Jip J. Dekker
1d9faf38de
git-subtree-dir: software/gecode git-subtree-split: 313e87646da4fc2752a70e83df16d993121a8e40
100 lines
2.8 KiB
C++
100 lines
2.8 KiB
C++
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Mikael Lagerkvist <lagerkvist@gecode.org>
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*
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* Copyright:
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* Mikael Lagerkvist, 2009
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*
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* This file is part of Gecode, the generic constraint
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* development environment:
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* http://www.gecode.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#ifdef GECODE_USE_GETTIMEOFDAY
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#include <sys/time.h>
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#endif
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#ifdef GECODE_USE_CLOCK
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#include <ctime>
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#endif
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namespace Gecode { namespace Support {
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/** \brief %Timer
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*
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* This class represents a best-effort at measuring wall-clock time
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* in milliseconds.
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*
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* \ingroup FuncSupport
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*/
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class GECODE_SUPPORT_EXPORT Timer {
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private:
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#if defined(GECODE_USE_GETTIMEOFDAY)
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timeval t0; ///< Start time
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#elif defined(GECODE_USE_CLOCK)
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clock_t t0; ///< Start time
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#endif
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public:
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/// Start timer
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void start(void);
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/// Get time since start of timer
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double stop(void);
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};
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inline void
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Timer::start(void) {
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#if defined(GECODE_USE_GETTIMEOFDAY)
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if (gettimeofday(&t0, nullptr))
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throw OperatingSystemError("Timer::start[gettimeofday]");
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#elif defined(GECODE_USE_CLOCK)
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t0 = clock();
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#endif
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}
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inline double
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Timer::stop(void) {
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#if defined(GECODE_USE_GETTIMEOFDAY)
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timeval t1, t;
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if (gettimeofday(&t1, nullptr))
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throw OperatingSystemError("Timer::stop[gettimeofday]");
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// t = t1 - t2
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t.tv_sec = t1.tv_sec - t0.tv_sec;
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t.tv_usec = t1.tv_usec - t0.tv_usec;
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if (t.tv_usec < 0) {
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t.tv_sec--;
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t.tv_usec += 1000000;
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}
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return (static_cast<double>(t.tv_sec) * 1000.0) +
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(static_cast<double>(t.tv_usec)/1000.0);
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#elif defined(GECODE_USE_CLOCK)
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return (static_cast<double>(clock()-t0) / CLOCKS_PER_SEC) * 1000.0;
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#endif
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}
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}}
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// STATISTICS: support-any
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