gstreamer/gst/schedulers/threadscheduler.c
Wim Taymans add280cd10 gst/: Implement gst_pad_pause/start/stop_task(), take STREAM lock in task function.
Original commit message from CVS:
* gst/base/gstadapter.c: (gst_adapter_peek), (gst_adapter_flush):
* gst/base/gstbasesink.c: (gst_basesink_preroll_queue_push),
(gst_basesink_finish_preroll), (gst_basesink_chain),
(gst_basesink_loop), (gst_basesink_activate),
(gst_basesink_change_state):
* gst/base/gstbasesrc.c: (gst_basesrc_do_seek),
(gst_basesrc_get_range), (gst_basesrc_loop),
(gst_basesrc_activate):
* gst/elements/gsttee.c: (gst_tee_sink_activate):
* gst/gstpad.c: (gst_pad_dispose), (gst_real_pad_class_init),
(gst_real_pad_init), (gst_real_pad_set_property),
(gst_real_pad_get_property), (gst_pad_set_active),
(gst_pad_is_active), (gst_pad_get_query_types), (gst_pad_unlink),
(gst_pad_link_prepare), (gst_pad_link), (gst_pad_get_real_parent),
(gst_real_pad_get_caps_unlocked), (gst_pad_peer_get_caps),
(gst_pad_accept_caps), (gst_pad_get_peer), (gst_pad_realize),
(gst_pad_event_default_dispatch), (gst_pad_event_default),
(gst_pad_dispatcher), (gst_pad_query), (gst_real_pad_dispose),
(gst_pad_save_thyself), (handle_pad_block), (gst_pad_chain),
(gst_pad_push), (gst_pad_get_range), (gst_pad_pull_range),
(gst_pad_send_event), (gst_pad_start_task), (gst_pad_pause_task),
(gst_pad_stop_task):
* gst/gstpad.h:
* gst/gstqueue.c: (gst_queue_handle_sink_event), (gst_queue_chain),
(gst_queue_loop), (gst_queue_src_activate):
* gst/gsttask.c: (gst_task_init), (gst_task_set_lock),
(gst_task_get_state):
* gst/gsttask.h:
* gst/schedulers/threadscheduler.c:
(gst_thread_scheduler_task_start), (gst_thread_scheduler_func):
Implement gst_pad_pause/start/stop_task(), take STREAM lock
in task function.
Remove ACTIVE pad flag, use FLUSHING everywhere
Added _pad_chain(), _pad_get_range() to call chain/getrange
functions.
Add locks around IS_FLUSHING when reading.
Take STREAM lock in chain(), get_range() functions so plugins
don't need to take it anymore.
2005-05-25 11:50:11 +00:00

362 lines
9.7 KiB
C

/* GStreamer2
* Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
*
* threadscheduler.c: scheduler using threads
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <gst/gst.h>
#include "../gst-i18n-lib.h"
GST_DEBUG_CATEGORY_STATIC (debug_scheduler);
#define GST_CAT_DEFAULT debug_scheduler
#define GST_TYPE_THREAD_SCHEDULER \
(gst_thread_scheduler_get_type ())
#define GST_THREAD_SCHEDULER(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_THREAD_SCHEDULER,GstThreadScheduler))
#define GST_THREAD_SCHEDULER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_THREAD_SCHEDULER,GstThreadSchedulerClass))
#define GST_IS_THREAD_SCHEDULER(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_THREAD_SCHEDULER))
#define GST_IS_THREAD_SCHEDULER_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_THREAD_SCHEDULER))
#define SCHED(element) (GST_THREAD_SCHEDULER ((element)->sched))
GType gst_thread_scheduler_get_type (void);
typedef struct _GstThreadScheduler GstThreadScheduler;
typedef struct _GstThreadSchedulerClass GstThreadSchedulerClass;
struct _GstThreadScheduler
{
GstScheduler scheduler;
GThreadPool *pool;
};
struct _GstThreadSchedulerClass
{
GstSchedulerClass scheduler_class;
};
#define ELEMENT_PRIVATE(element) GST_ELEMENT (element)->sched_private
#define PAD_PRIVATE(pad) (GST_REAL_PAD (pad))->sched_private
#define GST_TYPE_THREAD_SCHEDULER_TASK \
(gst_thread_scheduler_task_get_type ())
#define GST_THREAD_SCHEDULER_TASK(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_THREAD_SCHEDULER_TASK,GstThreadSchedulerTask))
#define GST_THREAD_SCHEDULER_TASK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_THREAD_SCHEDULER_TASK,GstThreadSchedulerTaskClass))
#define GST_IS_THREAD_SCHEDULER_TASK(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_THREAD_SCHEDULER_TASK))
#define GST_IS_THREAD_SCHEDULER_TASK_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_THREAD_SCHEDULER_TASK))
typedef struct _GstThreadSchedulerTask GstThreadSchedulerTask;
typedef struct _GstThreadSchedulerTaskClass GstThreadSchedulerTaskClass;
struct _GstThreadSchedulerTask
{
GstTask task;
};
struct _GstThreadSchedulerTaskClass
{
GstTaskClass parent_class;
};
static void gst_thread_scheduler_task_class_init (gpointer g_class,
gpointer data);
static void gst_thread_scheduler_task_init (GstThreadSchedulerTask * object);
static gboolean gst_thread_scheduler_task_start (GstTask * task);
static gboolean gst_thread_scheduler_task_stop (GstTask * task);
static gboolean gst_thread_scheduler_task_pause (GstTask * task);
GType
gst_thread_scheduler_task_get_type (void)
{
static GType object_type = 0;
if (object_type == 0) {
static const GTypeInfo object_info = {
sizeof (GstThreadSchedulerTaskClass),
NULL,
NULL,
gst_thread_scheduler_task_class_init,
NULL,
NULL,
sizeof (GstThreadSchedulerTask),
0,
(GInstanceInitFunc) gst_thread_scheduler_task_init
};
object_type =
g_type_register_static (GST_TYPE_TASK,
"GstThreadSchedulerTask", &object_info, 0);
}
return object_type;
}
static void
gst_thread_scheduler_task_class_init (gpointer klass, gpointer class_data)
{
GstTaskClass *task = GST_TASK_CLASS (klass);
task->start = gst_thread_scheduler_task_start;
task->stop = gst_thread_scheduler_task_stop;
task->pause = gst_thread_scheduler_task_pause;
}
static void
gst_thread_scheduler_task_init (GstThreadSchedulerTask * task)
{
GST_TASK (task)->state = GST_TASK_STOPPED;
}
static gboolean
gst_thread_scheduler_task_start (GstTask * task)
{
GstThreadSchedulerTask *ttask = GST_THREAD_SCHEDULER_TASK (task);
GstThreadScheduler *tsched =
GST_THREAD_SCHEDULER (GST_OBJECT_PARENT (GST_OBJECT (task)));
GstTaskState old;
GStaticRecMutex *lock;
GST_DEBUG_OBJECT (task, "Starting task %p", task);
if ((lock = GST_TASK_GET_LOCK (task)) == NULL) {
lock = g_new (GStaticRecMutex, 1);
g_static_rec_mutex_init (lock);
GST_TASK_GET_LOCK (task) = lock;
}
GST_LOCK (ttask);
old = GST_TASK_CAST (ttask)->state;
GST_TASK_CAST (ttask)->state = GST_TASK_STARTED;
switch (old) {
case GST_TASK_STOPPED:
g_thread_pool_push (tsched->pool, task, NULL);
break;
case GST_TASK_PAUSED:
GST_TASK_SIGNAL (ttask);
break;
case GST_TASK_STARTED:
break;
}
GST_UNLOCK (ttask);
return TRUE;
}
static gboolean
gst_thread_scheduler_task_stop (GstTask * task)
{
GstThreadSchedulerTask *ttask = GST_THREAD_SCHEDULER_TASK (task);
GstTaskState old;
GST_DEBUG_OBJECT (task, "Stopping task %p", task);
GST_LOCK (ttask);
old = GST_TASK_CAST (ttask)->state;
GST_TASK_CAST (ttask)->state = GST_TASK_STOPPED;
switch (old) {
case GST_TASK_STOPPED:
break;
case GST_TASK_PAUSED:
GST_TASK_SIGNAL (ttask);
break;
case GST_TASK_STARTED:
break;
}
GST_UNLOCK (ttask);
return TRUE;
}
static gboolean
gst_thread_scheduler_task_pause (GstTask * task)
{
GstThreadSchedulerTask *ttask = GST_THREAD_SCHEDULER_TASK (task);
GstThreadScheduler *tsched =
GST_THREAD_SCHEDULER (GST_OBJECT_PARENT (GST_OBJECT (task)));
GstTaskState old;
GST_DEBUG_OBJECT (task, "Pausing task %p", task);
GST_LOCK (ttask);
old = GST_TASK_CAST (ttask)->state;
GST_TASK_CAST (ttask)->state = GST_TASK_PAUSED;
switch (old) {
case GST_TASK_STOPPED:
g_thread_pool_push (tsched->pool, task, NULL);
break;
case GST_TASK_PAUSED:
break;
case GST_TASK_STARTED:
break;
}
GST_UNLOCK (ttask);
return TRUE;
}
static void gst_thread_scheduler_class_init (gpointer g_class, gpointer data);
static void gst_thread_scheduler_init (GstThreadScheduler * object);
GType
gst_thread_scheduler_get_type (void)
{
static GType object_type = 0;
if (object_type == 0) {
static const GTypeInfo object_info = {
sizeof (GstThreadSchedulerClass),
NULL,
NULL,
gst_thread_scheduler_class_init,
NULL,
NULL,
sizeof (GstThreadScheduler),
0,
(GInstanceInitFunc) gst_thread_scheduler_init
};
object_type =
g_type_register_static (GST_TYPE_SCHEDULER,
"GstThreadScheduler", &object_info, 0);
}
return object_type;
}
static void gst_thread_scheduler_setup (GstScheduler * sched);
static void gst_thread_scheduler_reset (GstScheduler * sched);
static GstTask *gst_thread_scheduler_create_task (GstScheduler * sched,
GstTaskFunction func, gpointer data);
static void
gst_thread_scheduler_class_init (gpointer klass, gpointer class_data)
{
GstSchedulerClass *scheduler = GST_SCHEDULER_CLASS (klass);
scheduler->setup = gst_thread_scheduler_setup;
scheduler->reset = gst_thread_scheduler_reset;
scheduler->create_task = gst_thread_scheduler_create_task;
}
static void
gst_thread_scheduler_func (GstThreadSchedulerTask * ttask,
GstThreadScheduler * sched)
{
GstTask *task = GST_TASK (ttask);
gst_object_ref (GST_OBJECT (task));
GST_DEBUG_OBJECT (sched, "Entering task %p, thread %p", task,
g_thread_self ());
/* locking order is TASK_LOCK, LOCK */
GST_TASK_LOCK (task);
GST_LOCK (task);
while (G_LIKELY (task->state != GST_TASK_STOPPED)) {
while (G_UNLIKELY (task->state == GST_TASK_PAUSED)) {
GST_TASK_UNLOCK (task);
GST_TASK_SIGNAL (task);
GST_TASK_WAIT (task);
GST_UNLOCK (task);
/* locking order.. */
GST_TASK_LOCK (task);
GST_LOCK (task);
if (task->state == GST_TASK_STOPPED)
goto done;
}
GST_UNLOCK (task);
task->func (task->data);
GST_LOCK (task);
}
done:
GST_UNLOCK (task);
GST_TASK_UNLOCK (task);
GST_DEBUG_OBJECT (sched, "Exit task %p, thread %p", task, g_thread_self ());
gst_object_unref (GST_OBJECT (task));
}
static void
gst_thread_scheduler_init (GstThreadScheduler * scheduler)
{
scheduler->pool = g_thread_pool_new (
(GFunc) gst_thread_scheduler_func, scheduler, -1, FALSE, NULL);
}
static GstTask *
gst_thread_scheduler_create_task (GstScheduler * sched, GstTaskFunction func,
gpointer data)
{
GstThreadSchedulerTask *task;
task =
GST_THREAD_SCHEDULER_TASK (g_object_new (GST_TYPE_THREAD_SCHEDULER_TASK,
NULL));
gst_object_set_parent (GST_OBJECT (task), GST_OBJECT (sched));
GST_TASK_CAST (task)->func = func;
GST_TASK_CAST (task)->data = data;
GST_DEBUG_OBJECT (sched, "Created task %p", task);
return GST_TASK_CAST (task);
}
static void
gst_thread_scheduler_setup (GstScheduler * sched)
{
}
static void
gst_thread_scheduler_reset (GstScheduler * sched)
{
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GstSchedulerFactory *factory;
GST_DEBUG_CATEGORY_INIT (debug_scheduler, "thread", 0, "thread scheduler");
factory = gst_scheduler_factory_new ("thread",
"A scheduler using threads", GST_TYPE_THREAD_SCHEDULER);
if (factory == NULL)
return FALSE;
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "gstthreadscheduler",
"a thread scheduler", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE,
GST_ORIGIN)