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Open Source Computer Vision Library
https://opencv.org/
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67 lines
2.7 KiB
67 lines
2.7 KiB
/* |
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* The copyright in this software is being made available under the 2-clauses |
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* BSD License, included below. This software may be subject to other third |
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* party and contributor rights, including patent rights, and no such rights |
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* are granted under this license. |
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* |
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* Copyright (c) 2005, Herve Drolon, FreeImage Team |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' |
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include "opj_includes.h" |
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#ifdef _WIN32 |
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#include <windows.h> |
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#else |
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#include <sys/time.h> |
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#include <sys/resource.h> |
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#include <sys/times.h> |
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#endif /* _WIN32 */ |
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OPJ_FLOAT64 opj_clock(void) |
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{ |
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#ifdef _WIN32 |
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/* _WIN32: use QueryPerformance (very accurate) */ |
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LARGE_INTEGER freq, t ; |
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/* freq is the clock speed of the CPU */ |
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QueryPerformanceFrequency(&freq) ; |
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/* cout << "freq = " << ((double) freq.QuadPart) << endl; */ |
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/* t is the high resolution performance counter (see MSDN) */ |
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QueryPerformanceCounter(& t) ; |
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return ((OPJ_FLOAT64) t.QuadPart / (OPJ_FLOAT64) freq.QuadPart) ; |
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#else |
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/* Unix or Linux: use resource usage */ |
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struct rusage t; |
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OPJ_FLOAT64 procTime; |
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/* (1) Get the rusage data structure at this moment (man getrusage) */ |
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getrusage(0, &t); |
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/* (2) What is the elapsed time ? - CPU time = User time + System time */ |
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/* (2a) Get the seconds */ |
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procTime = (OPJ_FLOAT64)(t.ru_utime.tv_sec + t.ru_stime.tv_sec); |
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/* (2b) More precisely! Get the microseconds part ! */ |
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return (procTime + (OPJ_FLOAT64)(t.ru_utime.tv_usec + t.ru_stime.tv_usec) * |
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1e-6) ; |
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#endif |
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} |
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