PulseAudio 16.1

timeval.h
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1#ifndef footimevalhfoo
2#define footimevalhfoo
3
4/***
5 This file is part of PulseAudio.
6
7 Copyright 2004-2006 Lennart Poettering
8 Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
9
10 PulseAudio is free software; you can redistribute it and/or modify
11 it under the terms of the GNU Lesser General Public License as
12 published by the Free Software Foundation; either version 2.1 of the
13 License, or (at your option) any later version.
14
15 PulseAudio is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
19
20 You should have received a copy of the GNU Lesser General Public
21 License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
22***/
23
24#include <pulse/cdecl.h>
25#include <pulse/gccmacro.h>
26#include <pulse/sample.h>
27#include <pulse/version.h>
28
32PA_C_DECL_BEGIN
33
35#define PA_MSEC_PER_SEC ((pa_usec_t) 1000ULL)
36
38#define PA_USEC_PER_SEC ((pa_usec_t) 1000000ULL)
39
41#define PA_NSEC_PER_SEC ((unsigned long long) 1000000000ULL)
42
44#define PA_USEC_PER_MSEC ((pa_usec_t) 1000ULL)
45
47#define PA_NSEC_PER_MSEC ((unsigned long long) 1000000ULL)
48
50#define PA_NSEC_PER_USEC ((unsigned long long) 1000ULL)
51
53#define PA_USEC_INVALID ((pa_usec_t) -1)
54
56#define PA_USEC_MAX ((pa_usec_t) -2)
57
58 struct timeval;
59
61 struct timeval *pa_gettimeofday(struct timeval *tv);
62
65 pa_usec_t pa_timeval_diff(const struct timeval *a, const struct timeval *b) PA_GCC_PURE;
66
68 int pa_timeval_cmp(const struct timeval *a, const struct timeval *b) PA_GCC_PURE;
69
71 pa_usec_t pa_timeval_age(const struct timeval *tv);
72
74 struct timeval* pa_timeval_add(struct timeval *tv, pa_usec_t v);
75
77 struct timeval* pa_timeval_sub(struct timeval *tv, pa_usec_t v);
78
80 struct timeval* pa_timeval_store(struct timeval *tv, pa_usec_t v);
81
83 pa_usec_t pa_timeval_load(const struct timeval *tv);
84
85PA_C_DECL_END
86
87#endif
gccmacro.h
GCC attribute macros.
PA_GCC_PURE
#define PA_GCC_PURE
This function's return value depends only the arguments list and global state.
Definition: gccmacro.h:71
sample.h
Constants and routines for sample type handling.
pa_usec_t
uint64_t pa_usec_t
Type for usec specifications (unsigned).
Definition: sample.h:264
pa_timeval_store
struct timeval * pa_timeval_store(struct timeval *tv, pa_usec_t v)
Store the specified usec value in the timeval struct.
pa_timeval_add
struct timeval * pa_timeval_add(struct timeval *tv, pa_usec_t v)
Add the specified time in microseconds to the specified timeval structure.
pa_timeval_diff
pa_usec_t pa_timeval_diff(const struct timeval *a, const struct timeval *b) PA_GCC_PURE
Calculate the difference between the two specified timeval structs.
pa_timeval_sub
struct timeval * pa_timeval_sub(struct timeval *tv, pa_usec_t v)
Subtract the specified time in microseconds to the specified timeval structure.
pa_timeval_load
pa_usec_t pa_timeval_load(const struct timeval *tv)
Load the specified tv value and return it in usec.
pa_timeval_age
pa_usec_t pa_timeval_age(const struct timeval *tv)
Return the time difference between now and the specified timestamp.
pa_timeval_cmp
int pa_timeval_cmp(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.
pa_gettimeofday
struct timeval * pa_gettimeofday(struct timeval *tv)
Return the current wallclock timestamp, just like UNIX gettimeofday().