timer.h ソースファイル

説明を見る。
 // 
 // Copyright (c) 2003-2011, MIST Project, Nagoya University
 // All rights reserved.
 // 
 // Redistribution and use in source and binary forms, with or without modification,
 // are permitted provided that the following conditions are met:
 // 
 // 1. Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 // 
 // 2. Redistributions in binary form must reproduce the above copyright notice,
 // this list of conditions and the following disclaimer in the documentation
 // and/or other materials provided with the distribution.
 // 
 // 3. Neither the name of the Nagoya University nor the names of its contributors
 // may be used to endorse or promote products derived from this software
 // without specific prior written permission.
 // 
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 // FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 // IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 // 
 
 #ifndef __INCLUDE_MIST_TIMER__
 #define __INCLUDE_MIST_TIMER__
 
 
 #ifndef __INCLUDE_MIST_CONF_H__
 #include "config/mist_conf.h"
 #endif
 
 #if defined( __MIST_WINDOWS__ ) && __MIST_WINDOWS__ > 0
 
 #include <windows.h>
 #include <mmsystem.h>
 #pragma comment ( lib, "winmm.lib" )
 
 #else
 
 //#include <time.h>
 #include <sys/time.h>
 
 #endif
 
 
 // mist名前空間の始まり
 _MIST_BEGIN
 
 
 class timer
 {
 private:
 #if defined( __MIST_WINDOWS__ ) && __MIST_WINDOWS__ > 0
     union timeval
     {
         LARGE_INTEGER largeint;
         unsigned long long int uint64;
     };
 
     // Windows の場合で，高分解能カウンタが利用可能なら利用する
     static timeval __QueryPerformanceFrequency__( )
     {
         timeval dmy;
         QueryPerformanceFrequency( &( dmy.largeint ) );
         return( dmy );
     }
 
     static timeval _QueryPerformanceFrequency_( )
     {
         static timeval dmy = __QueryPerformanceFrequency__( );
         return( dmy );
     }
 
     static double _timeGetTime_( )
     {
         timeval dmy;
         if( QueryPerformanceCounter( &( dmy.largeint ) ) )
         {
             return( static_cast< double >( dmy.uint64 ) / static_cast< double >( _QueryPerformanceFrequency_( ).uint64 ) );
         }
         else
         {
             return( static_cast< double >( timeGetTime( ) ) / 1000.0 );
         }
     }
 #else
     static double _timeGetTime_( )
     {
         timeval dmy;
         gettimeofday( &dmy, NULL );
         return( static_cast< double >( dmy.tv_sec ) + static_cast< double >( dmy.tv_usec ) / 1000000.0 );
     }
 #endif
 
 public:
     timer( ) : _start_time( _timeGetTime_( ) )
     {
         _start_time = _timeGetTime_( );
     }
 
     void reset( )
     {
         _start_time = _timeGetTime_( );
     }
 
     double elapse( ) const
     {
         return( _timeGetTime_( ) - _start_time );
     }
 
 private:
     double  _start_time;    
 };
 
 
 class stopwatch
 {
 private:
     timer t_;
     double sec_;
     bool   run_;
 
 public:
     stopwatch( ) : sec_( 0.0 ), run_( false )
     {
     }
 
     void reset( )
     {
         t_.reset( );
         sec_ = 0.0;
     }
 
     double elapse( ) const
     {
         if( run_ )
         {
             return( sec_ + t_.elapse( ) );
         }
         else
         {
             return( sec_ );
         }
     }
 
     void stop( )
     {
         sec_ += t_.elapse( );
         run_ = false;
     }
 
     void start( )
     {
         t_.reset( );
         run_ = true;
     }
 };
 
 
 inline ::std::ostream &operator <<( ::std::ostream &out, const timer &t )
 {
     out << t.elapse( );
     return( out );
 }
 
 inline ::std::ostream &operator <<( ::std::ostream &out, const stopwatch &t )
 {
     out << t.elapse( );
     return( out );
 }
 
 
 // mist名前空間の終わり
 _MIST_END
 
 
 #endif // __INCLUDE_MIST_TIMER__
 