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correct bug in release of semaphore

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svn path=/trunk/; revision=356
This commit is contained in:
jean 1999-03-31 13:38:13 +00:00
parent 3763d9c0dd
commit d7acbe2251
1 changed files with 13 additions and 21 deletions
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10
reactos/ntoskrnl/ke/sem.c
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@ -38,25 +38,17 @@ LONG KeReleaseSemaphore(PKSEMAPHORE Semaphore,
BOOLEAN Wait) BOOLEAN Wait)
{ {
ULONG initState = Semaphore->Header.SignalState; ULONG initState = Semaphore->Header.SignalState;
KeAcquireDispatcherDatabaseLock(Wait); KeAcquireDispatcherDatabaseLock(Wait);
if(Semaphore->Limit < initState+Adjustment if(Semaphore->Limit < initState+Adjustment
|| initState > initState+Adjustment) || initState > initState+Adjustment)
{
ExRaiseStatus(STATUS_SEMAPHORE_LIMIT_EXCEEDED); ExRaiseStatus(STATUS_SEMAPHORE_LIMIT_EXCEEDED);
}
Semaphore->Header.SignalState+=Adjustment; Semaphore->Header.SignalState+=Adjustment;
if(initState == 0) if(initState == 0)
{ {
// wake up SignalState waiters // wake up SignalState waiters
while(Semaphore->Header.SignalState > 0 KeDispatcherObjectWake(&Semaphore->Header) ;
&& KeDispatcherObjectWake(&Semaphore->Header)) ;
} }
KeReleaseDispatcherDatabaseLock(Wait); KeReleaseDispatcherDatabaseLock(Wait);
return initState; return initState;
} }