# include <mmsystem.h>
#endif
-#if defined( UNDER_CE )
-# include <windows.h>
-#endif
-
#if defined(HAVE_SYS_TIME_H)
# include <sys/time.h>
#endif
+#if defined(__APPLE__) && !defined(__powerpc__) && !defined(__ppc__) && !defined(__ppc64__)
+#define USE_APPLE_MACH 1
+# include <mach/mach.h>
+# include <mach/mach_time.h>
+#endif
+
#if !defined(HAVE_STRUCT_TIMESPEC)
struct timespec
{
# if (_POSIX_CLOCK_SELECTION < 0)
/*
- * We cannot use the monotonic clock is clock selection is not available,
+ * We cannot use the monotonic clock if clock selection is not available,
* as it would screw vlc_cond_timedwait() completely. Instead, we have to
- * stick to the realtime clock. Nevermind it screws everything when ntpdate
+ * stick to the realtime clock. Nevermind it screws everything up when ntpdate
* warps the wall clock.
*/
# undef CLOCK_MONOTONIC
* \param psz_buffer should be a buffer at least MSTRTIME_MAX_SIZE characters
* \return psz_buffer is returned so this can be used as printf parameter.
*/
-char *secstotimestr( char *psz_buffer, int i_seconds )
+char *secstotimestr( char *psz_buffer, int32_t i_seconds )
{
- int i_hours, i_mins;
- i_mins = i_seconds / 60;
- i_hours = i_mins / 60 ;
- if( i_hours )
+ if( unlikely(i_seconds < 0) )
{
- snprintf( psz_buffer, MSTRTIME_MAX_SIZE, "%d:%2.2d:%2.2d",
- (int) i_hours,
- (int) (i_mins % 60),
- (int) (i_seconds % 60) );
+ secstotimestr( psz_buffer + 1, -i_seconds );
+ *psz_buffer = '-';
+ return psz_buffer;
}
+
+ div_t d;
+
+ d = div( i_seconds, 60 );
+ i_seconds = d.rem;
+ d = div( d.quot, 60 );
+
+ if( d.quot )
+ snprintf( psz_buffer, MSTRTIME_MAX_SIZE, "%u:%02u:%02u",
+ d.quot, d.rem, i_seconds );
else
- {
- snprintf( psz_buffer, MSTRTIME_MAX_SIZE, "%2.2d:%2.2d",
- (int) i_mins ,
- (int) (i_seconds % 60) );
- }
- return( psz_buffer );
+ snprintf( psz_buffer, MSTRTIME_MAX_SIZE, "%02u:%02u",
+ d.rem, i_seconds );
+ return psz_buffer;
}
#if defined (HAVE_CLOCK_NANOSLEEP)
#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
*
#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 */
- static mtime_t freq = INT64_C(-1);
+ LARGE_INTEGER counter, freq;
+ if (!QueryPerformanceCounter (&counter)
+ || !QueryPerformanceFrequency (&freq))
+ abort();
- if( freq == INT64_C(-1) )
- {
- /* Extract from the Tcl source code:
- * (http://www.cs.man.ac.uk/fellowsd-bin/TIP/7.html)
- *
- * Some hardware abstraction layers use the CPU clock
- * in place of the real-time clock as a performance counter
- * reference. This results in:
- * - inconsistent results among the processors on
- * multi-processor systems.
- * - unpredictable changes in performance counter frequency
- * on "gearshift" processors such as Transmeta and
- * SpeedStep.
- * There seems to be no way to test whether the performance
- * counter is reliable, but a useful heuristic is that
- * if its frequency is 1.193182 MHz or 3.579545 MHz, it's
- * derived from a colorburst crystal and is therefore
- * the RTC rather than the TSC. If it's anything else, we
- * presume that the performance counter is unreliable.
- */
- LARGE_INTEGER buf;
-
- freq = ( QueryPerformanceFrequency( &buf ) &&
- (buf.QuadPart == INT64_C(1193182) || buf.QuadPart == INT64_C(3579545) ) )
- ? buf.QuadPart : 0;
-
-#if defined( WIN32 )
- /* on windows 2000, XP and Vista detect if there are two
- cores there - that makes QueryPerformanceFrequency in
- any case not trustable?
- (may also be true, for single cores with adaptive
- CPU frequency and active power management?)
- */
- HINSTANCE h_Kernel32 = LoadLibrary(_T("kernel32.dll"));
- if(h_Kernel32)
- {
- void WINAPI (*pf_GetSystemInfo)(LPSYSTEM_INFO);
- pf_GetSystemInfo = (void WINAPI (*)(LPSYSTEM_INFO))
- GetProcAddress(h_Kernel32, _T("GetSystemInfo"));
- if(pf_GetSystemInfo)
- {
- SYSTEM_INFO system_info;
- pf_GetSystemInfo(&system_info);
- if(system_info.dwNumberOfProcessors > 1)
- freq = 0;
- }
- FreeLibrary(h_Kernel32);
- }
-#endif
- }
-
- if( freq != 0 )
- {
- LARGE_INTEGER counter;
- QueryPerformanceCounter (&counter);
+ /* 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);
- /* 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);
+ res = (d.quot * 1000000) + ((d.rem * 1000000) / freq.QuadPart);
- res = (d.quot * 1000000) + ((d.rem * 1000000) / freq);
- }
- else
- {
- /* Fallback on timeGetTime() which has a millisecond resolution
- * (actually, best case is about 5 ms resolution)
- * timeGetTime() only returns a DWORD thus will wrap after
- * about 49.7 days so we try to detect the wrapping. */
-
- static CRITICAL_SECTION date_lock;
- static mtime_t i_previous_time = INT64_C(-1);
- static int i_wrap_counts = -1;
-
- if( i_wrap_counts == -1 )
- {
- /* Initialization */
-#if defined( WIN32 )
- i_previous_time = INT64_C(1000) * timeGetTime();
-#else
- i_previous_time = INT64_C(1000) * GetTickCount();
-#endif
- InitializeCriticalSection( &date_lock );
- i_wrap_counts = 0;
- }
-
- EnterCriticalSection( &date_lock );
-#if defined( WIN32 )
- res = INT64_C(1000) *
- (i_wrap_counts * INT64_C(0x100000000) + timeGetTime());
-#else
- res = INT64_C(1000) *
- (i_wrap_counts * INT64_C(0x100000000) + GetTickCount());
-#endif
- if( i_previous_time > res )
- {
- /* Counter wrapped */
- i_wrap_counts++;
- res += INT64_C(0x100000000) * 1000;
- }
- i_previous_time = res;
- LeaveCriticalSection( &date_lock );
- }
#else
struct timeval tv_date;
return res;
}
+#undef mwait
/**
* Wait for a date
*
*/
void msleep( mtime_t delay )
{
-#ifndef NDEBUG
-# if defined (__linux__) || defined (WIN32)
- /* We assume that proper use of msleep() will not use a constant period...
- * Media synchronization is likely to use mwait() with at least slight
- * sleep length variation at microsecond precision. Network protocols
- * normally have exponential backoffs, or long delays. */
- static __thread unsigned tick_period = 0;
- static __thread unsigned tick_frequency = 0;
- if (tick_period != delay)
- tick_frequency = 0;
- tick_frequency++;
- tick_period = delay;
- if (delay < (29 * CLOCK_FREQ) && tick_frequency == 20)
- {
- fprintf (stderr, "Likely bogus delay(%"PRIu64"µs) ", delay);
- vlc_backtrace ();
- }
- //fprintf (stderr, "%u, %u\n", tick_period, tick_frequency);
-# endif
-#endif
-
#if defined( HAVE_CLOCK_NANOSLEEP )
lldiv_t d = lldiv( delay, 1000000 );
struct timespec ts = { d.quot, d.rem * 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;
return p_date->date;
}
+/**
+ * Decrement the date and return the result, taking into account
+ * rounding errors.
+ *
+ * \param date to decrement
+ * \param decrementation in number of samples
+ * \return date value
+ */
+mtime_t date_Decrement( date_t *p_date, uint32_t i_nb_samples )
+{
+ mtime_t i_dividend = (mtime_t)i_nb_samples * 1000000 * p_date->i_divider_den;
+ p_date->date -= i_dividend / p_date->i_divider_num;
+ unsigned i_rem_adjust = i_dividend % p_date->i_divider_num;
+
+ if( p_date->i_remainder < i_rem_adjust )
+ {
+ /* This is Bresenham algorithm. */
+ assert( p_date->i_remainder > -p_date->i_divider_num);
+ p_date->date -= 1;
+ p_date->i_remainder += p_date->i_divider_num;
+ }
+
+ p_date->i_remainder -= i_rem_adjust;
+
+ return p_date->date;
+}
+
#ifndef HAVE_GETTIMEOFDAY
#ifdef WIN32
projects / vlc / blobdiff