/* GStreamer

 * Copyright (C) 1999 Erik Walthinsen <omega@cse.ogi.edu>

 * Copyright (C) 2004 Wim Taymans <wim.taymans@gmail.com>

 * Copyright (C) 2007 Peter Kjellerstedt <pkj@axis.com>

 *

 * gstpoll.h: File descriptor set

 *

 * 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., 51 Franklin St, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 */

#ifndef __GST_POLL_H__

#define __GST_POLL_H__

#include <glib.h>

#include <glib-object.h>

#include <gst/gstclock.h>

G_BEGIN_DECLS

/**

 * GstPoll:

 *

 * A set of file/network descriptors.

 */

typedef struct _GstPoll GstPoll;

/**

 * GstPollFD:

 * @fd: a file descriptor

 *

 * A file descriptor object.

 */

typedef struct {

  int fd;

  /*< private >*/

  gint idx;

} GstPollFD;

/**

 * GST_POLL_FD_INIT:

 *

 * A #GstPollFD must be initialized with this macro, before it can be

 * used. This macro can used be to initialize a variable, but it cannot

 * be assigned to a variable. In that case you have to use

 * gst_poll_fd_init().

 */

#define GST_POLL_FD_INIT  { -1, -1 }

GST_API

GstPoll*        gst_poll_new              (gboolean controllable) G_GNUC_MALLOC;

GST_API

GstPoll*        gst_poll_new_timer        (void) G_GNUC_MALLOC;

GST_API

void            gst_poll_free             (GstPoll *set);

GST_API

void            gst_poll_get_read_gpollfd (GstPoll *set, GPollFD *fd);

GST_API

void            gst_poll_fd_init          (GstPollFD *fd);

GST_API

gboolean        gst_poll_add_fd           (GstPoll *set, GstPollFD *fd);

GST_API

gboolean        gst_poll_remove_fd        (GstPoll *set, GstPollFD *fd);

GST_API

gboolean        gst_poll_fd_ctl_write     (GstPoll *set, GstPollFD *fd, gboolean active);

GST_API

gboolean        gst_poll_fd_ctl_read      (GstPoll *set, GstPollFD *fd, gboolean active);

GST_API

void            gst_poll_fd_ignored       (GstPoll *set, GstPollFD *fd);

GST_API

gboolean        gst_poll_fd_has_closed    (const GstPoll *set, GstPollFD *fd);

GST_API

gboolean        gst_poll_fd_has_error     (const GstPoll *set, GstPollFD *fd);

GST_API

gboolean        gst_poll_fd_can_read      (const GstPoll *set, GstPollFD *fd);

GST_API

gboolean        gst_poll_fd_can_write     (const GstPoll *set, GstPollFD *fd);

GST_API

gint            gst_poll_wait             (GstPoll *set, GstClockTime timeout);

GST_API

gboolean        gst_poll_set_controllable (GstPoll *set, gboolean controllable);

GST_API

void            gst_poll_restart          (GstPoll *set);

GST_API

void            gst_poll_set_flushing     (GstPoll *set, gboolean flushing);

GST_API

gboolean        gst_poll_write_control    (GstPoll *set);

GST_API

gboolean        gst_poll_read_control     (GstPoll *set) G_GNUC_WARN_UNUSED_RESULT;

G_END_DECLS

#endif /* __GST_POLL_H__ */