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/* $Id$ */
/***
This file is part of PulseAudio.
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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.h>
#include <stddef.h>
#include <sys/time.h>
#ifdef HAVE_WINDOWS_H
#include <windows.h>
#endif
#include "../pulsecore/winsock.h"
#include "timeval.h"
struct timeval *pa_gettimeofday(struct timeval *tv) {
#ifdef HAVE_GETTIMEOFDAY
assert(tv);
return gettimeofday(tv, NULL) < 0 ? NULL : tv;
#elif defined(OS_IS_WIN32)
/*
* Copied from implementation by Steven Edwards (LGPL).
* Found on wine mailing list.
*/
#if defined(_MSC_VER) || defined(__BORLANDC__)
#define EPOCHFILETIME (116444736000000000i64)
#else
#define EPOCHFILETIME (116444736000000000LL)
#endif
FILETIME ft;
LARGE_INTEGER li;
__int64 t;
assert(tv);
GetSystemTimeAsFileTime(&ft);
li.LowPart = ft.dwLowDateTime;
li.HighPart = ft.dwHighDateTime;
t = li.QuadPart; /* In 100-nanosecond intervals */
t -= EPOCHFILETIME; /* Offset to the Epoch time */
t /= 10; /* In microseconds */
tv->tv_sec = (long)(t / 1000000);
tv->tv_usec = (long)(t % 1000000);
return tv;
#else
#error "Platform lacks gettimeofday() or equivalent function."
#endif
}
pa_usec_t pa_timeval_diff(const struct timeval *a, const struct timeval *b) {
pa_usec_t r;
assert(a && b);
/* Check which whan is the earlier time and swap the two arguments if reuqired. */
if (pa_timeval_cmp(a, b) < 0) {
const struct timeval *c;
c = a;
a = b;
b = c;
}
/* Calculate the second difference*/
r = ((pa_usec_t) a->tv_sec - b->tv_sec)* 1000000;
/* Calculate the microsecond difference */
if (a->tv_usec > b->tv_usec)
r += ((pa_usec_t) a->tv_usec - b->tv_usec);
else if (a->tv_usec < b->tv_usec)
r -= ((pa_usec_t) b->tv_usec - a->tv_usec);
return r;
}
int pa_timeval_cmp(const struct timeval *a, const struct timeval *b) {
assert(a && b);
if (a->tv_sec < b->tv_sec)
return -1;
if (a->tv_sec > b->tv_sec)
return 1;
if (a->tv_usec < b->tv_usec)
return -1;
if (a->tv_usec > b->tv_usec)
return 1;
return 0;
}
pa_usec_t pa_timeval_age(const struct timeval *tv) {
struct timeval now;
assert(tv);
return pa_timeval_diff(pa_gettimeofday(&now), tv);
}
struct timeval* pa_timeval_add(struct timeval *tv, pa_usec_t v) {
unsigned long secs;
assert(tv);
secs = (v/1000000);
tv->tv_sec += (unsigned long) secs;
v -= secs*1000000;
tv->tv_usec += v;
/* Normalize */
while (tv->tv_usec >= 1000000) {
tv->tv_sec++;
tv->tv_usec -= 1000000;
}
return tv;
}
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