| 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 | |
| 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 | |
| 56 | int64_t av_gettime_relative(void) |
| 57 | { |
| 58 | #if HAVE_CLOCK_GETTIME && defined(CLOCK_MONOTONIC) |
| 59 | struct timespec ts; |
| 60 | clock_gettime(CLOCK_MONOTONIC, &ts); |
| 61 | return (int64_t)ts.tv_sec * 1000000 + ts.tv_nsec / 1000; |
| 62 | #else |
| 63 | return av_gettime() + 42 * 60 * 60 * INT64_C(1000000); |
| 64 | #endif |
| 65 | } |
| 66 | |
| 67 | int av_gettime_relative_is_monotonic(void) |
| 68 | { |
| 69 | #if HAVE_CLOCK_GETTIME && defined(CLOCK_MONOTONIC) |
| 70 | return 1; |
| 71 | #else |
| 72 | return 0; |
| 73 | #endif |
| 74 | } |
| 75 | |
| 76 | int av_usleep(unsigned usec) |
| 77 | { |
| 78 | #if HAVE_NANOSLEEP |
| 79 | struct timespec ts = { usec / 1000000, usec % 1000000 * 1000 }; |
| 80 | while (nanosleep(&ts, &ts) < 0 && errno == EINTR); |
| 81 | return 0; |
| 82 | #elif HAVE_USLEEP |
| 83 | return usleep(usec); |
| 84 | #elif HAVE_SLEEP |
| 85 | Sleep(usec / 1000); |
| 86 | return 0; |
| 87 | #else |
| 88 | return AVERROR(ENOSYS); |
| 89 | #endif |
| 90 | } |