1 /*****************************************************************************
2 * interface.c: interface access for other threads
3 * This library provides basic functions for threads to interact with user
4 * interface, such as command line.
5 *****************************************************************************
6 * Copyright (C) 1998-2007 the VideoLAN team
9 * Authors: Vincent Seguin <seguin@via.ecp.fr>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
24 *****************************************************************************/
28 * This file contains functions related to interface management
32 /*****************************************************************************
34 *****************************************************************************/
41 #include <vlc_common.h>
42 #include <vlc_modules.h>
43 #include <vlc_interface.h>
46 /*****************************************************************************
48 *****************************************************************************/
49 static void* RunInterface( void * );
50 #if defined( __APPLE__)
51 static void * MonitorLibVLCDeath( vlc_object_t *p_this );
53 static int AddIntfCallback( vlc_object_t *, char const *,
54 vlc_value_t , vlc_value_t , void * );
56 static vlc_mutex_t lock = VLC_STATIC_MUTEX;
60 * Create and start an interface.
62 * @param p_this the calling vlc_object_t
63 * @param chain configuration chain string
64 * @return VLC_SUCCESS or an error code
66 int intf_Create( vlc_object_t *p_this, const char *chain )
68 libvlc_int_t *p_libvlc = p_this->p_libvlc;
69 intf_thread_t * p_intf;
71 /* Allocate structure */
72 p_intf = vlc_custom_create( p_libvlc, sizeof( *p_intf ), "interface" );
76 /* Variable used for interface spawning */
77 vlc_value_t val, text;
78 var_Create( p_intf, "intf-add", VLC_VAR_STRING |
79 VLC_VAR_HASCHOICE | VLC_VAR_ISCOMMAND );
80 text.psz_string = _("Add Interface");
81 var_Change( p_intf, "intf-add", VLC_VAR_SETTEXT, &text, NULL );
82 #if !defined(WIN32) && defined(HAVE_ISATTY)
86 val.psz_string = (char *)"rc";
87 text.psz_string = (char *)_("Console");
88 var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
90 val.psz_string = (char *)"telnet";
91 text.psz_string = (char *)_("Telnet");
92 var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
93 val.psz_string = (char *)"http";
94 text.psz_string = (char *)_("Web");
95 var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
96 val.psz_string = (char *)"logger";
97 text.psz_string = (char *)_("Debug logging");
98 var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
99 val.psz_string = (char *)"gestures";
100 text.psz_string = (char *)_("Mouse Gestures");
101 var_Change( p_intf, "intf-add", VLC_VAR_ADDCHOICE, &val, &text );
103 var_AddCallback( p_intf, "intf-add", AddIntfCallback, NULL );
105 /* Attach interface to LibVLC */
106 #if defined( __APPLE__ )
107 p_intf->b_should_run_on_first_thread = false;
110 /* Choose the best module */
111 p_intf->p_cfg = NULL;
112 char *psz_parser = *chain == '$'
113 ? var_CreateGetString(p_intf, chain+1)
116 char *psz_tmp = config_ChainCreate( &module, &p_intf->p_cfg,
120 p_intf->p_module = module_need( p_intf, "interface", module, true );
122 if( p_intf->p_module == NULL )
124 msg_Err( p_intf, "no suitable interface module" );
128 #if defined( __APPLE__ )
129 /* Hack to get Mac OS X Cocoa runtime running
130 * (it needs access to the main thread) */
131 if( p_intf->b_should_run_on_first_thread )
133 if( vlc_clone( &p_intf->thread,
134 MonitorLibVLCDeath, p_intf, VLC_THREAD_PRIORITY_LOW ) )
136 msg_Err( p_intf, "cannot spawn libvlc death monitoring thread" );
139 assert( p_intf->pf_run );
140 p_intf->pf_run( p_intf );
142 /* It is monitoring libvlc, not the p_intf */
143 vlc_object_kill( p_intf->p_libvlc );
145 vlc_join( p_intf->thread, NULL );
149 /* Run the interface in a separate thread */
151 && vlc_clone( &p_intf->thread,
152 RunInterface, p_intf, VLC_THREAD_PRIORITY_LOW ) )
154 msg_Err( p_intf, "cannot spawn interface thread" );
158 vlc_mutex_lock( &lock );
159 p_intf->p_next = libvlc_priv( p_libvlc )->p_intf;
160 libvlc_priv( p_libvlc )->p_intf = p_intf;
161 vlc_mutex_unlock( &lock );
166 if( p_intf->p_module )
167 module_unneed( p_intf, p_intf->p_module );
168 config_ChainDestroy( p_intf->p_cfg );
169 vlc_object_release( p_intf );
175 * Stops and destroys all interfaces
176 * @param p_libvlc the LibVLC instance
178 void intf_DestroyAll( libvlc_int_t *p_libvlc )
180 intf_thread_t *p_first;
182 vlc_mutex_lock( &lock );
183 p_first = libvlc_priv( p_libvlc )->p_intf;
185 libvlc_priv( p_libvlc )->p_intf = NULL;
187 vlc_mutex_unlock( &lock );
189 /* Tell the interfaces to die */
190 for( intf_thread_t *p_intf = p_first; p_intf; p_intf = p_intf->p_next )
191 vlc_object_kill( p_intf );
193 /* Cleanup the interfaces */
194 for( intf_thread_t *p_intf = p_first; p_intf != NULL; )
196 intf_thread_t *p_next = p_intf->p_next;
200 vlc_cancel( p_intf->thread );
201 vlc_join( p_intf->thread, NULL );
203 module_unneed( p_intf, p_intf->p_module );
204 config_ChainDestroy( p_intf->p_cfg );
205 vlc_object_release( p_intf );
211 /* Following functions are local */
214 * RunInterface: setups necessary data and give control to the interface
216 * @param p_this: interface object
218 static void* RunInterface( void *p_this )
220 intf_thread_t *p_intf = p_this;
222 p_intf->pf_run( p_intf );
226 #if defined( __APPLE__ )
227 #include "control/libvlc_internal.h" /* libvlc_InternalWait */
229 * MonitorLibVLCDeath: Used when b_should_run_on_first_thread is set.
231 * @param p_this: the interface object
233 static void * MonitorLibVLCDeath( vlc_object_t * p_this )
235 intf_thread_t *p_intf = (intf_thread_t *)p_this;
236 libvlc_int_t * p_libvlc = p_intf->p_libvlc;
237 int canc = vlc_savecancel ();
239 libvlc_InternalWait( p_libvlc );
241 vlc_object_kill( p_intf ); /* Kill the stupid first thread interface */
242 vlc_restorecancel (canc);
247 static int AddIntfCallback( vlc_object_t *p_this, char const *psz_cmd,
248 vlc_value_t oldval, vlc_value_t newval, void *p_data )
250 (void)psz_cmd; (void)oldval; (void)p_data;
253 /* Try to create the interface */
254 if( asprintf( &psz_intf, "%s,none", newval.psz_string ) == -1 )
257 int ret = intf_Create( VLC_OBJECT(p_this->p_libvlc), psz_intf );
260 msg_Err( p_this, "interface \"%s\" initialization failed",