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core-rtclock.c: tweak OS_IS_DARWIN constraints

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Move the code for OS_IS_DARWIN to the top as on Darwin,
HAVE_CLOCK_GETTIME is also defined.
This commit is contained in:
Daniel Mack 2009-11-01 20:06:08 +01:00
parent 76acaa964e
commit a46ddfebb5
1 changed files with 31 additions and 44 deletions
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75
src/pulsecore/core-rtclock.c
View file

@ -37,6 +37,7 @@
#include <CoreServices/CoreServices.h>
#include <mach/mach.h>
#include <mach/mach_time.h>
#include <unistd.h>
#endif
#include <pulse/timeval.h>
@ -54,7 +55,19 @@ pa_usec_t pa_rtclock_age(const struct timeval *tv) {
struct timeval *pa_rtclock_get(struct timeval *tv) {
#if defined(HAVE_CLOCK_GETTIME)
#if defined(OS_IS_DARWIN)
uint64_t val, abs_time = mach_absolute_time();
Nanoseconds nanos;
nanos = AbsoluteToNanoseconds(*(AbsoluteTime *) &abs_time);
val = *(uint64_t *) &nanos;
tv->tv_sec = val / PA_NSEC_PER_SEC;
tv->tv_usec = (val % PA_NSEC_PER_SEC) / PA_NSEC_PER_USEC;
return tv;
#elif defined(HAVE_CLOCK_GETTIME)
struct timespec ts;
#ifdef CLOCK_MONOTONIC
@ -75,52 +88,14 @@ struct timeval *pa_rtclock_get(struct timeval *tv) {
tv->tv_usec = ts.tv_nsec / PA_NSEC_PER_USEC;
return tv;
#elif defined(OS_IS_DARWIN)
static mach_timebase_info_data_t tbi;
uint64_t nticks;
uint64_t time_nsec;
/* Refer Apple ADC QA1398
Also: http://devworld.apple.com/documentation/Darwin/Conceptual/KernelProgramming/services/services.html
Note: argument is timespec NOT timeval (timespec uses nsec, timeval uses usec)
*/
/* try and be a mite efficient - maybe I should keep the N/D as a float !? */
if (tbi.denom == 0)
mach_timebase_info(&tbi);
nticks = mach_absolute_time();
time_nsec = nticks * tbi.numer / tbi.denom; // see above
tv->tv_sec = time_nsec / PA_NSEC_PER_SEC;
tv->tv_usec = time_nsec / PA_NSEC_PER_USEC;
return tv;
#else /* OS_IS_DARWIN */
#endif /* HAVE_CLOCK_GETTIME */
return pa_gettimeofday(tv);
#endif
}
pa_bool_t pa_rtclock_hrtimer(void) {
#if defined(HAVE_CLOCK_GETTIME)
struct timespec ts;
#ifdef CLOCK_MONOTONIC
if (clock_getres(CLOCK_MONOTONIC, &ts) >= 0)
return ts.tv_sec == 0 && ts.tv_nsec <= (long) (PA_HRTIMER_THRESHOLD_USEC*PA_NSEC_PER_USEC);
#endif /* CLOCK_MONOTONIC */
pa_assert_se(clock_getres(CLOCK_REALTIME, &ts) == 0);
return ts.tv_sec == 0 && ts.tv_nsec <= (long) (PA_HRTIMER_THRESHOLD_USEC*PA_NSEC_PER_USEC);
#elif defined (OS_IS_DARWIN)
#if defined (OS_IS_DARWIN)
mach_timebase_info_data_t tbi;
uint64_t time_nsec;
@ -130,10 +105,22 @@ pa_bool_t pa_rtclock_hrtimer(void) {
time_nsec = tbi.numer / tbi.denom;
return time_nsec <= (long) (PA_HRTIMER_THRESHOLD_USEC*PA_NSEC_PER_USEC);
#else /* OS_IS_DARWIN */
return FALSE;
#elif defined(HAVE_CLOCK_GETTIME)
struct timespec ts;
#endif
#ifdef CLOCK_MONOTONIC
if (clock_getres(CLOCK_MONOTONIC, &ts) >= 0)
return ts.tv_sec == 0 && ts.tv_nsec <= (long) (PA_HRTIMER_THRESHOLD_USEC*PA_NSEC_PER_USEC);
#endif /* CLOCK_MONOTONIC */
pa_assert_se(clock_getres(CLOCK_REALTIME, &ts) == 0);
return ts.tv_sec == 0 && ts.tv_nsec <= (long) (PA_HRTIMER_THRESHOLD_USEC*PA_NSEC_PER_USEC);
#endif /* HAVE_CLOCK_GETTIME */
return FALSE;
}
#define TIMER_SLACK_NS (int) ((500 * PA_NSEC_PER_USEC))