media/libvpx/vpx_ports/vpx_timer.h@ac0c01689b40
media/libvpx/vpx_ports/vpx_timer.h
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
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 */
12 #ifndef VPX_TIMER_H
13 #define VPX_TIMER_H
14 #include "vpx/vpx_integer.h"
16 #if CONFIG_OS_SUPPORT
18 #if defined(_WIN32)
19 /*
20 * Win32 specific includes
21 */
22 #ifndef WIN32_LEAN_AND_MEAN
23 #define WIN32_LEAN_AND_MEAN
24 #endif
25 #include <windows.h>
26 #else
27 /*
28 * POSIX specific includes
29 */
30 #include <sys/time.h>
32 /* timersub is not provided by msys at this time. */
33 #ifndef timersub
34 #define timersub(a, b, result) \
35 do { \
36 (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
37 (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
38 if ((result)->tv_usec < 0) { \
39 --(result)->tv_sec; \
40 (result)->tv_usec += 1000000; \
41 } \
42 } while (0)
43 #endif
44 #endif
47 struct vpx_usec_timer {
48 #if defined(_WIN32)
49 LARGE_INTEGER begin, end;
50 #else
51 struct timeval begin, end;
52 #endif
53 };
56 static void
57 vpx_usec_timer_start(struct vpx_usec_timer *t) {
58 #if defined(_WIN32)
59 QueryPerformanceCounter(&t->begin);
60 #else
61 gettimeofday(&t->begin, NULL);
62 #endif
63 }
66 static void
67 vpx_usec_timer_mark(struct vpx_usec_timer *t) {
68 #if defined(_WIN32)
69 QueryPerformanceCounter(&t->end);
70 #else
71 gettimeofday(&t->end, NULL);
72 #endif
73 }
76 static int64_t
77 vpx_usec_timer_elapsed(struct vpx_usec_timer *t) {
78 #if defined(_WIN32)
79 LARGE_INTEGER freq, diff;
81 diff.QuadPart = t->end.QuadPart - t->begin.QuadPart;
83 QueryPerformanceFrequency(&freq);
84 return diff.QuadPart * 1000000 / freq.QuadPart;
85 #else
86 struct timeval diff;
88 timersub(&t->end, &t->begin, &diff);
89 return diff.tv_sec * 1000000 + diff.tv_usec;
90 #endif
91 }
93 #else /* CONFIG_OS_SUPPORT = 0*/
95 /* Empty timer functions if CONFIG_OS_SUPPORT = 0 */
96 #ifndef timersub
97 #define timersub(a, b, result)
98 #endif
100 struct vpx_usec_timer {
101 void *dummy;
102 };
104 static void
105 vpx_usec_timer_start(struct vpx_usec_timer *t) { }
107 static void
108 vpx_usec_timer_mark(struct vpx_usec_timer *t) { }
110 static long
111 vpx_usec_timer_elapsed(struct vpx_usec_timer *t) {
112 return 0;
113 }
115 #endif /* CONFIG_OS_SUPPORT */
117 #endif
