timer.hpp
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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */ 00002 /* 00003 * Main authors: 00004 * Mikael Lagerkvist <lagerkvist@gecode.org> 00005 * 00006 * Copyright: 00007 * Mikael Lagerkvist, 2009 00008 * 00009 * Last modified: 00010 * $Date: 2010-07-14 17:46:18 +0200 (Wed, 14 Jul 2010) $ by $Author: schulte $ 00011 * $Revision: 11192 $ 00012 * 00013 * This file is part of Gecode, the generic constraint 00014 * development environment: 00015 * http://www.gecode.org 00016 * 00017 * Permission is hereby granted, free of charge, to any person obtaining 00018 * a copy of this software and associated documentation files (the 00019 * "Software"), to deal in the Software without restriction, including 00020 * without limitation the rights to use, copy, modify, merge, publish, 00021 * distribute, sublicense, and/or sell copies of the Software, and to 00022 * permit persons to whom the Software is furnished to do so, subject to 00023 * the following conditions: 00024 * 00025 * The above copyright notice and this permission notice shall be 00026 * included in all copies or substantial portions of the Software. 00027 * 00028 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00029 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00030 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 00031 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 00032 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 00033 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00034 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00035 * 00036 */ 00037 00038 #ifdef GECODE_USE_GETTIMEOFDAY 00039 #include <sys/time.h> 00040 #endif 00041 00042 #ifdef GECODE_USE_CLOCK 00043 #include <ctime> 00044 #endif 00045 00046 namespace Gecode { namespace Support { 00047 00055 class GECODE_SUPPORT_EXPORT Timer { 00056 private: 00057 #if defined(GECODE_USE_GETTIMEOFDAY) 00058 timeval t0; 00059 #elif defined(GECODE_USE_CLOCK) 00060 clock_t t0; 00061 #endif 00062 public: 00064 void start(void); 00066 double stop(void); 00067 }; 00068 00069 inline void 00070 Timer::start(void) { 00071 #if defined(GECODE_USE_GETTIMEOFDAY) 00072 if (gettimeofday(&t0, NULL)) 00073 throw OperatingSystemError("Timer::start[gettimeofday]"); 00074 #elif defined(GECODE_USE_CLOCK) 00075 t0 = clock(); 00076 #endif 00077 } 00078 00079 inline double 00080 Timer::stop(void) { 00081 #if defined(GECODE_USE_GETTIMEOFDAY) 00082 timeval t1, t; 00083 if (gettimeofday(&t1, NULL)) 00084 throw OperatingSystemError("Timer::stop[gettimeofday]"); 00085 00086 // t = t1 - t2 00087 t.tv_sec = t1.tv_sec - t0.tv_sec; 00088 t.tv_usec = t1.tv_usec - t0.tv_usec; 00089 if (t.tv_usec < 0) { 00090 t.tv_sec--; 00091 t.tv_usec += 1000000; 00092 } 00093 00094 return (static_cast<double>(t.tv_sec) * 1000.0) + 00095 (static_cast<double>(t.tv_usec)/1000.0); 00096 #elif defined(GECODE_USE_CLOCK) 00097 return (static_cast<double>(clock()-t0) / CLOCKS_PER_SEC) * 1000.0; 00098 #endif 00099 } 00100 00101 }} 00102 00103 // STATISTICS: support-any