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- Implement KeThawAllThreads based on KeFreezeAllThreads.

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- Fix a bug in KeFreezeAllThreads which was causing us never to actually parse the next flink.
- Fix a bug in KeFreezeAllThreads which was causing us never to leave the critical region we entered at the beginning.

svn path=/trunk/; revision=24613
This commit is contained in:
Alex Ionescu 2006-10-22 20:52:13 +00:00
parent 6943ab32d9
commit 024e1d9725
2 changed files with 77 additions and 0 deletions
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6
reactos/ntoskrnl/include/internal/ke.h
View file

@ -526,6 +526,12 @@ ULONG
NTAPI
KeForceResumeThread(IN PKTHREAD Thread);
VOID
NTAPI
KeThawAllThreads(
VOID
);
VOID
NTAPI
KeFreezeAllThreads(

71
reactos/ntoskrnl/ke/thrdobj.c
View file

@ -304,11 +304,17 @@ KeFreezeAllThreads(VOID)
/* Release the APC lock */
KiReleaseApcLockFromDpcLevel(&ApcLock);
/* Move to the next thread */
NextEntry = NextEntry->Flink;
}
/* Release the process lock and exit the dispatcher */
KiReleaseProcessLock(&LockHandle);
KiExitDispatcher(LockHandle.OldIrql);
/* Leave the critical region */
KeLeaveCriticalRegion();
}
ULONG
@ -573,6 +579,71 @@ KeSuspendThread(PKTHREAD Thread)
return PreviousCount;
}
VOID
NTAPI
KeThawAllThreads(VOID)
{
KLOCK_QUEUE_HANDLE LockHandle, ApcLock;
PKTHREAD Current, CurrentThread = KeGetCurrentThread();
PKPROCESS Process = CurrentThread->ApcState.Process;
PLIST_ENTRY ListHead, NextEntry;
LONG OldCount;
ASSERT_IRQL_LESS_OR_EQUAL(DISPATCH_LEVEL);
/* Lock the process */
KiAcquireProcessLock(Process, &LockHandle);
/* Enter a critical region */
KeEnterCriticalRegion();
/* Loop the Process's Threads */
ListHead = &Process->ThreadListHead;
NextEntry = ListHead->Flink;
while (NextEntry != ListHead)
{
/* Get the current thread */
Current = CONTAINING_RECORD(NextEntry, KTHREAD, ThreadListEntry);
/* Lock it */
KiAcquireApcLockAtDpcLevel(Current, &ApcLock);
/* Make sure we are frozen */
OldCount = Current->FreezeCount;
if (OldCount)
{
/* Decrease the freeze count */
Current->FreezeCount--;
/* Check if both counts are zero now */
if (!(Current->SuspendCount) && (!Current->FreezeCount))
{
/* Lock the dispatcher */
KiAcquireDispatcherLockAtDpcLevel();
/* Signal the suspend semaphore and wake it */
Current->SuspendSemaphore.Header.SignalState++;
KiWaitTest(&Current->SuspendSemaphore, 1);
/* Unlock the dispatcher */
KiReleaseDispatcherLockFromDpcLevel();
}
}
/* Release the APC lock */
KiReleaseApcLockFromDpcLevel(&ApcLock);
/* Go to the next one */
NextEntry = NextEntry->Flink;
}
/* Release the process lock and exit the dispatcher */
KiReleaseProcessLock(&LockHandle);
KiExitDispatcher(LockHandle.OldIrql);
/* Leave the critical region */
KeLeaveCriticalRegion();
}
BOOLEAN
NTAPI
KeTestAlertThread(IN KPROCESSOR_MODE AlertMode)