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
getFreq(void)33 static double getFreq(void)
34 {
35 LARGE_INTEGER freq;
36
37 if (!QueryPerformanceFrequency(&freq)) return 0.0;
38 return (double)freq.QuadPart;
39 }
40
41 static double f = -1.0;
42
getTime(void)43 double getTime(void)
44 {
45 LARGE_INTEGER t;
46
47 if (f < 0.0) f = getFreq();
48 if (f == 0.0) return (double)GetTickCount() / 1000.;
49 else {
50 QueryPerformanceCounter(&t);
51 return (double)t.QuadPart / f;
52 }
53 }
54
55 #else
56
57 #include <stdlib.h>
58 #include <sys/time.h>
59
getTime(void)60 double getTime(void)
61 {
62 struct timeval tv;
63
64 if (gettimeofday(&tv, NULL) < 0) return 0.0;
65 else return (double)tv.tv_sec + ((double)tv.tv_usec / 1000000.);
66 }
67
68 #endif
69