68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
/*
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* Copyright 2012 NVIDIA Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef TIMER_H
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#define TIMER_H
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#include <stdlib.h>
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#ifdef WIN32
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#else
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#include <sys/time.h>
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#endif
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#ifdef WIN32
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double PCFreq = 0.0;
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__int64 timerStart = 0;
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#else
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struct timeval timerStart;
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#endif
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void StartTimer()
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{
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#ifdef WIN32
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LARGE_INTEGER li;
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if(!QueryPerformanceFrequency(&li))
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printf("QueryPerformanceFrequency failed!\n");
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PCFreq = (double)li.QuadPart/1000.0;
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QueryPerformanceCounter(&li);
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timerStart = li.QuadPart;
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#else
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gettimeofday(&timerStart, NULL);
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#endif
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}
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// time elapsed in ms
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double GetTimer()
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{
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#ifdef WIN32
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LARGE_INTEGER li;
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QueryPerformanceCounter(&li);
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return (double)(li.QuadPart-timerStart)/PCFreq;
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#else
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struct timeval timerStop, timerElapsed;
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gettimeofday(&timerStop, NULL);
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timersub(&timerStop, &timerStart, &timerElapsed);
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return timerElapsed.tv_sec*1000.0+timerElapsed.tv_usec/1000.0;
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#endif
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}
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#endif // TIMER_H
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