#ifndef footimevalhfoo #define footimevalhfoo /*** This file is part of PulseAudio. Copyright 2004-2006 Lennart Poettering Copyright 2006 Pierre Ossman <[email protected]> for Cendio AB PulseAudio is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. PulseAudio is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>. ***/ #include <pulse/cdecl.h> #include <pulse/gccmacro.h> #include <pulse/sample.h> #include <pulse/version.h> /** \file * Utility functions for handling timeval calculations */ PA_C_DECL_BEGIN /** The number of milliseconds in a second */ #define PA_MSEC_PER_SEC … /** The number of microseconds in a second */ #define PA_USEC_PER_SEC … /** The number of nanoseconds in a second */ #define PA_NSEC_PER_SEC … /** The number of microseconds in a millisecond */ #define PA_USEC_PER_MSEC … /** The number of nanoseconds in a millisecond */ #define PA_NSEC_PER_MSEC … /** The number of nanoseconds in a microsecond */ #define PA_NSEC_PER_USEC … /** Invalid time in usec. \since 0.9.15 */ #define PA_USEC_INVALID … /** Biggest time in usec. \since 0.9.18 */ #define PA_USEC_MAX … struct timeval; /** Return the current wallclock timestamp, just like UNIX gettimeofday(). */ struct timeval *pa_gettimeofday(struct timeval *tv); /** Calculate the difference between the two specified timeval * structs. */ pa_usec_t pa_timeval_diff(const struct timeval *a, const struct timeval *b) PA_GCC_PURE; /** Compare the two timeval structs and return 0 when equal, negative when a < b, positive otherwise */ int pa_timeval_cmp(const struct timeval *a, const struct timeval *b) PA_GCC_PURE; /** Return the time difference between now and the specified timestamp */ pa_usec_t pa_timeval_age(const struct timeval *tv); /** Add the specified time in microseconds to the specified timeval structure */ struct timeval* pa_timeval_add(struct timeval *tv, pa_usec_t v); /** Subtract the specified time in microseconds to the specified timeval structure. \since 0.9.11 */ struct timeval* pa_timeval_sub(struct timeval *tv, pa_usec_t v); /** Store the specified usec value in the timeval struct. \since 0.9.7 */ struct timeval* pa_timeval_store(struct timeval *tv, pa_usec_t v); /** Load the specified tv value and return it in usec. \since 0.9.7 */ pa_usec_t pa_timeval_load(const struct timeval *tv); PA_C_DECL_END #endif
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