2 This file is part of PulseAudio.
4 Copyright 2004-2006 Lennart Poettering
5 Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
7 PulseAudio is free software; you can redistribute it and/or modify
8 it under the terms of the GNU Lesser General Public License as
9 published by the Free Software Foundation; either version 2.1 of the
10 License, or (at your option) any later version.
12 PulseAudio is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public
18 License along with PulseAudio; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
34 #include <pulsecore/macro.h>
35 #include <pulsecore/core-util.h>
39 struct timeval *pa_gettimeofday(struct timeval *tv) {
40 #ifdef HAVE_GETTIMEOFDAY
43 pa_assert_se(gettimeofday(tv, NULL) == 0);
45 #elif defined(OS_IS_WIN32)
47 * Copied from implementation by Steven Edwards (LGPL).
48 * Found on wine mailing list.
51 #if defined(_MSC_VER) || defined(__BORLANDC__)
52 #define EPOCHFILETIME (116444736000000000i64)
54 #define EPOCHFILETIME (116444736000000000LL)
63 GetSystemTimeAsFileTime(&ft);
64 li.LowPart = ft.dwLowDateTime;
65 li.HighPart = ft.dwHighDateTime;
66 t = li.QuadPart; /* In 100-nanosecond intervals */
67 t -= EPOCHFILETIME; /* Offset to the Epoch time */
68 t /= 10; /* In microseconds */
69 tv->tv_sec = (time_t) (t / PA_USEC_PER_SEC);
70 tv->tv_usec = (suseconds_t) (t % PA_USEC_PER_SEC);
74 #error "Platform lacks gettimeofday() or equivalent function."
78 pa_usec_t pa_timeval_diff(const struct timeval *a, const struct timeval *b) {
84 /* Check which whan is the earlier time and swap the two arguments if required. */
85 if (PA_UNLIKELY(pa_timeval_cmp(a, b) < 0)) {
86 const struct timeval *c;
92 /* Calculate the second difference*/
93 r = ((pa_usec_t) a->tv_sec - (pa_usec_t) b->tv_sec) * PA_USEC_PER_SEC;
95 /* Calculate the microsecond difference */
96 if (a->tv_usec > b->tv_usec)
97 r += (pa_usec_t) a->tv_usec - (pa_usec_t) b->tv_usec;
98 else if (a->tv_usec < b->tv_usec)
99 r -= (pa_usec_t) b->tv_usec - (pa_usec_t) a->tv_usec;
104 int pa_timeval_cmp(const struct timeval *a, const struct timeval *b) {
108 if (a->tv_sec < b->tv_sec)
111 if (a->tv_sec > b->tv_sec)
114 if (a->tv_usec < b->tv_usec)
117 if (a->tv_usec > b->tv_usec)
123 pa_usec_t pa_timeval_age(const struct timeval *tv) {
127 return pa_timeval_diff(pa_gettimeofday(&now), tv);
130 struct timeval* pa_timeval_add(struct timeval *tv, pa_usec_t v) {
134 secs = (time_t) (v/PA_USEC_PER_SEC);
136 if (PA_UNLIKELY(tv->tv_sec > PA_INT_TYPE_MAX(time_t) - secs))
140 v -= (pa_usec_t) secs * PA_USEC_PER_SEC;
141 tv->tv_usec += (suseconds_t) v;
144 while ((pa_usec_t) tv->tv_usec >= PA_USEC_PER_SEC) {
146 if (PA_UNLIKELY(tv->tv_sec >= PA_INT_TYPE_MAX(time_t)))
150 tv->tv_usec -= (suseconds_t) PA_USEC_PER_SEC;
156 tv->tv_sec = PA_INT_TYPE_MAX(time_t);
157 tv->tv_usec = (suseconds_t) (PA_USEC_PER_SEC-1);
161 struct timeval* pa_timeval_sub(struct timeval *tv, pa_usec_t v) {
165 secs = (time_t) (v/PA_USEC_PER_SEC);
167 if (PA_UNLIKELY(tv->tv_sec < secs))
171 v -= (pa_usec_t) secs * PA_USEC_PER_SEC;
173 if (tv->tv_usec >= (suseconds_t) v)
174 tv->tv_usec -= (suseconds_t) v;
177 if (PA_UNLIKELY(tv->tv_sec <= 0))
181 tv->tv_usec += (suseconds_t) (PA_USEC_PER_SEC - v);
192 struct timeval* pa_timeval_store(struct timeval *tv, pa_usec_t v) {
195 if (PA_UNLIKELY(v == PA_USEC_INVALID)) {
196 tv->tv_sec = PA_INT_TYPE_MAX(time_t);
197 tv->tv_usec = (suseconds_t) (PA_USEC_PER_SEC-1);
202 tv->tv_sec = (time_t) (v / PA_USEC_PER_SEC);
203 tv->tv_usec = (suseconds_t) (v % PA_USEC_PER_SEC);
208 pa_usec_t pa_timeval_load(const struct timeval *tv) {
210 if (PA_UNLIKELY(!tv))
211 return PA_USEC_INVALID;
214 (pa_usec_t) tv->tv_sec * PA_USEC_PER_SEC +
215 (pa_usec_t) tv->tv_usec;