--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gstreamer_core/gst/gsttask.h	Thu Dec 17 08:53:32 2009 +0200
@@ -0,0 +1,211 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *               <2005> Wim Taymans <wim@fluendo.com>
+ *
+ * gsttask.h: Streaming tasks
+ *
+ * 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.
+ */
+
+#ifndef __GST_TASK_H__
+#define __GST_TASK_H__
+
+#include <gst/gstobject.h>
+
+G_BEGIN_DECLS
+
+/**
+ * GstTaskFunction:
+ * @data: user data passed to the function
+ *
+ * A function that will repeadedly be called in the thread created by
+ * a GstTask. 
+ */
+typedef void         (*GstTaskFunction)          (void *data);
+
+/* --- standard type macros --- */
+#define GST_TYPE_TASK                 	(gst_task_get_type ())
+#define GST_TASK(task)                	(G_TYPE_CHECK_INSTANCE_CAST ((task), GST_TYPE_TASK, GstTask))
+#define GST_IS_TASK(task)             	(G_TYPE_CHECK_INSTANCE_TYPE ((task), GST_TYPE_TASK))
+#define GST_TASK_CLASS(tclass)         	(G_TYPE_CHECK_CLASS_CAST ((tclass), GST_TYPE_TASK, GstTaskClass))
+#define GST_IS_TASK_CLASS(tclass)      	(G_TYPE_CHECK_CLASS_TYPE ((tclass), GST_TYPE_TASK))
+#define GST_TASK_GET_CLASS(task)      	(G_TYPE_INSTANCE_GET_CLASS ((task), GST_TYPE_TASK, GstTaskClass))
+#define GST_TASK_CAST(task)            	((GstTask*)(task))
+
+typedef struct _GstTask GstTask;
+typedef struct _GstTaskClass GstTaskClass;
+
+/**
+ * GstTaskState:
+ * @GST_TASK_STARTED: the task is started and running
+ * @GST_TASK_STOPPED:  the task is stopped
+ * @GST_TASK_PAUSED: the task is paused
+ *
+ * The different states a task can be in
+ */
+typedef enum {
+  GST_TASK_STARTED,
+  GST_TASK_STOPPED,
+  GST_TASK_PAUSED
+} GstTaskState;
+
+/**
+ * GST_TASK_STATE:
+ * @task: Task to get the state of
+ *
+ * Get access to the state of the task.
+ */
+#define GST_TASK_STATE(task)		(GST_TASK_CAST(task)->state)
+
+/**
+ * GST_TASK_GET_COND:
+ * @task: Task to get the cond of
+ *
+ * Get access to the cond of the task.
+ */
+#define GST_TASK_GET_COND(task)		(GST_TASK_CAST(task)->cond)
+/**
+ * GST_TASK_WAIT:
+ * @task: Task to wait for
+ *
+ * Wait for the task cond to be signalled
+ */
+#define GST_TASK_WAIT(task)		g_cond_wait(GST_TASK_GET_COND (task), GST_OBJECT_GET_LOCK (task))
+/**
+ * GST_TASK_SIGNAL:
+ * @task: Task to signal
+ *
+ * Signal the task cond
+ */
+#define GST_TASK_SIGNAL(task)		g_cond_signal(GST_TASK_GET_COND (task))
+/**
+ * GST_TASK_BROADCAST:
+ * @task: Task to broadcast
+ *
+ * Send a broadcast signal to all waiting task conds
+ */
+#define GST_TASK_BROADCAST(task)	g_cond_breadcast(GST_TASK_GET_COND (task))
+
+/**
+ * GST_TASK_GET_LOCK:
+ * @task: Task to get the lock of
+ *
+ * Get access to the task lock.
+ */
+#define GST_TASK_GET_LOCK(task)		(GST_TASK_CAST(task)->lock)
+
+/**
+ * GstTask:
+ * @state: the state of the task
+ * @cond: used to pause/resume the task
+ * @lock: The lock taken when iterating the taskfunction
+ * @func: the function executed by this task
+ * @data: data passed to the task function
+ * @running: a flag indicating that the task is running.
+ *
+ * The #GstTask object.
+ */
+struct _GstTask {
+  GstObject      object;
+
+  /*< public >*/ /* with LOCK */
+  GstTaskState     state;
+  GCond 	  *cond;
+
+  GStaticRecMutex *lock;
+
+  GstTaskFunction  func;
+  gpointer 	   data;
+
+  gboolean	   running;
+
+  /*< private >*/
+  union {
+    struct {
+      /* thread this task is currently running in */
+      GThread  *thread;
+    } ABI;
+    /* adding + 0 to mark ABI change to be undone later */
+    gpointer _gst_reserved[GST_PADDING + 0];
+  } abidata;
+
+};
+
+struct _GstTaskClass {
+  GstObjectClass parent_class;
+
+  /*< private >*/
+  GThreadPool *pool;
+
+  /*< private >*/
+  gpointer _gst_reserved[GST_PADDING];
+};
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+
+void		gst_task_cleanup_all	(void);
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+
+GType           gst_task_get_type       (void);
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+
+GstTask*	gst_task_create		(GstTaskFunction func, gpointer data);
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+void		gst_task_set_lock	(GstTask *task, GStaticRecMutex *mutex);
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+
+GstTaskState	gst_task_get_state	(GstTask *task);
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+
+gboolean	gst_task_start		(GstTask *task);
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+gboolean	gst_task_stop		(GstTask *task);
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+gboolean	gst_task_pause		(GstTask *task);
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+
+gboolean	gst_task_join		(GstTask *task);
+
+G_END_DECLS
+
+#endif /* __GST_TASK_H__ */
+