time.c (2367B)
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 "fftime.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 #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 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 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 }