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code.delx.au - pulseaudio/blob - src/pulse/timeval.c
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/winsock.h>
35 #include <pulsecore/macro.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_timeval_cmp(a
, b
) < 0) {
86 const struct timeval
*c
;
92 /* Calculate the second difference*/
93 r
= ((pa_usec_t
) a
->tv_sec
- 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
- b
->tv_usec
);
98 else if (a
->tv_usec
< b
->tv_usec
)
99 r
-= ((pa_usec_t
) b
->tv_usec
- 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
= (unsigned long) (v
/PA_USEC_PER_SEC
);
136 v
-= ((pa_usec_t
) secs
) * PA_USEC_PER_SEC
;
138 tv
->tv_usec
+= (suseconds_t
) v
;
141 while ((unsigned) tv
->tv_usec
>= PA_USEC_PER_SEC
) {
143 tv
->tv_usec
-= PA_USEC_PER_SEC
;
149 struct timeval
* pa_timeval_sub(struct timeval
*tv
, pa_usec_t v
) {
153 secs
= (unsigned long) (v
/PA_USEC_PER_SEC
);
155 v
-= ((pa_usec_t
) secs
) * PA_USEC_PER_SEC
;
157 if (tv
->tv_usec
>= (suseconds_t
) v
)
158 tv
->tv_usec
-= (suseconds_t
) v
;
161 tv
->tv_usec
= tv
->tv_usec
+ PA_USEC_PER_SEC
- v
;
167 struct timeval
* pa_timeval_store(struct timeval
*tv
, pa_usec_t v
) {
170 tv
->tv_sec
= v
/ PA_USEC_PER_SEC
;
171 tv
->tv_usec
= v
% PA_USEC_PER_SEC
;
176 pa_usec_t
pa_timeval_load(const struct timeval
*tv
) {
180 (pa_usec_t
) tv
->tv_sec
* PA_USEC_PER_SEC
+
181 (pa_usec_t
) tv
->tv_usec
;