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FunctionTimer.cpp
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FunctionTimer.cpp
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/* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla code.
*
* The Initial Developer of the Original Code is
* Mozilla Corporation.
* Portions created by the Initial Developer are Copyright (C) 2009
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Vladimir Vukicevic <vladimir@pobox.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
// needed to get vsnprintf with glibc
#ifndef _ISOC99_SOURCE
#define _ISOC99_SOURCE
#endif
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include "prenv.h"
#include "mozilla/FunctionTimer.h"
#ifdef _MSC_VER
#define vsnprintf _vsnprintf
#include <windows.h>
#include <mmsystem.h>
#endif
using namespace mozilla;
// This /must/ come before the call to InitTimers below,
// or its constructor will be called after we've already
// assigned the Now() value to it.
static TimeStamp sAppStart;
nsAutoPtr<FunctionTimerLog> FunctionTimer::sLog;
char *FunctionTimer::sBuf1 = nsnull;
char *FunctionTimer::sBuf2 = nsnull;
int FunctionTimer::sBufSize = FunctionTimer::InitTimers();
unsigned FunctionTimer::sDepth = 0;
int
FunctionTimer::InitTimers()
{
if (PR_GetEnv("MOZ_FT") == NULL)
return 0;
// ensure that this is initialized before us
TimeStamp::Startup();
sLog = new FunctionTimerLog(PR_GetEnv("MOZ_FT"));
sBuf1 = (char *) malloc(BUF_LOG_LENGTH);
sBuf2 = (char *) malloc(BUF_LOG_LENGTH);
sAppStart = TimeStamp::Now();
return BUF_LOG_LENGTH;
}
FunctionTimerLog::FunctionTimerLog(const char *fname)
: mLatest(sAppStart)
{
if (strcmp(fname, "stdout") == 0) {
mFile = stdout;
} else if (strcmp(fname, "stderr") == 0) {
mFile = stderr;
} else {
FILE *fp = fopen(fname, "wb");
if (!fp) {
NS_WARNING("FunctionTimerLog: Failed to open file specified, logging disabled!");
}
mFile = fp;
}
#ifdef _MSC_VER
// Get 1ms resolution on Windows
timeBeginPeriod(1);
#endif
}
FunctionTimerLog::~FunctionTimerLog()
{
if (mFile && mFile != stdout && mFile != stderr)
fclose((FILE*)mFile);
#ifdef _MSC_VER
timeEndPeriod(1);
#endif
}
void
FunctionTimerLog::LogString(const char *str)
{
if (mFile) {
mLatest = TimeStamp::Now();
TimeDuration elapsed = mLatest - sAppStart;
fprintf((FILE*)mFile, "[% 9.2f] %s\n", elapsed.ToSeconds() * 1000.0, str);
}
}
TimeDuration
FunctionTimerLog::LatestSinceStartup() const
{
return mLatest - sAppStart;
}
int
FunctionTimer::ft_vsnprintf(char *str, int maxlen, const char *fmt, va_list args)
{
return vsnprintf(str, maxlen, fmt, args);
}
int
FunctionTimer::ft_snprintf(char *str, int maxlen, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
int rval = ft_vsnprintf(str, maxlen, fmt, ap);
va_end(ap);
return rval;
}