time.h (1800B)
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 #ifndef AVUTIL_TIME_H 22 #define AVUTIL_TIME_H 23 24 #include <stdint.h> 25 26 /** 27 * Get the current time in microseconds. 28 */ 29 int64_t av_gettime(void); 30 31 /** 32 * Get the current time in microseconds since some unspecified starting point. 33 * On platforms that support it, the time comes from a monotonic clock 34 * This property makes this time source ideal for measuring relative time. 35 * The returned values may not be monotonic on platforms where a monotonic 36 * clock is not available. 37 */ 38 int64_t av_gettime_relative(void); 39 40 /** 41 * Indicates with a boolean result if the av_gettime_relative() time source 42 * is monotonic. 43 */ 44 int av_gettime_relative_is_monotonic(void); 45 46 /** 47 * Sleep for a period of time. Although the duration is expressed in 48 * microseconds, the actual delay may be rounded to the precision of the 49 * system timer. 50 * 51 * @param usec Number of microseconds to sleep. 52 * @return zero on success or (negative) error code. 53 */ 54 int av_usleep(unsigned usec); 55 56 #endif /* AVUTIL_TIME_H */