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_PORTS_VPX_TIMER_H_
13#define VPX_PORTS_VPX_TIMER_H_
14
15#include "./vpx_config.h"
16
17#include "vpx/vpx_integer.h"
18
19#if CONFIG_OS_SUPPORT
20
21#if defined(_WIN32)
22/*
23 * Win32 specific includes
24 */
25#ifndef WIN32_LEAN_AND_MEAN
26#define WIN32_LEAN_AND_MEAN
27#endif
28#include <windows.h>
29#else
30/*
31 * POSIX specific includes
32 */
33#include <sys/time.h>
34
35/* timersub is not provided by msys at this time. */
36#ifndef timersub
37#define timersub(a, b, result) \
38  do { \
39    (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
40    (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
41    if ((result)->tv_usec < 0) { \
42      --(result)->tv_sec; \
43      (result)->tv_usec += 1000000; \
44    } \
45  } while (0)
46#endif
47#endif
48
49
50struct vpx_usec_timer {
51#if defined(_WIN32)
52  LARGE_INTEGER  begin, end;
53#else
54  struct timeval begin, end;
55#endif
56};
57
58
59static INLINE void
60vpx_usec_timer_start(struct vpx_usec_timer *t) {
61#if defined(_WIN32)
62  QueryPerformanceCounter(&t->begin);
63#else
64  gettimeofday(&t->begin, NULL);
65#endif
66}
67
68
69static INLINE void
70vpx_usec_timer_mark(struct vpx_usec_timer *t) {
71#if defined(_WIN32)
72  QueryPerformanceCounter(&t->end);
73#else
74  gettimeofday(&t->end, NULL);
75#endif
76}
77
78
79static INLINE int64_t
80vpx_usec_timer_elapsed(struct vpx_usec_timer *t) {
81#if defined(_WIN32)
82  LARGE_INTEGER freq, diff;
83
84  diff.QuadPart = t->end.QuadPart - t->begin.QuadPart;
85
86  QueryPerformanceFrequency(&freq);
87  return diff.QuadPart * 1000000 / freq.QuadPart;
88#else
89  struct timeval diff;
90
91  timersub(&t->end, &t->begin, &diff);
92  return diff.tv_sec * 1000000 + diff.tv_usec;
93#endif
94}
95
96#else /* CONFIG_OS_SUPPORT = 0*/
97
98/* Empty timer functions if CONFIG_OS_SUPPORT = 0 */
99#ifndef timersub
100#define timersub(a, b, result)
101#endif
102
103struct vpx_usec_timer {
104  void *dummy;
105};
106
107static INLINE void
108vpx_usec_timer_start(struct vpx_usec_timer *t) { }
109
110static INLINE void
111vpx_usec_timer_mark(struct vpx_usec_timer *t) { }
112
113static INLINE int
114vpx_usec_timer_elapsed(struct vpx_usec_timer *t) {
115  return 0;
116}
117
118#endif /* CONFIG_OS_SUPPORT */
119
120#endif  // VPX_PORTS_VPX_TIMER_H_
121