1 /*
2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11
12 #ifndef VPX_TIMER_H
13 #define VPX_TIMER_H
14
15 #if CONFIG_OS_SUPPORT
16
17 #if defined(_WIN32)
18 /*
19 * Win32 specific includes
20 */
21 #ifndef WIN32_LEAN_AND_MEAN
22 #define WIN32_LEAN_AND_MEAN
23 #endif
24 #include <windows.h>
25 #else
26 /*
27 * POSIX specific includes
28 */
29 #include <sys/time.h>
30
31 /* timersub is not provided by msys at this time. */
32 #ifndef timersub
33 #define timersub(a, b, result) \
34 do { \
35 (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
36 (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
37 if ((result)->tv_usec < 0) { \
38 --(result)->tv_sec; \
39 (result)->tv_usec += 1000000; \
40 } \
41 } while (0)
42 #endif
43 #endif
44
45
46 struct vpx_usec_timer
47 {
48 #if defined(_WIN32)
49 LARGE_INTEGER begin, end;
50 #else
51 struct timeval begin, end;
52 #endif
53 };
54
55
56 static void
vpx_usec_timer_start(struct vpx_usec_timer * t)57 vpx_usec_timer_start(struct vpx_usec_timer *t)
58 {
59 #if defined(_WIN32)
60 QueryPerformanceCounter(&t->begin);
61 #else
62 gettimeofday(&t->begin, NULL);
63 #endif
64 }
65
66
67 static void
vpx_usec_timer_mark(struct vpx_usec_timer * t)68 vpx_usec_timer_mark(struct vpx_usec_timer *t)
69 {
70 #if defined(_WIN32)
71 QueryPerformanceCounter(&t->end);
72 #else
73 gettimeofday(&t->end, NULL);
74 #endif
75 }
76
77
78 static long
vpx_usec_timer_elapsed(struct vpx_usec_timer * t)79 vpx_usec_timer_elapsed(struct vpx_usec_timer *t)
80 {
81 #if defined(_WIN32)
82 LARGE_INTEGER freq, diff;
83
84 diff.QuadPart = t->end.QuadPart - t->begin.QuadPart;
85
86 if (QueryPerformanceFrequency(&freq) && diff.QuadPart < freq.QuadPart)
87 return (long)(diff.QuadPart * 1000000 / freq.QuadPart);
88
89 return 1000000;
90 #else
91 struct timeval diff;
92
93 timersub(&t->end, &t->begin, &diff);
94 return diff.tv_sec ? 1000000 : diff.tv_usec;
95 #endif
96 }
97
98 #else /* CONFIG_OS_SUPPORT = 0*/
99
100 /* Empty timer functions if CONFIG_OS_SUPPORT = 0 */
101 #ifndef timersub
102 #define timersub(a, b, result)
103 #endif
104
105 struct vpx_usec_timer
106 {
107 void *dummy;
108 };
109
110 static void
vpx_usec_timer_start(struct vpx_usec_timer * t)111 vpx_usec_timer_start(struct vpx_usec_timer *t) { }
112
113 static void
vpx_usec_timer_mark(struct vpx_usec_timer * t)114 vpx_usec_timer_mark(struct vpx_usec_timer *t) { }
115
116 static long
vpx_usec_timer_elapsed(struct vpx_usec_timer * t)117 vpx_usec_timer_elapsed(struct vpx_usec_timer *t) { return 0; }
118
119 #endif /* CONFIG_OS_SUPPORT */
120
121 #endif
122