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 if(!QueryPerformanceFrequency(&freq)) return 0.0;
37 return (double)freq.QuadPart;
38 }
39
40 static double f=-1.0;
41
gettime(void)42 double 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
gettime(void)59 double 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