PBRT
/home/felix/UBC/projects/AdaptiveLightfieldSampling/pbrt_v2/src/core/timer.h
00001 
00002 /*
00003     pbrt source code Copyright(c) 1998-2012 Matt Pharr and Greg Humphreys.
00004 
00005     This file is part of pbrt.
00006 
00007     Redistribution and use in source and binary forms, with or without
00008     modification, are permitted provided that the following conditions are
00009     met:
00010 
00011     - Redistributions of source code must retain the above copyright
00012       notice, this list of conditions and the following disclaimer.
00013 
00014     - Redistributions in binary form must reproduce the above copyright
00015       notice, this list of conditions and the following disclaimer in the
00016       documentation and/or other materials provided with the distribution.
00017 
00018     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
00019     IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
00020     TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
00021     PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
00022     HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00023     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
00024     LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00025     DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00026     THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00027     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00028     OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00029 
00030  */
00031 
00032 #if defined(_MSC_VER)
00033 #pragma once
00034 #endif
00035 
00036 #ifndef PBRT_CORE_TIMER_H
00037 #define PBRT_CORE_TIMER_H
00038 
00039 // core/timer.h*
00040 #include "pbrt.h"
00041 #if defined (PBRT_IS_WINDOWS)
00042 #include <windows.h>
00043 #if (_MSC_VER >= 1400)
00044 #include <stdio.h>
00045 #define snprintf _snprintf
00046 #endif
00047 #else
00048 #include <sys/time.h>
00049 #endif
00050 
00051 // Timer Declarations
00052 class Timer {
00053 public:
00054     // Public Timer Methods
00055     Timer();
00056     
00057     void Start();
00058     void Stop();
00059     void Reset();
00060     
00061     double Time();
00062 private:
00063     // Private Timer Data
00064     double time0, elapsed;
00065     bool running;
00066     double GetTime();
00067 #if defined(PBRT_IS_WINDOWS)
00068     // Private Windows Timer Data
00069     LARGE_INTEGER performance_counter, performance_frequency;
00070     double one_over_frequency;
00071 #else
00072     // Private UNIX Timer Data
00073     struct timeval timeofday;
00074 #endif
00075 };
00076 
00077 
00078 
00079 #endif // PBRT_CORE_TIMER_H