(%1)\n\ - ": "=a" (__res), "=q" (t) : "1" (t), "q" (v), "0" (c): "cc"); - return __res; + return + ({ + register __typeof (*t) ret __asm ("%eax"); + __asm __volatile ("lock cmpxchgl %2, %1" + : "=a" (ret), "=m" (*t) + : "r" (v), "m" (*t), "0" (c) + : "memory"); + ret; + }); } #undef InterlockedIncrement |