1 /*****************************************************************************
2 * event.c: New libvlc event control API
3 *****************************************************************************
4 * Copyright (C) 2007-2010 VLC authors and VideoLAN
7 * Authors: Filippo Carone <filippo@carone.org>
8 * Pierre d'Herbemont <pdherbemont # videolan.org>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU Lesser General Public License as published by
12 * the Free Software Foundation; either version 2.1 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this program; if not, write to the Free Software Foundation,
22 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
32 #include <vlc/libvlc.h>
33 #include "libvlc_internal.h"
35 #include <vlc_common.h>
43 * struct libvlc_cool_object_t
46 * libvlc_event_manager_t event_manager;
50 * libvlc_my_cool_object_new()
53 * libvlc_event_manager_init(&p_self->event_manager, p_self)
57 * libvlc_my_cool_object_release()
60 * libvlc_event_manager_release(&p_self->event_manager);
64 * libvlc_my_cool_object_do_something()
67 * libvlc_event_t event;
68 * event.type = libvlc_MyCoolObjectDidSomething;
69 * event.u.my_cool_object_did_something.what_it_did = kSomething;
70 * libvlc_event_send(&p_self->event_manager, &event);
74 typedef struct libvlc_event_listener_t
76 libvlc_event_type_t event_type
;
78 libvlc_callback_t pf_callback
;
79 } libvlc_event_listener_t
;
82 * Internal libvlc functions
85 void libvlc_event_manager_init(libvlc_event_manager_t
*em
, void *obj
)
88 vlc_array_init(&em
->listeners
);
89 vlc_mutex_init_recursive(&em
->lock
);
92 void libvlc_event_manager_destroy(libvlc_event_manager_t
*em
)
94 vlc_mutex_destroy(&em
->lock
);
96 for (size_t i
= 0; i
< vlc_array_count(&em
->listeners
); i
++)
97 free(vlc_array_item_at_index(&em
->listeners
, i
));
99 vlc_array_clear(&em
->listeners
);
102 /**************************************************************************
103 * libvlc_event_send (internal) :
106 **************************************************************************/
107 void libvlc_event_send( libvlc_event_manager_t
* p_em
,
108 libvlc_event_t
* p_event
)
110 /* Fill event with the sending object now */
111 p_event
->p_obj
= p_em
->p_obj
;
113 vlc_mutex_lock(&p_em
->lock
);
114 for (size_t i
= 0; i
< vlc_array_count(&p_em
->listeners
); i
++)
116 libvlc_event_listener_t
*listener
;
118 listener
= vlc_array_item_at_index(&p_em
->listeners
, i
);
119 if (listener
->event_type
== p_event
->type
)
120 listener
->pf_callback(p_event
, listener
->p_user_data
);
122 vlc_mutex_unlock(&p_em
->lock
);
126 * Public libvlc functions
129 /**************************************************************************
130 * libvlc_event_attach (public) :
132 * Add a callback for an event.
133 **************************************************************************/
134 int libvlc_event_attach(libvlc_event_manager_t
*em
, libvlc_event_type_t type
,
135 libvlc_callback_t callback
, void *opaque
)
137 libvlc_event_listener_t
*listener
= malloc(sizeof (*listener
));
138 if (unlikely(listener
== NULL
))
141 listener
->event_type
= type
;
142 listener
->p_user_data
= opaque
;
143 listener
->pf_callback
= callback
;
146 vlc_mutex_lock(&em
->lock
);
147 if(vlc_array_append(&em
->listeners
, listener
) != 0)
149 i_ret
= VLC_EGENERIC
;
154 vlc_mutex_unlock(&em
->lock
);
158 /**************************************************************************
159 * libvlc_event_detach (public) :
161 * Remove a callback for an event.
162 **************************************************************************/
163 void libvlc_event_detach(libvlc_event_manager_t
*em
, libvlc_event_type_t type
,
164 libvlc_callback_t callback
, void *opaque
)
166 vlc_mutex_lock(&em
->lock
);
167 for (size_t i
= 0; i
< vlc_array_count(&em
->listeners
); i
++)
169 libvlc_event_listener_t
*listener
;
171 listener
= vlc_array_item_at_index(&em
->listeners
, i
);
173 if (listener
->event_type
== type
174 && listener
->pf_callback
== callback
175 && listener
->p_user_data
== opaque
)
176 { /* that's our listener */
177 vlc_array_remove(&em
->listeners
, i
);
178 vlc_mutex_unlock(&em
->lock
);