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- Acquire the dispatcher database lock in PsBlockThread if the caller didn't

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acquire this lock. This prevents from dead locks on smp machines.

svn path=/trunk/; revision=11840
This commit is contained in:
Hartmut Birr 2004-11-27 16:52:35 +00:00
parent 6c0c99c180
commit e64b5d5945
1 changed files with 11 additions and 10 deletions
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21
reactos/ntoskrnl/ps/thread.c
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@ -1,4 +1,4 @@
/* $Id: thread.c,v 1.138 2004/11/01 19:10:07 hbirr Exp $
/* $Id: thread.c,v 1.139 2004/11/27 16:52:35 hbirr Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -490,16 +490,20 @@ PsBlockThread(PNTSTATUS Status, UCHAR Alertable, ULONG WaitMode,
PETHREAD Thread;
PKWAIT_BLOCK WaitBlock;
KeAcquireSpinLock(&PiThreadLock, &oldIrql);
if (!DispatcherLock)
{
oldIrql = KeAcquireDispatcherDatabaseLock();
KiAcquireSpinLock(&PiThreadLock);
}
else
{
KeAcquireSpinLock(&PiThreadLock, &oldIrql);
}
KThread = KeGetCurrentThread();
Thread = CONTAINING_RECORD (KThread, ETHREAD, Tcb);
if (KThread->ApcState.KernelApcPending)
{
if (!DispatcherLock)
{
KeAcquireDispatcherDatabaseLockAtDpcLevel();
}
WaitBlock = (PKWAIT_BLOCK)Thread->Tcb.WaitBlockList;
while (WaitBlock)
{
@ -516,10 +520,7 @@ PsBlockThread(PNTSTATUS Status, UCHAR Alertable, ULONG WaitMode,
}
else
{
if (DispatcherLock)
{
KeReleaseDispatcherDatabaseLockFromDpcLevel();
}
KeReleaseDispatcherDatabaseLockFromDpcLevel();
Thread->Tcb.Alertable = Alertable;
Thread->Tcb.WaitMode = (UCHAR)WaitMode;
Thread->Tcb.WaitIrql = WaitIrql;