96 строки
2.0 KiB
C++
96 строки
2.0 KiB
C++
//========================================================================
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//
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// GooTimer.cc
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//
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// This file is licensed under GPLv2 or later
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//
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// Copyright 2005 Jonathan Blandford <jrb@redhat.com>
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// Copyright 2007 Krzysztof Kowalczyk <kkowalczyk@gmail.com>
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// Copyright 2010 Hib Eris <hib@hiberis.nl>
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// Inspired by gtimer.c in glib, which is Copyright 2000 by the GLib Team
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//
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//========================================================================
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#include <config.h>
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#ifdef USE_GCC_PRAGMAS
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#pragma implementation
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#endif
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#include "GooTimer.h"
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#include <string.h>
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#define USEC_PER_SEC 1000000
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//------------------------------------------------------------------------
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// GooTimer
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//------------------------------------------------------------------------
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GooTimer::GooTimer() {
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start();
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}
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void GooTimer::start() {
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#ifdef HAVE_GETTIMEOFDAY
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gettimeofday(&start_time, NULL);
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#elif defined(_WIN32)
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QueryPerformanceCounter(&start_time);
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#endif
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active = true;
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}
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void GooTimer::stop() {
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#ifdef HAVE_GETTIMEOFDAY
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gettimeofday(&end_time, NULL);
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#elif defined(_WIN32)
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QueryPerformanceCounter(&end_time);
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#endif
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active = false;
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}
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#ifdef HAVE_GETTIMEOFDAY
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double GooTimer::getElapsed()
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{
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double total;
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struct timeval elapsed;
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if (active)
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gettimeofday(&end_time, NULL);
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if (start_time.tv_usec > end_time.tv_usec) {
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end_time.tv_usec += USEC_PER_SEC;
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end_time.tv_sec--;
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}
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elapsed.tv_usec = end_time.tv_usec - start_time.tv_usec;
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elapsed.tv_sec = end_time.tv_sec - start_time.tv_sec;
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total = elapsed.tv_sec + ((double) elapsed.tv_usec / 1e6);
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if (total < 0)
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total = 0;
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return total;
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}
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#elif defined(_WIN32)
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double GooTimer::getElapsed()
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{
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LARGE_INTEGER freq;
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double time_in_secs;
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QueryPerformanceFrequency(&freq);
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if (active)
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QueryPerformanceCounter(&end_time);
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time_in_secs = (double)(end_time.QuadPart-start_time.QuadPart)/(double)freq.QuadPart;
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return time_in_secs * 1000.0;
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}
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#else
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double GooTimer::getElapsed()
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{
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#warning "no support for GooTimer"
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return 0;
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}
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#endif
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