-#if defined (HAVE_CLOCK_NANOSLEEP)
-static unsigned prec = 0;
-
-static void mprec_once( void )
-{
- struct timespec ts;
- if( clock_getres( CLOCK_MONOTONIC, &ts ))
- clock_getres( CLOCK_REALTIME, &ts );
-
- prec = ts.tv_nsec / 1000;
-}
-#endif
-
-/**
- * Return a value that is no bigger than the clock precision
- * (possibly zero).
- */
-static inline unsigned mprec( void )
-{
-#if defined (HAVE_CLOCK_NANOSLEEP)
- static pthread_once_t once = PTHREAD_ONCE_INIT;
- pthread_once( &once, mprec_once );
- return prec;
-#else
- return 0;
-#endif
-}
-
-#ifdef USE_APPLE_MACH
-static mach_timebase_info_data_t mtime_timebase_info;
-static pthread_once_t mtime_timebase_info_once = PTHREAD_ONCE_INIT;
-static void mtime_init_timebase(void)
-{
- mach_timebase_info(&mtime_timebase_info);
-}
-#endif
-
-/**
- * Return high precision date
- *
- * Use a 1 MHz clock when possible, or 1 kHz
- *
- * Beware ! It doesn't reflect the actual date (since epoch), but can be the machine's uptime or anything (when monotonic clock is used)
- */
-mtime_t mdate( void )
-{
- mtime_t res;
-
-#if defined (HAVE_CLOCK_NANOSLEEP)
- struct timespec ts;
-
- /* Try to use POSIX monotonic clock if available */
- if( clock_gettime( CLOCK_MONOTONIC, &ts ) == EINVAL )
- /* Run-time fallback to real-time clock (always available) */
- (void)clock_gettime( CLOCK_REALTIME, &ts );
-
- res = ((mtime_t)ts.tv_sec * (mtime_t)1000000)
- + (mtime_t)(ts.tv_nsec / 1000);
-
-#elif defined( HAVE_KERNEL_OS_H )
- res = real_time_clock_usecs();
-
-#elif defined( USE_APPLE_MACH )
- pthread_once(&mtime_timebase_info_once, mtime_init_timebase);
- uint64_t date = mach_absolute_time();
- mach_timebase_info_data_t tb = mtime_timebase_info;
-
- /* tb.denom is uint32_t, switch to 64 bits to prevent overflow. */
- uint64_t denom = tb.denom;
-
- /* Switch to microsecs */
- denom *= 1000LL;
-
- /* Split the division to prevent overflow */
- lldiv_t d = lldiv (tb.numer, denom);
-
- res = (d.quot * date) + ((d.rem * date) / denom);
-
-#elif defined( WIN32 ) || defined( UNDER_CE )
- /* We don't need the real date, just the value of a high precision timer */
- LARGE_INTEGER counter, freq;
- if (!QueryPerformanceCounter (&counter)
- || !QueryPerformanceFrequency (&freq))
- abort();
-
- /* Convert to from (1/freq) to microsecond resolution */
- /* We need to split the division to avoid 63-bits overflow */
- lldiv_t d = lldiv (counter.QuadPart, freq.QuadPart);
-
- res = (d.quot * 1000000) + ((d.rem * 1000000) / freq.QuadPart);
-
-#else
- struct timeval tv_date;
-
- /* gettimeofday() cannot fail given &tv_date is a valid address */
- (void)gettimeofday( &tv_date, NULL );
- res = (mtime_t) tv_date.tv_sec * 1000000 + (mtime_t) tv_date.tv_usec;
-#endif
-
- return res;
-}
-
-#undef mwait
-/**
- * Wait for a date
- *
- * This function uses select() and an system date function to wake up at a
- * precise date. It should be used for process synchronization. If current date
- * is posterior to wished date, the function returns immediately.
- * \param date The date to wake up at
- */
-void mwait( mtime_t date )
-{
- /* If the deadline is already elapsed, or within the clock precision,
- * do not even bother the system timer. */
- date -= mprec();
-
-#if defined (HAVE_CLOCK_NANOSLEEP)
- lldiv_t d = lldiv( date, 1000000 );
- struct timespec ts = { d.quot, d.rem * 1000 };
-
- int val;
- while( ( val = clock_nanosleep( CLOCK_MONOTONIC, TIMER_ABSTIME, &ts,
- NULL ) ) == EINTR );
- if( val == EINVAL )
- {
- ts.tv_sec = d.quot; ts.tv_nsec = d.rem * 1000;
- while( clock_nanosleep( CLOCK_REALTIME, 0, &ts, NULL ) == EINTR );
- }
-
-#elif defined (WIN32)
- mtime_t i_total;
-
- while( (i_total = (date - mdate())) > 0 )
- {
- const mtime_t i_sleep = i_total / 1000;
- DWORD i_delay = (i_sleep > 0x7fffffff) ? 0x7fffffff : i_sleep;
- vlc_testcancel();
- SleepEx( i_delay, TRUE );
- }
- vlc_testcancel();
-
-#else
- mtime_t delay = date - mdate();
- if( delay > 0 )
- msleep( delay );
-
-#endif
-}
-
-
-#include "libvlc.h" /* vlc_backtrace() */
-#undef msleep
-
-/**
- * Portable usleep(). Cancellation point.
- *
- * \param delay the amount of time to sleep
- */
-void msleep( mtime_t delay )
-{
-#if defined( HAVE_CLOCK_NANOSLEEP )
- lldiv_t d = lldiv( delay, 1000000 );
- struct timespec ts = { d.quot, d.rem * 1000 };
-
- int val;
- while( ( val = clock_nanosleep( CLOCK_MONOTONIC, 0, &ts, &ts ) ) == EINTR );
- if( val == EINVAL )
- {
- ts.tv_sec = d.quot; ts.tv_nsec = d.rem * 1000;
- while( clock_nanosleep( CLOCK_REALTIME, 0, &ts, &ts ) == EINTR );
- }
-
-#elif defined( HAVE_KERNEL_OS_H )
- snooze( delay );
-
-#elif defined( WIN32 ) || defined( UNDER_CE )
- mwait (mdate () + delay);
-
-#elif defined( HAVE_NANOSLEEP )
- struct timespec ts_delay;
-
- ts_delay.tv_sec = delay / 1000000;
- ts_delay.tv_nsec = (delay % 1000000) * 1000;
-
- while( nanosleep( &ts_delay, &ts_delay ) && ( errno == EINTR ) );
-
-#elif defined (USE_APPLE_MACH)
- /* The version that should be used, if it was cancelable */
- pthread_once(&mtime_timebase_info_once, mtime_init_timebase);
- uint64_t mach_time = delay * 1000 * mtime_timebase_info.denom / mtime_timebase_info.numer;
- mach_wait_until(mach_time + mach_absolute_time());
-
-#else
- struct timeval tv_delay;
-
- tv_delay.tv_sec = delay / 1000000;
- tv_delay.tv_usec = delay % 1000000;
-
- /* If a signal is caught, you are screwed. Update your OS to nanosleep()
- * or clock_nanosleep() if this is an issue. */
- select( 0, NULL, NULL, NULL, &tv_delay );
-#endif
-}
-