+/*****************************************************************************
+ * gtk_main.c : Gtk+ wrapper for gtk_main
+ *****************************************************************************
+ * Copyright (C) 2002 VideoLAN
+ * $Id: gtk_main.c,v 1.1 2002/08/20 18:08:51 sam Exp $
+ *
+ * Authors: Samuel Hocevar <sam@zoy.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#include <vlc/vlc.h>
+
+#include <stdlib.h> /* atexit() */
+
+#include <gtk/gtk.h>
+
+#ifdef HAVE_GNOME_H
+# include <gnome.h>
+#endif
+
+/*****************************************************************************
+ * Local prototypes.
+ *****************************************************************************/
+static int Open ( vlc_object_t * );
+static void Close ( vlc_object_t * );
+
+static void GtkMain ( vlc_object_t * );
+
+/*****************************************************************************
+ * The gtk_main_t object.
+ *****************************************************************************/
+#define MAX_ATEXIT 10
+
+typedef struct gtk_main_t
+{
+ VLC_COMMON_MEMBERS
+
+ /* XXX: Ugly kludge, see g_atexit */
+ void ( *pf_callback[MAX_ATEXIT] ) ( void );
+
+} gtk_main_t;
+
+/*****************************************************************************
+ * Local variables (mutex-protected).
+ *****************************************************************************/
+static void ** pp_global_data = NULL;
+static int i_refcount = 0;
+static gtk_main_t * p_gtk_main = NULL;
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+vlc_module_begin();
+ pp_global_data = p_module->p_vlc->pp_global_data;
+ set_description( _("Gtk+ helper module") );
+ set_capability( "gtk_main", 100 );
+ add_shortcut( "gtk" );
+#ifdef HAVE_GNOME_H
+ add_shortcut( "gnome" );
+#endif
+ set_callbacks( Open, Close );
+vlc_module_end();
+
+/*****************************************************************************
+ * g_atexit: kludge to avoid the Gtk+ thread to segfault at exit
+ *****************************************************************************
+ * gtk_init() makes several calls to g_atexit() which calls atexit() to
+ * register tidying callbacks to be called at program exit. Since the Gtk+
+ * plugin is likely to be unloaded at program exit, we have to export this
+ * symbol to intercept the g_atexit() calls. Talk about crude hack.
+ *****************************************************************************/
+void g_atexit( GVoidFunc func )
+{
+ gtk_main_t *p_this;
+
+ int i_dummy;
+
+ if( pp_global_data == NULL )
+ {
+ atexit( func );
+ return;
+ }
+
+ p_this = (gtk_main_t *)*pp_global_data;
+ if( p_this == NULL )
+ {
+ /* Looks like this atexit() call wasn't for us. */
+ return;
+ }
+
+ for( i_dummy = 0;
+ i_dummy < MAX_ATEXIT && p_this->pf_callback[i_dummy] != NULL;
+ i_dummy++ )
+ {
+ ;
+ }
+
+ if( i_dummy >= MAX_ATEXIT - 1 )
+ {
+ msg_Err( p_this, "too many atexit() callbacks to register" );
+ return;
+ }
+
+ p_this->pf_callback[i_dummy] = func;
+ p_this->pf_callback[i_dummy + 1] = NULL;
+}
+
+/*****************************************************************************
+ * Open: initialize and create window
+ *****************************************************************************/
+static int Open( vlc_object_t *p_this )
+{
+ /* Initialize Gtk+ */
+
+ vlc_mutex_lock( p_this->p_vlc->p_global_lock );
+
+ if( i_refcount > 0 )
+ {
+ i_refcount++;
+ vlc_mutex_unlock( p_this->p_vlc->p_global_lock );
+
+ return VLC_SUCCESS;
+ }
+
+ p_gtk_main = vlc_object_create( p_this, sizeof(gtk_main_t) );
+ p_gtk_main->pf_callback[0] = NULL;
+
+ /* Only initialize gthreads if it's the first time we do it */
+ if( !g_thread_supported() )
+ {
+ g_thread_init( NULL );
+ }
+
+ /* Launch the gtk_main() thread. It will not return until it has
+ * called gdk_threads_enter(), which ensures us thread safety. */
+ if( vlc_thread_create( p_gtk_main, "gtk_main", GtkMain, VLC_TRUE ) )
+ {
+ vlc_object_destroy( p_gtk_main );
+ i_refcount--;
+ vlc_mutex_unlock( p_this->p_vlc->p_global_lock );
+ return VLC_ETHREAD;
+ }
+
+ i_refcount++;
+ vlc_mutex_unlock( p_this->p_vlc->p_global_lock );
+
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * Close: destroy interface window
+ *****************************************************************************/
+static void Close( vlc_object_t *p_this )
+{
+ int i_dummy;
+
+ vlc_mutex_lock( p_this->p_vlc->p_global_lock );
+
+ i_refcount--;
+
+ if( i_refcount > 0 )
+ {
+ vlc_mutex_unlock( p_this->p_vlc->p_global_lock );
+ return;
+ }
+
+ gtk_main_quit();
+ vlc_thread_join( p_gtk_main );
+
+ /* Launch stored callbacks */
+ for( i_dummy = 0;
+ i_dummy < MAX_ATEXIT && p_gtk_main->pf_callback[i_dummy] != NULL;
+ i_dummy++ )
+ {
+ p_gtk_main->pf_callback[i_dummy]();
+ }
+
+ vlc_object_destroy( p_gtk_main );
+ p_gtk_main = NULL;
+
+ vlc_mutex_unlock( p_this->p_vlc->p_global_lock );
+}
+
+static gint foo(gpointer foo)
+{
+ return TRUE;
+}
+
+/*****************************************************************************
+ * GtkMain: Gtk+ thread
+ *****************************************************************************
+ * this part of the interface is in a separate thread so that we can call
+ * gtk_main() from within it without annoying the rest of the program.
+ *****************************************************************************/
+static void GtkMain( vlc_object_t *p_this )
+{
+ /* gtk_init needs to know the command line. We don't care, so we
+ * give it an empty one */
+ static char *p_args[] = { "" };
+ static char **pp_args = p_args;
+ static int i_args = 1;
+
+ /* gtk_init will register stuff with g_atexit, so we need to have
+ * the global lock if we want to be able to intercept the calls */
+ *p_this->p_vlc->pp_global_data = p_gtk_main;
+
+ /* FIXME: deprecated ? */
+ /* gdk_threads_init(); */
+
+#ifdef HAVE_GNOME_H
+ gnome_init( p_this->p_vlc->psz_object_name, VERSION, i_args, p_args );
+#else
+ gtk_set_locale();
+ gtk_init( &i_args, &pp_args );
+#endif
+
+ gdk_threads_enter();
+
+ vlc_thread_ready( p_this );
+
+ /* If we don't add this simple timeout, gtk_main remains stuck ... */
+ gtk_timeout_add( INTF_IDLE_SLEEP / 1000, foo, p_this );
+
+ /* Enter Gtk mode */
+ gtk_main();
+
+ gdk_threads_leave();
+}
+