1/*
2 * The copyright in this software is being made available under the 2-clauses
3 * BSD License, included below. This software may be subject to other third
4 * party and contributor rights, including patent rights, and no such rights
5 * are granted under this license.
6 *
7 * Copyright (c) 2005, Herve Drolon, FreeImage Team
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifdef _WIN32
33#include <windows.h>
34#else
35#include <sys/time.h>
36#include <sys/resource.h>
37#include <sys/times.h>
38#endif /* _WIN32 */
39#include "opj_includes.h"
40
41OPJ_FLOAT64 opj_clock(void) {
42#ifdef _WIN32
43	/* _WIN32: use QueryPerformance (very accurate) */
44    LARGE_INTEGER freq , t ;
45    /* freq is the clock speed of the CPU */
46    QueryPerformanceFrequency(&freq) ;
47	/* cout << "freq = " << ((double) freq.QuadPart) << endl; */
48    /* t is the high resolution performance counter (see MSDN) */
49    QueryPerformanceCounter ( & t ) ;
50    return ( t.QuadPart /(OPJ_FLOAT64) freq.QuadPart ) ;
51#else
52	/* Unix or Linux: use resource usage */
53    struct rusage t;
54    OPJ_FLOAT64 procTime;
55    /* (1) Get the rusage data structure at this moment (man getrusage) */
56    getrusage(0,&t);
57    /* (2) What is the elapsed time ? - CPU time = User time + System time */
58	/* (2a) Get the seconds */
59    procTime = (OPJ_FLOAT64)(t.ru_utime.tv_sec + t.ru_stime.tv_sec);
60    /* (2b) More precisely! Get the microseconds part ! */
61    return ( procTime + (OPJ_FLOAT64)(t.ru_utime.tv_usec + t.ru_stime.tv_usec) * 1e-6 ) ;
62#endif
63}
64
65