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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
/*
Sonic Visualiser
An audio file viewer and annotation editor.
Centre for Digital Music, Queen Mary, University of London.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version. See the file
COPYING included with this distribution for more information.
*/
/*
This is a modified version of a source file from the
Rosegarden MIDI and audio sequencer and notation editor.
This file copyright 2000-2006 Chris Cannam, Guillaume Laurent,
and QMUL.
*/
#ifndef SV_PROFILER_H
#define SV_PROFILER_H
#include "system/System.h"
#include <map>
#include <chrono>
#include <QMutex>
//#define NO_TIMING 1
//#define WANT_TIMING 1
#ifdef NDEBUG
#ifndef WANT_TIMING
#define NO_TIMING 1
#endif
#endif
namespace sv {
/**
* Profiling classes
*/
/**
* The class holding all profiling data
*
* This class is a singleton
*/
class Profiles
{
public:
static Profiles* getInstance();
~Profiles();
typedef std::chrono::steady_clock::duration Duration;
#ifndef NO_TIMING
void accumulate(const char* id, Duration duration);
#endif
void dump();
protected:
Profiles();
#ifndef NO_TIMING
typedef std::pair<int, Duration> ProfilePair;
typedef std::map<const char *, ProfilePair> ProfileMap;
typedef std::map<const char *, Duration> LastCallMap;
typedef std::map<const char *, Duration> WorstCallMap;
ProfileMap m_profiles;
LastCallMap m_lastCalls;
WorstCallMap m_worstCalls;
QMutex m_mutex;
#endif
static Profiles* m_instance;
};
#ifndef NO_TIMING
/**
* Profile point instance class. Construct one of these on the stack
* at the start of a function, in order to record the time consumed
* within that function. The profiler object should be effectively
* optimised out if NO_TIMING is defined, so any overhead in a release
* build should be negligible so long as you remember to define that.
*/
class Profiler
{
public:
/**
* Create a profile point instance that records time consumed
* against the given profiling point name. If showOnDestruct is
* true, the time consumed will be printed to stderr when the
* object is destroyed; otherwise, only the accumulated, mean and
* worst-case times will be shown when the program exits or
* Profiles::dump() is called.
*/
Profiler(const char *name, bool showOnDestruct = false);
~Profiler();
void update() const;
void end(); // same action as dtor
protected:
const char* m_c;
std::chrono::time_point<std::chrono::steady_clock> m_start;
bool m_showOnDestruct;
bool m_ended;
};
#else
class Profiler
{
public:
Profiler(const char *, bool = false) { }
~Profiler() { }
void update() const { }
void end() { }
};
#endif
} // end namespace sv
#endif
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