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fixed sync bug by elevating IRQL

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svn path=/trunk/; revision=825
This commit is contained in:
Phillip Susi 1999-12-05 08:30:10 +00:00
parent bb25ff0f3a
commit f9d4545552
1 changed files with 7 additions and 3 deletions
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10
reactos/ntoskrnl/ke/dpc.c
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@ -6,8 +6,9 @@
* PROGRAMMER: David Welch (welch@mcmail.com)
* UPDATE HISTORY:
* 28/05/98: Created
* 12/3/99: Phillip Susi: Fixed IRQL problem
*/
/*
* NOTE: See also the higher level support routines in ntoskrnl/io/dpc.c
*/
@ -101,7 +102,8 @@ BOOLEAN KeRemoveQueueDpc(PKDPC Dpc)
{
KIRQL oldIrql;
KeAcquireSpinLock(&DpcQueueLock, &oldIrql);
KeAcquireSpinLockAtDpcLevel( &DpcQueueLock );
KeRaiseIrql( HIGH_LEVEL, &oldIrql );
if (!Dpc->Lock)
{
KeReleaseSpinLock(&DpcQueueLock, oldIrql);
@ -126,6 +128,7 @@ BOOLEAN KeInsertQueueDpc(PKDPC dpc, PVOID SystemArgument1,
* FALSE otherwise
*/
{
KIRQL oldlvl;
DPRINT("KeInsertQueueDpc(dpc %x, SystemArgument1 %x, SystemArgument2 %x)\n",
dpc, SystemArgument1, SystemArgument2);
@ -139,11 +142,12 @@ BOOLEAN KeInsertQueueDpc(PKDPC dpc, PVOID SystemArgument1,
{
return(FALSE);
}
KeRaiseIrql( HIGH_LEVEL, &oldlvl );
KeAcquireSpinLockAtDpcLevel(&DpcQueueLock);
InsertHeadList(&DpcQueueHead,&dpc->DpcListEntry);
DPRINT("dpc->DpcListEntry.Flink %x\n", dpc->DpcListEntry.Flink);
DpcQueueSize++;
KeReleaseSpinLockFromDpcLevel(&DpcQueueLock);
KeReleaseSpinLock( &DpcQueueLock, oldlvl );
dpc->Lock=(PULONG)1;
DPRINT("DpcQueueHead.Flink %x\n",DpcQueueHead.Flink);
DPRINT("Leaving KeInsertQueueDpc()\n",0);