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- Use an event rather than a semaphore to wake up the thread that writes

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debug output to disk. Avoids bugchecking if the number of debug prints
before the thread wakes up exceeds the semaphore limit.

svn path=/trunk/; revision=8559
This commit is contained in:
David Welch 2004-03-07 04:38:41 +00:00
parent 7682e4ce80
commit ff81e5e1b0
1 changed files with 11 additions and 8 deletions
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19
reactos/ntoskrnl/kd/dlog.c
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@ -1,4 +1,4 @@
/* $Id: dlog.c,v 1.11 2004/01/05 14:28:20 weiden Exp $
/* $Id: dlog.c,v 1.12 2004/03/07 04:38:41 dwelch Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -31,7 +31,7 @@ static ULONG DebugLogOverflow;
static HANDLE DebugLogThreadHandle;
static CLIENT_ID DebugLogThreadCid;
static HANDLE DebugLogFile;
static KSEMAPHORE DebugLogSem;
static KEVENT DebugLogEvent;
/* FUNCTIONS *****************************************************************/
@ -43,7 +43,7 @@ DebugLogInit(VOID)
DebugLogEnd = 0;
DebugLogOverflow = 0;
DebugLogCount = 0;
KeInitializeSemaphore(&DebugLogSem, 0, 255);
KeInitializeEvent(&DebugLogEvent, NotificationEvent, FALSE);
}
VOID STDCALL
@ -56,11 +56,13 @@ DebugLogThreadMain(PVOID Context)
for (;;)
{
KeWaitForSingleObject(&DebugLogSem,
LARGE_INTEGER TimeOut;
TimeOut.QuadPart = -5000000; /* Half a second. */
KeWaitForSingleObject(&DebugLogEvent,
0,
KernelMode,
FALSE,
NULL);
&TimeOut);
KeAcquireSpinLock(&DebugLogLock, &oldIrql);
while (DebugLogCount > 0)
{
@ -103,6 +105,7 @@ DebugLogThreadMain(PVOID Context)
}
KeAcquireSpinLock(&DebugLogLock, &oldIrql);
}
KeResetEvent(&DebugLogEvent);
KeReleaseSpinLock(&DebugLogLock, oldIrql);
}
}
@ -167,7 +170,7 @@ DebugLogWrite(PCH String)
KeReleaseSpinLock(&DebugLogLock, oldIrql);
if (oldIrql < DISPATCH_LEVEL)
{
KeReleaseSemaphore(&DebugLogSem, IO_NO_INCREMENT, 1, FALSE);
KeSetEvent(&DebugLogEvent, IO_NO_INCREMENT, FALSE);
}
return;
}
@ -184,7 +187,7 @@ DebugLogWrite(PCH String)
KeReleaseSpinLock(&DebugLogLock, oldIrql);
if (oldIrql < DISPATCH_LEVEL)
{
KeReleaseSemaphore(&DebugLogSem, IO_NO_INCREMENT, 1, FALSE);
KeSetEvent(&DebugLogEvent, IO_NO_INCREMENT, FALSE);
}
return;
}
@ -195,7 +198,7 @@ DebugLogWrite(PCH String)
if (oldIrql < DISPATCH_LEVEL)
{
KeReleaseSemaphore(&DebugLogSem, IO_NO_INCREMENT, 1, FALSE);
KeSetEvent(&DebugLogEvent, IO_NO_INCREMENT, FALSE);
}
}