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fixed thread dispatcher bug with spin lock

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svn path=/trunk/; revision=861
This commit is contained in:
Phillip Susi 1999-12-12 00:49:00 +00:00
parent 5d2dc4de65
commit a590b25e46
1 changed files with 8 additions and 10 deletions
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18
reactos/ntoskrnl/ps/thread.c
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@ -1,4 +1,4 @@
/* $Id: thread.c,v 1.36 1999/12/11 17:26:43 phreak Exp $
/* $Id: thread.c,v 1.37 1999/12/12 00:49:00 phreak Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -46,7 +46,7 @@ KSPIN_LOCK PiThreadListLock;
/*
* PURPOSE: List of threads associated with each priority level
*/
static LIST_ENTRY PiThreadListHead;
static LIST_ENTRY PiThreadListHead = { &PiThreadListHead, &PiThreadListHead };
static LIST_ENTRY PriorityListHead[NR_THREAD_PRIORITY_LEVELS];
static BOOLEAN DoneInitYet = FALSE;
ULONG PiNrThreads = 0;
@ -148,8 +148,6 @@ VOID PsReapThreads(VOID)
// DPRINT1("PsReapThreads()\n");
KeAcquireSpinLock(&PiThreadListLock, &oldIrql);
current_entry = PiThreadListHead.Flink;
while (current_entry != &PiThreadListHead)
@ -166,8 +164,6 @@ VOID PsReapThreads(VOID)
ObDereferenceObject(current);
}
}
KeReleaseSpinLock(&PiThreadListLock, oldIrql);
}
static PETHREAD PsScanThreadList (KPRIORITY Priority)
@ -217,7 +213,6 @@ static VOID PsDispatchThreadNoLock (ULONG NewThreadStatus)
Candidate = PsScanThreadList(CurrentPriority);
if (Candidate == CurrentThread)
{
KeReleaseSpinLockFromDpcLevel(&PiThreadListLock);
return;
}
if (Candidate != NULL)
@ -228,9 +223,12 @@ static VOID PsDispatchThreadNoLock (ULONG NewThreadStatus)
CurrentThread = Candidate;
KeReleaseSpinLockFromDpcLevel(&PiThreadListLock);
HalTaskSwitch(&CurrentThread->Tcb);
KeReleaseSpinLockFromDpcLevel( &PiThreadListLock );
HalTaskSwitch(&CurrentThread->Tcb);
KeAcquireSpinLockAtDpcLevel( &PiThreadListLock );
DPRINT( "Woken up, grabbed lock\n" );
PsReapThreads();
DPRINT( "Reaped\n" );
return;
}
}
@ -253,7 +251,7 @@ VOID PsDispatchThread(ULONG NewThreadStatus)
KeAcquireSpinLock(&PiThreadListLock, &oldIrql);
CurrentThread->Tcb.WaitIrql = oldIrql; // save wait Irql
PsDispatchThreadNoLock(NewThreadStatus);
// KeReleaseSpinLock(&PiThreadListLock, oldIrql);
KeReleaseSpinLock(&PiThreadListLock, oldIrql);
KeLowerIrql(oldIrql);
// DPRINT("oldIrql %d\n",oldIrql);
}