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