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SysClocks need their own mutex/cond pair, as we have multiple (via subclasses). Use a static mutex for setting THE sy...

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Original commit message from CVS:
SysClocks need their own mutex/cond pair, as we have multiple (via subclasses). Use a static mutex for setting THE system clock
This commit is contained in:
Benjamin Otte 2003-05-10 14:38:48 +00:00
parent b74e6f24f2
commit e8bc3500f3
2 changed files with 25 additions and 15 deletions
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37
gst/gstsystemclock.c
View file

@ -38,8 +38,7 @@ static guint64 gst_system_clock_get_resolution (GstClock *clock);
static GstClockEntryStatus gst_system_clock_wait (GstClock *clock, GstClockEntry *entry);
static void gst_system_clock_unlock (GstClock *clock, GstClockEntry *entry);
static GCond *_gst_sysclock_cond = NULL;
static GMutex *_gst_sysclock_mutex = NULL;
static GStaticMutex _gst_sysclock_mutex = G_STATIC_MUTEX_INIT;
static GstClockClass *parent_class = NULL;
/* static guint gst_system_clock_signals[LAST_SIGNAL] = { 0 }; */
@ -87,20 +86,20 @@ gst_system_clock_class_init (GstSystemClockClass *klass)
gstclock_class->get_resolution = gst_system_clock_get_resolution;
gstclock_class->wait = gst_system_clock_wait;
gstclock_class->unlock = gst_system_clock_unlock;
_gst_sysclock_cond = g_cond_new ();
_gst_sysclock_mutex = g_mutex_new ();
}
static void
gst_system_clock_init (GstSystemClock *clock)
{
clock->mutex = g_mutex_new();
clock->cond = g_cond_new ();
}
static void
gst_system_clock_dispose (GObject *object)
{
GstClock *clock = (GstClock *) object;
GstSystemClock *sysclock = (GstSystemClock *) object;
/* there are subclasses of GstSystemClock running around... */
if (_the_system_clock == clock) {
@ -109,6 +108,10 @@ gst_system_clock_dispose (GObject *object)
/* no parent dispose here, this is bad enough already */
} else {
G_OBJECT_CLASS (parent_class)->dispose (object);
/* FIXME: Notifying before freeing? */
g_cond_free (sysclock->cond);
g_mutex_free (sysclock->mutex);
}
}
@ -125,9 +128,10 @@ gst_system_clock_obtain (void)
GstClock *clock = _the_system_clock;
if (clock == NULL) {
g_mutex_lock (_gst_sysclock_mutex);
if (clock != NULL) {
g_mutex_unlock (_gst_sysclock_mutex);
g_static_mutex_lock (&_gst_sysclock_mutex);
if (_the_system_clock != NULL) {
clock = _the_system_clock;
g_static_mutex_unlock (&_gst_sysclock_mutex);
goto have_clock;
}
@ -139,7 +143,7 @@ gst_system_clock_obtain (void)
gst_object_sink (GST_OBJECT (clock));
_the_system_clock = clock;
g_mutex_unlock (_gst_sysclock_mutex);
g_static_mutex_unlock (&_gst_sysclock_mutex);
}
have_clock:
@ -169,6 +173,7 @@ gst_system_clock_wait (GstClock *clock, GstClockEntry *entry)
GstClockEntryStatus res;
GstClockTime current, target;
gint64 diff;
GstSystemClock *sysclock = GST_SYSTEM_CLOCK (clock);
current = gst_clock_get_time (clock);
diff = GST_CLOCK_ENTRY_TIME (entry) - current;
@ -190,9 +195,9 @@ gst_system_clock_wait (GstClock *clock, GstClockEntry *entry)
GTimeVal tv;
GST_TIME_TO_TIMEVAL (target, tv);
g_mutex_lock (_gst_sysclock_mutex);
g_cond_timed_wait (_gst_sysclock_cond, _gst_sysclock_mutex, &tv);
g_mutex_unlock (_gst_sysclock_mutex);
g_mutex_lock (sysclock->mutex);
g_cond_timed_wait (sysclock->cond, sysclock->mutex, &tv);
g_mutex_unlock (sysclock->mutex);
res = entry->status;
}
else {
@ -204,7 +209,9 @@ gst_system_clock_wait (GstClock *clock, GstClockEntry *entry)
static void
gst_system_clock_unlock (GstClock *clock, GstClockEntry *entry)
{
g_mutex_lock (_gst_sysclock_mutex);
g_cond_broadcast (_gst_sysclock_cond);
g_mutex_unlock (_gst_sysclock_mutex);
GstSystemClock *sysclock = GST_SYSTEM_CLOCK (clock);
g_mutex_lock (sysclock->mutex);
g_cond_broadcast (sysclock->cond);
g_mutex_unlock (sysclock->mutex);
}

3
gst/gstsystemclock.h
View file

@ -41,6 +41,9 @@ typedef struct _GstSystemClockClass GstSystemClockClass;
struct _GstSystemClock {
GstClock clock;
GMutex * mutex;
GCond * cond;
};
struct _GstSystemClockClass {