| /* |
| * The copyright in this software is being made available under the 2-clauses |
| * BSD License, included below. This software may be subject to other third |
| * party and contributor rights, including patent rights, and no such rights |
| * are granted under this license. |
| * |
| * Copyright (c) 2005, Herve 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. |
| */ |
| |
| #include "opj_includes.h" |
| |
| #ifdef _WIN32 |
| #include <windows.h> |
| #else |
| #include <sys/time.h> |
| #include <sys/resource.h> |
| #include <sys/times.h> |
| #endif /* _WIN32 */ |
| |
| OPJ_FLOAT64 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 ((OPJ_FLOAT64) t.QuadPart / (OPJ_FLOAT64) freq.QuadPart) ; |
| #else |
| /* Unix or Linux: use resource usage */ |
| struct rusage t; |
| OPJ_FLOAT64 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 = (OPJ_FLOAT64)(t.ru_utime.tv_sec + t.ru_stime.tv_sec); |
| /* (2b) More precisely! Get the microseconds part ! */ |
| return (procTime + (OPJ_FLOAT64)(t.ru_utime.tv_usec + t.ru_stime.tv_usec) * |
| 1e-6) ; |
| #endif |
| } |
| |