Added implementations for InterlockedExchangeAdd() and

InterlockedCompareExchange().
This commit is contained in:
Rein Klazes 1998-11-14 18:21:32 +00:00 committed by Alexandre Julliard
parent 7b06d98404
commit 6df25e8004
2 changed files with 72 additions and 3 deletions

View File

@ -893,8 +893,8 @@ init MAIN_KernelInit
875 stdcall GetFileAttributesExW(wstr long ptr) GetFileAttributesEx32W 875 stdcall GetFileAttributesExW(wstr long ptr) GetFileAttributesEx32W
876 stub GetProcessPriorityBoost 876 stub GetProcessPriorityBoost
877 stub GetThreadPriorityBoost 877 stub GetThreadPriorityBoost
878 stub InterlockedCompareExchange 878 stdcall InterlockedCompareExchange (ptr long long) InterlockedCompareExchange
879 stub InterlockedExchangeAdd 879 stdcall InterlockedExchangeAdd (ptr long ) InterlockedExchangeAdd
880 stdcall IsProcessorFeaturePresent(long) IsProcessorFeaturePresent 880 stdcall IsProcessorFeaturePresent(long) IsProcessorFeaturePresent
881 stub OpenWaitableTimerA 881 stub OpenWaitableTimerA
882 stub OpenWaitableTimerW 882 stub OpenWaitableTimerW

View File

@ -7,7 +7,7 @@
#include <unistd.h> #include <unistd.h>
#include <string.h> #include <string.h>
#include "windows.h" #include "winnt.h"
#include "winbase.h" #include "winbase.h"
#include "winerror.h" #include "winerror.h"
#include "debug.h" #include "debug.h"
@ -131,3 +131,72 @@ LONG WINAPI InterlockedExchange(
return ret; return ret;
#endif #endif
} }
/************************************************************************
* InterlockedCompareExchange [KERNEL32.879]
*
* Atomically compares Destination and Comperand, and if found equal exchanges
* the value of Destination with Exchange
*
* RETURNS
* Prior value of value pointed to by Destination
*/
PVOID WINAPI InterlockedCompareExchange(
PVOID *Destination, /* Address of 32-bit value to exchange */
PVOID Exchange, /* change value, 32 bits */
PVOID Comperand /* value to compare, 32 bits */
) {
#if defined(__i386__)&&defined(__GNUC__)
PVOID ret;
__asm__ ( /* lock for SMP systems */
"lock\n\t"
"cmpxchgl %2,(%1)"
:"=r" (ret)
:"r" (Destination),"r" (Exchange), "0" (Comperand)
:"memory" );
return ret;
#else
PVOID ret;
/* StopAllThreadsAndProcesses() */
ret=*Destination;
if(*Destination==Comperand) *Destination=Exchange;
/* ResumeAllThreadsAndProcesses() */
return ret;
#endif
}
/************************************************************************
* InterlockedExchangeAdd [KERNEL32.880]
*
* Atomically adds Increment to Addend and returns the previous value of
* Addend
*
* RETURNS
* Prior value of value pointed to by cwAddendTarget
*/
LONG WINAPI InterlockedExchangeAdd(
PLONG Addend, /* Address of 32-bit value to exchange */
LONG Increment /* Value to add */
) {
#if defined(__i386__)&&defined(__GNUC__)
LONG ret;
__asm__ ( /* lock for SMP systems */
"lock\n\t"
"xaddl %0,(%1)"
:"=r" (ret)
:"r" (Addend), "0" (Increment)
:"memory" );
return ret;
#else
LONG ret;
/* StopAllThreadsAndProcesses() */
ret = *Addend;
*Addend += Increment;
/* ResumeAllThreadsAndProcesses() */
return ret;
#endif
}