Leaked source code of windows server 2003
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//
// tracelog.c
//
// Copyright (c) 1996 FORE Systems, Inc.
// All rights reserved.
//
// THIS SOURCE CODE CONTAINS CONFIDENTIAL INFORMATION THAT IS OWNED BY FORE
// SYSTEMS, INC. AND MAY NOT BE COPIED, DISCLOSED OR OTHERWISE USED WITHOUT
// THE EXPRESS WRITTEN CONSENT OF FORE SYSTEMS, INC.
//
#include <precomp.h>
#include <stdlib.h>
#include <stdarg.h>
#pragma hdrstop
void
InitTraceLog(PTRACELOG TraceLog, unsigned char *Storage,
unsigned long StorageSizeBytes)
{
memset(TraceLog, 0, sizeof(TraceLog));
if (Storage == NULL)
return;
TraceLog->Storage = Storage;
TraceLog->StorageSizeBytes = StorageSizeBytes;
TraceLog->First = (PTRACEENTRY)TraceLog->Storage;
TraceLog->Last =
(PTRACEENTRY) (TraceLog->Storage +
((TraceLog->StorageSizeBytes / sizeof(TRACEENTRY)) * sizeof(TRACEENTRY)) -
sizeof(TRACEENTRY));
TraceLog->Current = TraceLog->First;
memset(TraceLog->Storage, 0, TraceLog->StorageSizeBytes);
}
void
TraceLogWrite(PTRACELOG TraceLog, unsigned long EventId, ...)
{
PTRACEENTRY TraceEntry;
unsigned long ParamCount;
unsigned long i;
va_list ap;
if (TraceLog->Storage == NULL)
return;
ACQUIRE_GLOBAL_LOCK(pAtmLaneGlobalInfo);
TraceEntry = TraceLog->Current;
ParamCount = TL_GET_PARAM_COUNT(EventId);
memset(TraceEntry, 0, sizeof(TRACEENTRY));
TraceEntry->EventId = EventId;
TraceEntry->Time = AtmLaneSystemTimeMs();
if (ParamCount > 0)
{
va_start(ap, EventId);
for(i = 0; i < ParamCount; i++)
TraceEntry->Params[i] = va_arg(ap, unsigned long);
}
if (TraceLog->Current >= TraceLog->Last)
TraceLog->Current = TraceLog->First;
else
TraceLog->Current++;
RELEASE_GLOBAL_LOCK(pAtmLaneGlobalInfo);
}