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2.9 kB · 99 lines
C++
at develop
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100/* -*- 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 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * */
#ifdef GECODE_USE_GETTIMEOFDAY#include <sys/time.h>#endif
#ifdef GECODE_USE_CLOCK#include <ctime>#endif
namespace Gecode { namespace Support {
/** \brief %Timer * * This class represents a best-effort at measuring wall-clock time * in milliseconds. * * \ingroup FuncSupport */ class GECODE_SUPPORT_EXPORT Timer { private:#if defined(GECODE_USE_GETTIMEOFDAY) timeval t0; ///< Start time#elif defined(GECODE_USE_CLOCK) clock_t t0; ///< Start time#endif public: /// Start timer void start(void); /// Get time since start of timer double stop(void); };
inline void Timer::start(void) {#if defined(GECODE_USE_GETTIMEOFDAY) if (gettimeofday(&t0, nullptr)) 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, nullptr)) 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