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//
// Copyright 2013 Pixar
//
// Licensed under the Apache License, Version 2.0 (the "Apache License")
// with the following modification; you may not use this file except in
// compliance with the Apache License and the following modification to it:
// Section 6. Trademarks. is deleted and replaced with:
//
// 6. Trademarks. This License does not grant permission to use the trade
// names, trademarks, service marks, or product names of the Licensor
// and its affiliates, except as required to comply with Section 4(c) of
// the License and to reproduce the content of the NOTICE file.
//
// You may obtain a copy of the Apache License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the Apache License with the above modification is
// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the Apache License for the specific
// language governing permissions and limitations under the Apache License.
//
#ifndef STOPWATCH_H
#define STOPWATCH_H
#if (_WIN32)
#include <windows.h>
#else
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#endif
class Stopwatch {
public:
#ifndef _WIN32
Stopwatch() : _totalElapsed(0) { }
void Start() {
struct timeval l_rtime;
gettimeofday(&l_rtime,0);
_elapsed = (double)l_rtime.tv_sec + (double)l_rtime.tv_usec/1000000.0;
}
void Stop() {
struct timeval l_rtime;
gettimeofday(&l_rtime,0);
_elapsed = ((double)l_rtime.tv_sec + (double)l_rtime.tv_usec/1000000.0)
- _elapsed;
_totalElapsed += _elapsed;
}
double GetElapsed() const {
return _elapsed;
}
double GetTotalElapsed() const {
return _totalElapsed;
}
#else
Stopwatch() : _totalElapsed(0) {
QueryPerformanceFrequency(&_frequency);
}
void Start()
{
QueryPerformanceCounter(&_time);
}
void Stop()
{
LARGE_INTEGER currentTime;
QueryPerformanceCounter(¤tTime);
_elapsed = currentTime.QuadPart - _time.QuadPart;
_totalElapsed+=_elapsed;
}
double GetElapsed() const {
return (double) _elapsed / _frequency.QuadPart;
}
double GetTotalElapsed() const {
return (double) _totalElapsed / _frequency.QuadPart;
}
#endif
private:
#ifndef _WIN32
double _elapsed;
double _totalElapsed;
#else
LARGE_INTEGER _time;
LARGE_INTEGER _frequency;
__int64 _elapsed;
__int64 _totalElapsed;
#endif
};
#endif /* STOPWATCH_H */
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