diff options
Diffstat (limited to 'ptw32_InterlockedCompareExchange.c')
| -rw-r--r-- | ptw32_InterlockedCompareExchange.c | 56 |
1 files changed, 36 insertions, 20 deletions
diff --git a/ptw32_InterlockedCompareExchange.c b/ptw32_InterlockedCompareExchange.c index 7f996d5..0980710 100644 --- a/ptw32_InterlockedCompareExchange.c +++ b/ptw32_InterlockedCompareExchange.c @@ -50,30 +50,39 @@ * This can't be inlined because we need to know it's address so that * we can call it through a pointer. */ + PTW32_INTERLOCKED_LONG WINAPI -ptw32_InterlockedCompareExchange(PTW32_INTERLOCKED_LPLONG location, - PTW32_INTERLOCKED_LONG value, - PTW32_INTERLOCKED_LONG comparand) +ptw32_InterlockedCompareExchange (PTW32_INTERLOCKED_LPLONG location, + PTW32_INTERLOCKED_LONG value, + PTW32_INTERLOCKED_LONG comparand) { + +#if defined(__WATCOMC__) +/* Don't report that result is not assigned a value before being referenced */ +#pragma disable_message (200) +#endif + PTW32_INTERLOCKED_LONG result; +/* *INDENT-OFF* */ + #if defined(_M_IX86) || defined(_X86_) -#if defined(_MSC_VER) +#if defined(_MSC_VER) || defined(__WATCOMC__) _asm { - PUSH ecx - PUSH edx - MOV ecx,dword ptr [location] - MOV edx,dword ptr [value] - MOV eax,dword ptr [comparand] - LOCK CMPXCHG dword ptr [ecx],edx ; if (EAX == [ECX]), - ; [ECX] = EDX - ; else - ; EAX = [ECX] - MOV dword ptr [result], eax - POP edx - POP ecx + PUSH ecx + PUSH edx + MOV ecx,dword ptr [location] + MOV edx,dword ptr [value] + MOV eax,dword ptr [comparand] + LOCK CMPXCHG dword ptr [ecx],edx ; if (EAX == [ECX]), + ; [ECX] = EDX + ; else + ; EAX = [ECX] + MOV dword ptr [result], eax + POP edx + POP ecx } #elif defined(__GNUC__) @@ -81,10 +90,10 @@ ptw32_InterlockedCompareExchange(PTW32_INTERLOCKED_LPLONG location, __asm__ ( "lock\n\t" - "cmpxchgl %3,(%0)" /* if (EAX == [location]), */ - /* [location] = value */ - /* else */ - /* EAX = [location] */ + "cmpxchgl %3,(%0)" /* if (EAX == [location]), */ + /* [location] = value */ + /* else */ + /* EAX = [location] */ :"=r" (location), "=a" (result) :"0" (location), "q" (value), "a" (comparand) : "memory" ); @@ -104,5 +113,12 @@ ptw32_InterlockedCompareExchange(PTW32_INTERLOCKED_LPLONG location, #endif +/* *INDENT-ON* */ + return result; + +#if defined(__WATCOMC__) +#pragma enable_message (200) +#endif + } |