1 /*
2 * Copyright (c) 2000-2003 Fabrice Bellard
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "config.h"
22
23 #include <stddef.h>
24 #include <stdint.h>
25 #include <time.h>
26 #if HAVE_GETTIMEOFDAY
27 #include <sys/time.h>
28 #endif
29 #if HAVE_UNISTD_H
30 #include <unistd.h>
31 #endif
32 #if HAVE_WINDOWS_H
33 #include <windows.h>
34 #endif
35
36 #include "time.h"
37 #include "error.h"
38
av_gettime(void)39 int64_t av_gettime(void)
40 {
41 #if HAVE_GETTIMEOFDAY
42 struct timeval tv;
43 gettimeofday(&tv, NULL);
44 return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;
45 #elif HAVE_GETSYSTEMTIMEASFILETIME
46 FILETIME ft;
47 int64_t t;
48 GetSystemTimeAsFileTime(&ft);
49 t = (int64_t)ft.dwHighDateTime << 32 | ft.dwLowDateTime;
50 return t / 10 - 11644473600000000; /* Jan 1, 1601 */
51 #else
52 return -1;
53 #endif
54 }
55
av_gettime_relative(void)56 int64_t av_gettime_relative(void)
57 {
58 #if HAVE_CLOCK_GETTIME && defined(CLOCK_MONOTONIC)
59 #ifdef __APPLE__
60 if (&clock_gettime)
61 #endif
62 {
63 struct timespec ts;
64 clock_gettime(CLOCK_MONOTONIC, &ts);
65 return (int64_t)ts.tv_sec * 1000000 + ts.tv_nsec / 1000;
66 }
67 #endif
68 return av_gettime() + 42 * 60 * 60 * INT64_C(1000000);
69 }
70
av_gettime_relative_is_monotonic(void)71 int av_gettime_relative_is_monotonic(void)
72 {
73 #if HAVE_CLOCK_GETTIME && defined(CLOCK_MONOTONIC)
74 #ifdef __APPLE__
75 if (!&clock_gettime)
76 return 0;
77 #endif
78 return 1;
79 #else
80 return 0;
81 #endif
82 }
83
av_usleep(unsigned usec)84 int av_usleep(unsigned usec)
85 {
86 #if HAVE_NANOSLEEP
87 struct timespec ts = { usec / 1000000, usec % 1000000 * 1000 };
88 while (nanosleep(&ts, &ts) < 0 && errno == EINTR);
89 return 0;
90 #elif HAVE_USLEEP
91 return usleep(usec);
92 #elif HAVE_SLEEP
93 Sleep(usec / 1000);
94 return 0;
95 #else
96 return AVERROR(ENOSYS);
97 #endif
98 }
99