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/**
* @file llerrorstream.cpp
* @brief Implementation of c++ log straming.
*
* Copyright (c) 2002-2007, Linden Research, Inc.
*
* The source code in this file ("Source Code") is provided by Linden Lab
* to you under the terms of the GNU General Public License, version 2.0
* ("GPL"), unless you have obtained a separate licensing agreement
* ("Other License"), formally executed by you and Linden Lab. Terms of
* the GPL can be found in doc/GPL-license.txt in this distribution, or
* online at http://secondlife.com/developers/opensource/gplv2
*
* There are special exceptions to the terms and conditions of the GPL as
* it is applied to this Source Code. View the full text of the exception
* in the file doc/FLOSS-exception.txt in this software distribution, or
* online at http://secondlife.com/developers/opensource/flossexception
*
* By copying, modifying or distributing this software, you acknowledge
* that you have read and understood your obligations described above,
* and agree to abide by those obligations.
*
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
*/
#include "linden_common.h"
#include "llerrorstream.h"
#include "llerrorbuffer.h"
#include "llerror.h"
using namespace std;
// Define this if we're using APR mutexes.
#include "llapr.h"
extern apr_thread_mutex_t *gLogMutexp;
// In order to compile in Visual C++ 6.0, you must use std:: in the header, and then
// use the std namespace in the cpp. Otherwise, you'll break the (very) fragile C++ parser.
LLErrorStream::LLErrorStream(LLErrorBuffer *eb):
ostream(eb),
mErrorBuffer(eb),
mKill(FALSE),
mErrorCallback(NULL)
{
#ifdef SHOW_DEBUG
setErrorLevel(LLErrorBuffer::DEBUG);
#else
#ifdef SHOW_INFO
setErrorLevel(LLErrorBuffer::INFO);
#else
#ifdef SHOW_WARN
setErrorLevel(LLErrorBuffer::WARN);
#else
setErrorLevel(LLErrorBuffer::FATAL);
#endif // SHOW_WARN
#endif // SHOW_INFO
#endif // SHOW_DEBUG
setDebugMask(LLERR_NONE);
setPrintLocation(FALSE);
}
LLErrorBuffer::ELevel LLErrorStream::ELevelToBufferELevel(const ELevel l)
{
switch (l)
{
case DEBUG:
return LLErrorBuffer::DEBUG;
case INFO:
return LLErrorBuffer::INFO;
case WARN:
return LLErrorBuffer::WARN;
case FATAL:
return LLErrorBuffer::FATAL;
default:
return LLErrorBuffer::FATAL;
}
}
LLErrorStream::ELevel LLErrorStream::BufferELevelToELevel(const LLErrorBuffer::ELevel l)
{
switch(l)
{
case LLErrorBuffer::DEBUG:
return DEBUG;
case LLErrorBuffer::INFO:
return INFO;
case LLErrorBuffer::WARN:
return WARN;
case LLErrorBuffer::FATAL:
return FATAL;
default:
return FATAL;
}
}
BOOL LLErrorStream::isEnabledFor(const LLErrorBuffer::ELevel l)
{
if (l == LLErrorBuffer::FATAL)
{
if (LLErrorBuffer::FATAL < getErrorLevel())
{
// Fatal error, but we're at log level NONE (used by signal handlers)
// We want to crash this process now instead of logging
_llcrash_and_loop();
}
}
// Always returns false if not safe (recursive call)
return (getErrorLevel() <= l);
}
BOOL LLErrorStream::isEnabledFor(const LLErrorBuffer::ELevel l, const U32 type)
{
// Always returns false if not safe (recursive call)
return (getErrorLevel() <= l) && (mDebugMask & type);
}
void LLErrorStream::crashOnError(std::ostringstream &oss, LLErrorBuffer::ELevel l)
{
if (gLogMutexp)
{
const S32 MAX_RETRIES = 5;
S32 attempts = 0;
while (attempts < MAX_RETRIES)
{
apr_status_t s = apr_thread_mutex_trylock(gLogMutexp);
if (!APR_STATUS_IS_EBUSY(s))
{
break;
}
else
{
attempts++;
ms_sleep(1);
//
// Just yielding won't necessarily work, I had problems with this on Linux - doug 12/02/04
//apr_thread_yield();
}
}
if (attempts == MAX_RETRIES)
{
// We're hosed, we can't get the mutex.
// I guess we just won't log, then. Blah.
fprintf(stderr, "LLErrorStream::crashOnError() failed to get mutex for log\n");
return;
}
}
mErrorBuffer->setPriority(l);
if (LLErrorBuffer::FATAL == l)
{
setError();
}
*this << oss.str();
if (mKill)
{
// We want to flush this stream.
flush();
}
BOOL crashme = FALSE;
if (mKill)
{
crashme = TRUE;
}
mKill = FALSE;
if (gLogMutexp)
{
apr_thread_mutex_unlock(gLogMutexp);
}
if (crashme)
{
mErrorCallback(oss.str());
_llcrash_and_loop();
}
}
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