timer.hpp
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/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Main authors:
* Mikael Lagerkvist <lagerkvist@gecode.org>
*
* Copyright:
* Mikael Lagerkvist, 2009
*
* This file is part of Gecode, the generic constraint
* development environment:
* http://www.gecode.org
*
* 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
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*
*/
#ifdef GECODE_USE_GETTIMEOFDAY
#include <sys/time.h>
#endif
#ifdef GECODE_USE_CLOCK
#include <ctime>
#endif
namespace Gecode { namespace Support {
class GECODE_SUPPORT_EXPORT Timer {
private:
#if defined(GECODE_USE_GETTIMEOFDAY)
timeval t0;
#elif defined(GECODE_USE_CLOCK)
clock_t t0;
#endif
public:
void start(void);
double stop(void);
};
inline void
Timer::start(void) {
#if defined(GECODE_USE_GETTIMEOFDAY)
if (gettimeofday(&t0, NULL))
throw OperatingSystemError("Timer::start[gettimeofday]");
#elif defined(GECODE_USE_CLOCK)
t0 = clock();
#endif
}
inline double
Timer::stop(void) {
#if defined(GECODE_USE_GETTIMEOFDAY)
timeval t1, t;
if (gettimeofday(&t1, NULL))
throw OperatingSystemError("Timer::stop[gettimeofday]");
// t = t1 - t2
t.tv_sec = t1.tv_sec - t0.tv_sec;
t.tv_usec = t1.tv_usec - t0.tv_usec;
if (t.tv_usec < 0) {
t.tv_sec--;
t.tv_usec += 1000000;
}
return (static_cast<double>(t.tv_sec) * 1000.0) +
(static_cast<double>(t.tv_usec)/1000.0);
#elif defined(GECODE_USE_CLOCK)
return (static_cast<double>(clock()-t0) / CLOCKS_PER_SEC) * 1000.0;
#endif
}
}}
// STATISTICS: support-any
Gecode::OperatingSystemError
Exception: operating system error
Definition exception.hpp:75
Gecode::Support::Timer
Timer
Definition timer.hpp:51
Gecode::Support::Timer::stop
double stop(void)
Get time since start of timer.
Definition timer.hpp:76
Gecode::Support::Timer::start
void start(void)
Start timer.
Definition timer.hpp:66
Gecode::Support
Support algorithms and datastructures
Gecode
Gecode toplevel namespace
GECODE_SUPPORT_EXPORT
#define GECODE_SUPPORT_EXPORT
Definition support.hh:71