gecko/xpcom/base/FunctionTimer.h
2012-05-21 12:12:37 +01:00

254 lines
7.5 KiB
C++

/* -*- Mode: C++; tab-width: 40; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_FunctionTimer_h
#define mozilla_FunctionTimer_h
#include <stdarg.h>
#include "mozilla/TimeStamp.h"
#include "nscore.h"
#include "nsAutoPtr.h"
#if defined(NS_FORCE_FUNCTION_TIMER) && !defined(NS_FUNCTION_TIMER)
#define NS_FUNCTION_TIMER
#endif
/*
* Shortcut macros
*/
#ifdef NS_FUNCTION_TIMER
#ifdef __GNUC__
#define MOZ_FUNCTION_NAME __PRETTY_FUNCTION__
#elif defined(_MSC_VER)
#define MOZ_FUNCTION_NAME __FUNCTION__
#else
#warning "Define a suitable MOZ_FUNCTION_NAME for this platform"
#define MOZ_FUNCTION_NAME ""
#endif
// Add a timer for this function, from this declaration until the
// function returns. The function name will be used as the
// log string, and both function entry and exit will be printed.
#define NS_TIME_FUNCTION \
mozilla::FunctionTimer ft__autogen("%s (line %d)", MOZ_FUNCTION_NAME, __LINE__)
// Add a timer for this block, but print only a) if the exit time is
// greater than the given number of milliseconds; or b) if the
// mark-to-mark time is greater than the given number of milliseconds.
// No function entry will be printed. If the value given is negative,
// no function entry or exit will ever be printed, but all marks will.
#define NS_TIME_FUNCTION_MIN(_ms) \
mozilla::FunctionTimer ft__autogen((_ms), "%s (line %d)", MOZ_FUNCTION_NAME, __LINE__)
// Add a timer for this block, but print only marks, not function
// entry and exit. The same as calling the above macro with a negative value.
#define NS_TIME_FUNCTION_MARK_ONLY \
mozilla::FunctionTimer ft__autogen((-1), "%s (line %d)", MOZ_FUNCTION_NAME, __LINE__)
// Add a timer for this block, using the printf-style format.
// Both function entry and exit will be printed.
#define NS_TIME_FUNCTION_FMT(...) \
mozilla::FunctionTimer ft__autogen(__VA_ARGS__)
// Add a timer for this block, using the given minimum number of
// milliseconds and the given printf-style format. No function entry
// will be printed.
#define NS_TIME_FUNCTION_MIN_FMT(_ms, ...) \
mozilla::FunctionTimer ft__autogen((_ms), __VA_ARGS__)
// Add a midway mark for the current timer; an existing timer must
// have already been created using one of the above macros. The
// string given by the printf-style format will be logged, as well as
// the total elapsed time since the creation of the timer, and the
// time since the last mark.
#define NS_TIME_FUNCTION_MARK(...) \
ft__autogen.Mark(__VA_ARGS__)
// A double value representing the time elapsed since NS_TIME_FUNCTION
// initialization, in ms.
#define NS_TIME_FUNCTION_ELAPSED \
ft__autogen.Elapsed()
// A double value representing the time elapsed since the last
// NS_TIME_FUNCTION_MARK, in ms.
#define NS_TIME_FUNCTION_ELAPSED_SINCE_MARK \
ft__autogen.ElapsedSinceMark
// A TimeDuration value representing the elapsed time between the
// last logged event of any sort and the app startup.
#define NS_TIME_FUNCTION_LATEST \
mozilla::FunctionTimer::LatestSinceStartup()
#else
#define NS_TIME_FUNCTION do { } while (0)
#define NS_TIME_FUNCTION_MIN(_ms) do { } while (0)
#define NS_TIME_FUNCTION_MARK_ONLY do { } while (0)
#define NS_TIME_FUNCTION_FMT(...) do { } while (0)
#define NS_TIME_FUNCTION_MIN_FMT(_ms, ...) do { } while (0)
#define NS_TIME_FUNCTION_MARK(...) do { } while (0)
#define NS_TIME_FUNCTION_ELAPSED (0)
#define NS_TIME_FUNCTION_ELAPSED_SINCE_MARK (0)
#define NS_TIME_FUNCTION_LATEST (mozilla::TimeDuration(0))
#endif
namespace mozilla {
class FunctionTimerLog
{
public:
FunctionTimerLog(const char *fname);
~FunctionTimerLog();
void LogString(const char *str);
TimeDuration LatestSinceStartup() const;
private:
void *mFile;
TimeStamp mLatest;
};
class FunctionTimer
{
static nsAutoPtr<FunctionTimerLog> sLog;
static char *sBuf1;
static char *sBuf2;
static int sBufSize;
static unsigned sDepth;
enum { BUF_LOG_LENGTH = 1024 };
public:
static int InitTimers();
static int ft_vsnprintf(char *str, int maxlen, const char *fmt, va_list args);
static int ft_snprintf(char *str, int maxlen, const char *fmt, ...);
static void LogMessage(const char *s, ...) {
va_list ap;
va_start(ap, s);
if (sLog) {
ft_vsnprintf(sBuf1, sBufSize, s, ap);
sLog->LogString(sBuf1);
}
va_end(ap);
}
private:
void Init(const char *s, va_list ap) {
if (mEnabled) {
TimeInit();
ft_vsnprintf(mString, BUF_LOG_LENGTH, s, ap);
ft_snprintf(sBuf1, sBufSize, "> (% 3d)%*s|%s%s", mDepth, mDepth, " ", mHasMinMs ? "?MINMS " : "", mString);
sLog->LogString(sBuf1);
}
}
public:
inline void TimeInit() {
if (mEnabled) {
mStart = TimeStamp::Now();
mLastMark = mStart;
}
}
inline double Elapsed() {
if (mEnabled)
return (TimeStamp::Now() - mStart).ToSeconds() * 1000.0;
return 0.0;
}
inline double ElapsedSinceMark() {
if (mEnabled)
return (TimeStamp::Now() - mLastMark).ToSeconds() * 1000.0;
return 0.0;
}
static inline TimeDuration LatestSinceStartup() {
return sLog ? sLog->LatestSinceStartup() : TimeDuration(0);
}
FunctionTimer(double minms, const char *s, ...)
: mMinMs(minms), mHasMinMs(true),
mEnabled(sLog && s && *s), mDepth(++sDepth)
{
va_list ap;
va_start(ap, s);
Init(s, ap);
va_end(ap);
}
FunctionTimer(const char *s, ...)
: mMinMs(0.0), mHasMinMs(false),
mEnabled(sLog && s && *s), mDepth(++sDepth)
{
va_list ap;
va_start(ap, s);
Init(s, ap);
va_end(ap);
}
void Mark(const char *s, ...)
{
va_list ap;
va_start(ap, s);
if (mEnabled) {
ft_vsnprintf(sBuf1, sBufSize, s, ap);
TimeStamp now(TimeStamp::Now());
double ms = (now - mStart).ToSeconds() * 1000.0;
double msl = (now - mLastMark).ToSeconds() * 1000.0;
mLastMark = now;
ft_snprintf(sBuf2, sBufSize, "* (% 3d)%*s|%s%9.2f ms (%9.2f ms total) - %s [%s]", mDepth, mDepth, " ",
(!mHasMinMs || mMinMs < 0.0 || msl > mMinMs) ? "<MINMS " : "", msl, ms, mString, sBuf1);
sLog->LogString(sBuf2);
}
va_end(ap);
}
~FunctionTimer() {
if (mEnabled) {
TimeStamp now(TimeStamp::Now());
double ms = (now - mStart).ToSeconds() * 1000.0;
double msl = (now - mLastMark).ToSeconds() * 1000.0;
ft_snprintf(sBuf1, sBufSize, "< (% 3d)%*s|%s%9.2f ms (%9.2f ms total) - %s", mDepth, mDepth, " ",
(!mHasMinMs || (mMinMs >= 0.0 && msl > mMinMs)) ? "" : "<MINMS ", msl, ms, mString);
sLog->LogString(sBuf1);
}
--sDepth;
}
TimeStamp mStart, mLastMark;
const double mMinMs;
char mString[BUF_LOG_LENGTH+1];
const bool mHasMinMs;
const bool mEnabled;
const unsigned mDepth;
};
} // namespace mozilla
#endif // mozilla_FunctionTimer_h