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/** TickTracker.hh file for the fluxbox compositor. */
// Copyright (c) 2011 Gediminas Liktaras (gliktaras at gmail dot com)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#ifndef FBCOMPOSITOR_TIMER_HH
#define FBCOMPOSITOR_TIMER_HH
#include "config.h"
#include "Exceptions.hh"
#include <sys/time.h>
namespace FbCompositor {
class TimeException;
class TickTracker;
/**
* A timer class.
*
* This class provides a simpler and more flexible interface to deal with
* time. It was added, since it is not possible to make continuous time
* measurements with FbTk::FbTickTracker.
*/
class TickTracker {
public:
//--- CONSTRUCTORS AND DESTRUCTORS -------------------------------------
/** Constructor. */
TickTracker();
/** Copy constructor. */
TickTracker(const TickTracker &other);
/** Assignment operator. */
TickTracker &operator=(const TickTracker &other);
/** Destructor. */
~TickTracker();
//--- TIMER MANIPULATION -----------------------------------------------
/** Starts the timer. */
void start();
/** Stops the timer. */
void stop();
//--- TIMER QUERIES ----------------------------------------------------
/** \returns whether the timer is running. */
bool isRunning() const;
/** \returns the tick size. */
int tickSize() const;
/** \returns the new number of elapsed ticks since last call of this function. */
int newElapsedTicks();
/** \returns the total number of elapsed ticks. */
int totalElapsedTicks();
/** Sets the size of a tick. */
void setTickSize(int usec);
private:
//--- INTERNAL FUNTIONS ------------------------------------------------
/** \returns the difference in time between two timevals. */
timeval timeDifference(timeval t1, timeval t2);
/** \returns the difference between two timevals in ticks. */
int tickDifference(const timeval &t1, const timeval &t2);
//--- PRIVATE VARIABLES ------------------------------------------------
/** Whether the timer is running or not. */
bool m_is_running;
/** Time the timer was started. */
timeval m_startTime;
/** Size of the timer ticks. */
int m_tick_size;
/** The number of ticks per second. */
double m_ticks_per_second;
/** The number of observed ticks with newElapsedTicks(). */
int m_observed_ticks;
};
//--- INLINE FUNCTIONS -----------------------------------------------------
// Returns whether the timer is running.
inline bool TickTracker::isRunning() const {
return m_is_running;
}
// Returns the tick size.
inline int TickTracker::tickSize() const {
return m_tick_size;
}
}
#endif // FBCOMPOSITOR_TIMER_HH
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