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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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16
reactos/ntoskrnl/ke/sem.c
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@ -24,7 +24,7 @@ VOID KeInitializeSemaphore(PKSEMAPHORE Semaphore,
KeInitializeDispatcherHeader(&Semaphore->Header,SemaphoreType, KeInitializeDispatcherHeader(&Semaphore->Header,SemaphoreType,
sizeof(KSEMAPHORE)/sizeof(ULONG), sizeof(KSEMAPHORE)/sizeof(ULONG),
Count); Count);
Semaphore->Limit = Limit; Semaphore->Limit=Limit;
} }
LONG KeReadStateSemaphore(PKSEMAPHORE Semaphore) LONG KeReadStateSemaphore(PKSEMAPHORE Semaphore)
@ -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;
if(initState == 0)
Semaphore->Header.SignalState += Adjustment;
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;
} }