Also implement correct run-time POSIX clock selection.
need_libc=false
dnl Check for usual libc functions
+AC_CHECK_DECLS([nanosleep],,,[#include <time.h>])
AC_CHECK_FUNCS([daemon fcntl fdopendir fstatvfs fork getenv getpwuid_r gettimeofday if_nameindex if_nametoindex isatty lstat memalign mmap openat pread posix_fadvise posix_madvise posix_memalign setlocale stricmp strnicmp uselocale])
AC_REPLACE_FUNCS([asprintf atof atoll dirfd flockfile fsync getdelim getpid gmtime_r lldiv localtime_r nrand48 rewind setenv strcasecmp strcasestr strdup strlcpy strncasecmp strndup strnlen strsep strtof strtok_r strtoll swab tdestroy vasprintf])
AC_CHECK_FUNCS(fdatasync,,
AC_CHECK_LIB(rt, clock_nanosleep, [
VLC_ADD_LIBS([libvlccore],[-lrt])
- AC_DEFINE(HAVE_CLOCK_NANOSLEEP, 1, [Define to 1 if you have clock_nanosleep.])
], [
+ AC_CHECK_FUNC(nanosleep,,[
+ AC_CHECK_LIB(rt,nanosleep, [
+ VLC_ADD_LIBS([libvlccore],[-lrt])
+ ], [
+ AC_CHECK_LIB(posix4,nanosleep, [
+ VLC_ADD_LIBS([libvlccore],[-lposix4])
+ ])
+ ])
+ ])
dnl HP/UX port
AC_CHECK_LIB(rt,sem_init, [VLC_ADD_LIBS([libvlccore],[-lrt])])
])
-
- have_nanosleep=false
- AC_CHECK_FUNCS(nanosleep,have_nanosleep=:,[
- AC_CHECK_LIB(rt,nanosleep,
- [VLC_ADD_LIBS([libvlccore],[-lrt]) have_nanosleep=:],
- [AC_CHECK_LIB(posix4,nanosleep,
- [VLC_ADD_LIBS([libvlccore],[-lposix4]) have_nanosleep=:])]
- )
- ])
- if ${have_nanosleep}; then
- AC_DEFINE(HAVE_NANOSLEEP, 1, [Define if nanosleep is available.])
- fi
fi # end "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"
dnl Check for misc headers
fi
])
-dnl Mac OS X and other OSes don't have declaration for nanosleep
-if test "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"; then
- AC_MSG_CHECKING(for nanosleep in time.h)
- AC_EGREP_HEADER(nanosleep,time.h,[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_DECL_NANOSLEEP, 1,
- Define if <time.h> defines nanosleep.)
- ],[
- AC_MSG_RESULT(no)
- ])
-fi # end "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"
-
-dnl Make sure we have timespecs
-AC_MSG_CHECKING(for timespec in sys/time.h)
-AC_EGREP_HEADER(timespec,sys/time.h,[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_STRUCT_TIMESPEC, 1,
- Define if <sys/time.h> defines struct timespec.)
-],[
- AC_MSG_RESULT(no)
-])
-
dnl Check for threads library
if test "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"; then
AC_CHECK_HEADERS(pthread.h)
* Prototypes
*****************************************************************************/
VLC_API char * mstrtime( char *psz_buffer, mtime_t date );
-VLC_API mtime_t mdate( void );
-VLC_API void mwait( mtime_t date );
-VLC_API void msleep( mtime_t delay );
VLC_API char * secstotimestr( char *psz_buffer, int32_t secs );
-# define VLC_HARD_MIN_SLEEP 10000 /* 10 milliseconds = 1 tick at 100Hz */
-
-#if defined (__GNUC__) \
- && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
-/* Linux has 100, 250, 300 or 1000Hz
- *
- * HZ=100 by default on FreeBSD, but some architectures use a 1000Hz timer
- */
-# define VLC_SOFT_MIN_SLEEP 9000000 /* 9 seconds */
-
-static
-__attribute__((unused))
-__attribute__((noinline))
-__attribute__((error("sorry, cannot sleep for such short a time")))
-mtime_t impossible_delay( mtime_t delay )
-{
- (void) delay;
- return VLC_HARD_MIN_SLEEP;
-}
-
-static
-__attribute__((unused))
-__attribute__((noinline))
-__attribute__((warning("use proper event handling instead of short delay")))
-mtime_t harmful_delay( mtime_t delay )
-{
- return delay;
-}
-
-# define check_delay( d ) \
- ((__builtin_constant_p(d < VLC_HARD_MIN_SLEEP) \
- && (d < VLC_HARD_MIN_SLEEP)) \
- ? impossible_delay(d) \
- : ((__builtin_constant_p(d < VLC_SOFT_MIN_SLEEP) \
- && (d < VLC_SOFT_MIN_SLEEP)) \
- ? harmful_delay(d) \
- : d))
-
-static
-__attribute__((unused))
-__attribute__((noinline))
-__attribute__((error("deadlines can not be constant")))
-mtime_t impossible_deadline( mtime_t deadline )
-{
- return deadline;
-}
-
-# define check_deadline( d ) \
- (__builtin_constant_p(d) ? impossible_deadline(d) : d)
-#else
-# define check_delay(d) (d)
-# define check_deadline(d) (d)
-#endif
-
-#define msleep(d) msleep(check_delay(d))
-#define mwait(d) mwait(check_deadline(d))
-
/*****************************************************************************
* date_t: date incrementation without long-term rounding errors
*****************************************************************************/
VLC_API void vlc_join(vlc_thread_t, void **);
VLC_API void vlc_control_cancel (int cmd, ...);
+VLC_API mtime_t mdate(void);
+VLC_API void mwait(mtime_t deadline);
+VLC_API void msleep(mtime_t delay);
+
+#define VLC_HARD_MIN_SLEEP 10000 /* 10 milliseconds = 1 tick at 100Hz */
+#define VLC_SOFT_MIN_SLEEP 9000000 /* 9 seconds */
+
+#if defined (__GNUC__) \
+ && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
+/* Linux has 100, 250, 300 or 1000Hz
+ *
+ * HZ=100 by default on FreeBSD, but some architectures use a 1000Hz timer
+ */
+
+static
+__attribute__((unused))
+__attribute__((noinline))
+__attribute__((error("sorry, cannot sleep for such short a time")))
+mtime_t impossible_delay( mtime_t delay )
+{
+ (void) delay;
+ return VLC_HARD_MIN_SLEEP;
+}
+
+static
+__attribute__((unused))
+__attribute__((noinline))
+__attribute__((warning("use proper event handling instead of short delay")))
+mtime_t harmful_delay( mtime_t delay )
+{
+ return delay;
+}
+
+# define check_delay( d ) \
+ ((__builtin_constant_p(d < VLC_HARD_MIN_SLEEP) \
+ && (d < VLC_HARD_MIN_SLEEP)) \
+ ? impossible_delay(d) \
+ : ((__builtin_constant_p(d < VLC_SOFT_MIN_SLEEP) \
+ && (d < VLC_SOFT_MIN_SLEEP)) \
+ ? harmful_delay(d) \
+ : d))
+
+static
+__attribute__((unused))
+__attribute__((noinline))
+__attribute__((error("deadlines can not be constant")))
+mtime_t impossible_deadline( mtime_t deadline )
+{
+ return deadline;
+}
+
+# define check_deadline( d ) \
+ (__builtin_constant_p(d) ? impossible_deadline(d) : d)
+#else
+# define check_delay(d) (d)
+# define check_deadline(d) (d)
+#endif
+
+#define msleep(d) msleep(check_delay(d))
+#define mwait(d) mwait(check_deadline(d))
+
VLC_API int vlc_timer_create(vlc_timer_t *, void (*) (void *), void *) VLC_USED;
VLC_API void vlc_timer_destroy(vlc_timer_t);
VLC_API void vlc_timer_schedule(vlc_timer_t, bool, mtime_t, mtime_t);
#endif
#include <vlc_common.h>
-
-#include <time.h> /* clock_gettime(), clock_nanosleep() */
#include <assert.h>
-#include <errno.h>
#ifdef HAVE_UNISTD_H
-# include <unistd.h> /* select() */
-#endif
-
-#ifdef HAVE_KERNEL_OS_H
-# include <kernel/OS.h>
-#endif
-
-#if defined( WIN32 ) || defined( UNDER_CE )
-# include <windows.h>
-# include <mmsystem.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
-{
- time_t tv_sec;
- int32_t tv_nsec;
-};
-#endif
-
-#if defined(HAVE_NANOSLEEP) && !defined(HAVE_DECL_NANOSLEEP)
-int nanosleep(struct timespec *, struct timespec *);
-#endif
-
-#if !defined (_POSIX_CLOCK_SELECTION)
-# define _POSIX_CLOCK_SELECTION (-1)
+# include <unistd.h>
#endif
-
-# if (_POSIX_CLOCK_SELECTION < 0)
-/*
- * 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 up when ntpdate
- * warps the wall clock.
- */
-# undef CLOCK_MONOTONIC
-# define CLOCK_MONOTONIC CLOCK_REALTIME
-#elif !defined (HAVE_CLOCK_NANOSLEEP)
-/* Clock selection without clock in the first place, I don't think so. */
-# error We have quite a situation here! Fix me if it ever happens.
+#if !defined (_POSIX_TIMERS)
+# define _POSIX_TIMERS (-1)
+# include <sys/time.h>
+#else
+# include <time.h> /* clock_gettime() */
#endif
/**
return psz_buffer;
}
-#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
-}
-
/*
* Date management (internal and external)
*/
*/
uint64_t NTPtime64 (void)
{
+#if (_POSIX_TIMERS > 0)
struct timespec ts;
-#if defined (CLOCK_REALTIME) && !defined (__OS2__)
+
clock_gettime (CLOCK_REALTIME, &ts);
#else
+ struct timeval tv;
+ struct
{
- struct timeval tv;
- gettimeofday (&tv, NULL);
- ts.tv_sec = tv.tv_sec;
- ts.tv_nsec = tv.tv_usec * 1000;
- }
+ uint32_t tv_sec;
+ uint32_t tv_nsec;
+ } ts;
+
+ gettimeofday (&tv, NULL);
+ ts.tv_sec = tv.tv_sec;
+ ts.tv_nsec = tv.tv_usec * 1000;
#endif
/* Convert nanoseconds to 32-bits fraction (232 picosecond units) */
#include <unistd.h> /* fsync() */
#include <signal.h>
#include <errno.h>
+#include <time.h>
#include <sched.h>
#ifdef __linux__
# include <sys/pset.h>
#endif
+#if !defined (_POSIX_TIMERS)
+# define _POSIX_TIMERS (-1)
+#endif
+#if !defined (_POSIX_CLOCK_SELECTION)
+/* Clock selection was defined in 2001 and became mandatory in 2008. */
+# define _POSIX_CLOCK_SELECTION (-1)
+#endif
+#if !defined (_POSIX_MONOTONIC_CLOCK)
+# define _POSIX_MONOTONIC_CLOCK (-1)
+#endif
+
+#if (_POSIX_TIMERS > 0)
+static unsigned vlc_clock_prec;
+
+# if (_POSIX_CLOCK_SELECTION > 0)
+/* POSIX clock selection is needed so that vlc_cond_timewait() is consistent
+ * with mdate() and mwait(). Otherwise, the monotonic clock cannot be used.
+ * Fortunately, clock selection has become mandatory as of 2008 so that really
+ * only broken old systems still lack it. */
+
+# if (_POSIX_MONOTONIC_CLOCK > 0)
+/* Compile-time POSIX monotonic clock support */
+# define vlc_clock_id (CLOCK_MONOTONIC)
+
+# elif (_POSIX_MONOTONIC_CLOCK == 0)
+/* Run-time POSIX monotonic clock support (see clock_setup() below) */
+static clockid_t vlc_clock_id;
+
+# else
+/* No POSIX monotonic clock support */
+# define vlc_clock_id (CLOCK_REALTIME)
+# warning Monotonic clock not available. Expect timing issues.
+
+# endif /* _POSIX_MONOTONIC_CLOKC */
+# else
+/* No POSIX clock selection. */
+# define pthread_condattr_setclock(attr, clock) (attr, clock, 0)
+# warning Clock selection not available. Expect timing issues.
+
+# endif /* _POSIX_CLOCK_SELECTION */
+
+static void vlc_clock_setup_once (void)
+{
+# if (_POSIX_MONOTONIC_CLOCK == 0)
+ long val = sysconf (_SC_MONOTONIC_CLOCK);
+ assert (val != 0);
+ vlc_clock_id = (val < 0) ? CLOCK_REALTIME : CLOCK_MONOTONIC;
+# endif
+
+ struct timespec res;
+ if (unlikely(clock_getres (vlc_clock_id, &res) != 0 || res.tv_sec != 0))
+ abort ();
+ vlc_clock_prec = (res.tv_nsec + 500) / 1000;
+}
+
+static pthread_once_t vlc_clock_once = PTHREAD_ONCE_INIT;
+
+# define vlc_clock_setup() \
+ pthread_once(&vlc_clock_once, vlc_clock_setup_once)
+
+#else /* _POSIX_TIMERS */
+
+# include <sys/time.h> /* gettimeofday() */
+# if defined (HAVE_DECL_NANOSLEEP) && !HAVE_DECL_NANOSLEEP
+int nanosleep (struct timespec *, struct timespec *);
+# endif
+
+#endif /* _POSIX_TIMERS */
/**
* Print a backtrace to the standard error for debugging purpose.
{
pthread_condattr_t attr;
+ vlc_clock_setup ();
if (unlikely(pthread_condattr_init (&attr)))
abort ();
-#if !defined (_POSIX_CLOCK_SELECTION)
- /* Fairly outdated POSIX support (that was defined in 2001) */
-# define _POSIX_CLOCK_SELECTION (-1)
-#endif
-#if (_POSIX_CLOCK_SELECTION >= 0)
- /* NOTE: This must be the same clock as the one in mtime.c */
- pthread_condattr_setclock (&attr, CLOCK_MONOTONIC);
-#endif
+ pthread_condattr_setclock (&attr, vlc_clock_id);
if (unlikely(pthread_cond_init (p_condvar, &attr)))
abort ();
assert (0);
}
+/**
+ * Precision monotonic clock.
+ *
+ * In principles, the clock has a precision of 1 MHz. But the actual resolution
+ * may be much lower, especially when it comes to sleeping with mwait() or
+ * msleep(). Most general-purpose operating systems provide a resolution of
+ * only 100 to 1000 Hz.
+ *
+ * @warning The origin date (time value "zero") is not specified. It is
+ * typically the time the kernel started, but this is platform-dependent.
+ * If you need wall clock time, use gettimeofday() instead.
+ *
+ * @return a timestamp in microseconds.
+ */
+mtime_t mdate (void)
+{
+#if (_POSIX_TIMERS > 0)
+ struct timespec ts;
+
+ vlc_clock_setup ();
+ if (unlikely(clock_gettime (vlc_clock_id, &ts) != 0))
+ abort ();
+
+ return (INT64_C(1000000) * ts.tv_sec) + (ts.tv_nsec / 1000);
+
+#else
+ struct timeval tv;
+
+ if (unlikely(gettimeofday (&tv, NULL) != 0))
+ abort ();
+ return (INT64_C(1000000) * tv.tv_sec) + tv.tv_nsec;
+
+#endif
+}
+
+#undef mwait
+/**
+ * Waits until a deadline (possibly later due to OS scheduling).
+ * @param deadline timestamp to wait for (see mdate())
+ */
+void mwait (mtime_t deadline)
+{
+#if (_POSIX_TIMERS > 0)
+ vlc_clock_setup ();
+ /* If the deadline is already elapsed, or within the clock precision,
+ * do not even bother the system timer. */
+ deadline -= vlc_clock_prec;
+
+ lldiv_t d = lldiv (deadline, 1000000);
+ struct timespec ts = { d.quot, d.rem * 1000 };
+
+ while (clock_nanosleep (vlc_clock_id, TIMER_ABSTIME, &ts, NULL) == EINTR);
+
+#else
+ deadline -= mdate ();
+ if (deadline > 0)
+ msleep (deadline);
+
+#endif
+}
+
+#undef msleep
+/**
+ * Waits for an interval of time.
+ * @param delay how long to wait (in microseconds)
+ */
+void msleep (mtime_t delay)
+{
+ vlc_clock_setup ();
+
+ lldiv_t d = lldiv (delay, 1000000);
+ struct timespec ts = { d.quot, d.rem * 1000 };
+
+#if (_POSIX_TIMERS > 0)
+ while (clock_nanosleep (vlc_clock_id, 0, &ts, &ts) == EINTR);
+
+#else
+ while (nanosleep (&ts, &ts) == -1)
+ assert (errno == EINTR);
+
+#endif
+}
+
struct vlc_timer
{
}
+/*** Clock ***/
+mtime_t mdate (void)
+{
+ /* 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);
+
+ return (d.quot * 1000000) + ((d.rem * 1000000) / freq.QuadPart);
+}
+
+#undef mwait
+void mwait (mtime_t deadline)
+{
+ mtime_t delay;
+
+ vlc_testcancel();
+ while ((delay = (deadline - mdate())) > 0)
+ {
+ delay /= 1000;
+ if (unlikely(delay > 0x7fffffff))
+ delay = 0x7fffffff;
+ SleepEx (delay, TRUE);
+ vlc_testcancel();
+ }
+}
+
+#undef msleep
+void msleep (mtime_t delay)
+{
+ mwait (mdate () + delay);
+}
+
+
/*** Timers ***/
struct vlc_timer
{
projects / vlc / commitdiff