1/*
2 * Copyright (C)2011 D. R. Commander.  All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * - Redistributions of source code must retain the above copyright notice,
8 *   this list of conditions and the following disclaimer.
9 * - Redistributions in binary form must reproduce the above copyright notice,
10 *   this list of conditions and the following disclaimer in the documentation
11 *   and/or other materials provided with the distribution.
12 * - Neither the name of the libjpeg-turbo Project nor the names of its
13 *   contributors may be used to endorse or promote products derived from this
14 *   software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifdef _WIN32
30
31#include <windows.h>
32
33static double getfreq(void)
34{
35	LARGE_INTEGER freq;
36	if(!QueryPerformanceFrequency(&freq)) return 0.0;
37	return (double)freq.QuadPart;
38}
39
40static double f=-1.0;
41
42double gettime(void)
43{
44	LARGE_INTEGER t;
45	if(f<0.0) f=getfreq();
46	if(f==0.0) return (double)GetTickCount()/1000.;
47	else
48	{
49		QueryPerformanceCounter(&t);
50		return (double)t.QuadPart/f;
51	}
52}
53
54#else
55
56#include <stdlib.h>
57#include <sys/time.h>
58
59double gettime(void)
60{
61	struct timeval tv;
62	if(gettimeofday(&tv, NULL)<0) return 0.0;
63	else return (double)tv.tv_sec+((double)tv.tv_usec/1000000.);
64}
65
66#endif
67