signal handling interface

configure.ac

@@ -1320,6 +1320,7 @@ if test "${SYS}" != "mingw32" -a "${SYS}" != "mingwce"; then
     VLC_ADD_PLUGIN([screensaver])
     VLC_ADD_PLUGIN([motion])
     VLC_ADD_PLUGIN([dynamicoverlay])
+    VLC_ADD_PLUGIN([signals])
 elif test "${SYS}" != "mingwce"; then
     VLC_ADD_PLUGIN([ntservice])
     VLC_ADD_PLUGIN([access_smb])

modules/control/Modules.am

@@ -8,6 +8,7 @@ SOURCES_hotkeys = hotkeys.c
 SOURCES_lirc = lirc.c
 SOURCES_rc = rc.c
 SOURCES_dbus = dbus.c dbus.h
+SOURCES_signals = signals.c
 if HAVE_DARWIN
 motion_extra = unimotion.c unimotion.h
 else
@@ -17,4 +18,3 @@ SOURCES_motion = \
         motion.c \
         $(motion_extra) \
         $(NULL)
-

modules/control/signals.c

+/*****************************************************************************
+ * signals.c : signals handler module for vlc
+ *****************************************************************************
+ * Copyright (C) 2008 Rémi Denis-Courmont
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <pthread.h>
+#include <signal.h>
+#include <time.h>
+
+#include <vlc/vlc.h>
+#include <vlc_plugin.h>
+#include <vlc_interface.h>
+
+static int  Open (vlc_object_t *);
+static void Close (vlc_object_t *);
+static void Run (intf_thread_t *);
+static void *SigThread (void *);
+
+vlc_module_begin ();
+    set_shortname (N_("Signals"));
+    set_category (CAT_INTERFACE);
+    set_subcategory (SUBCAT_INTERFACE_CONTROL);
+    set_description (N_("POSIX signals handling interface"));
+    set_capability ("interface", 0);
+    set_callbacks (Open, Close);
+vlc_module_end ();
+
+struct intf_sys_t
+{
+    pthread_t       thread;
+    int             signum;
+};
+
+static int Open (vlc_object_t *obj)
+{
+    intf_thread_t *intf = (intf_thread_t *)obj;
+    intf_sys_t *p_sys = malloc (sizeof (*p_sys));
+
+    if (p_sys == NULL)
+        return VLC_ENOMEM;
+
+    p_sys->signum = 0;
+    intf->p_sys = p_sys;
+
+    if (pthread_create (&p_sys->thread, NULL, SigThread, obj))
+    {
+        free (p_sys);
+        intf->p_sys = NULL;
+        return VLC_ENOMEM;
+    }
+
+    intf->pf_run = Run;
+    return 0;
+}
+
+static void Close (vlc_object_t *obj)
+{
+    intf_thread_t *intf = (intf_thread_t *)obj;
+    intf_sys_t *p_sys = intf->p_sys;
+
+    pthread_cancel (p_sys->thread);
+    pthread_join (p_sys->thread, NULL);
+    free (p_sys);
+}
+
+static void *SigThread (void *data)
+{
+    intf_thread_t *obj = data;
+    intf_sys_t *p_sys = obj->p_sys;
+    sigset_t set;
+
+    sigemptyset (&set);
+    sigaddset (&set, SIGHUP);
+    sigaddset (&set, SIGINT);
+    sigaddset (&set, SIGQUIT);
+    sigaddset (&set, SIGTERM);
+
+    sigaddset (&set, SIGCHLD);
+
+    for (;;)
+    {
+        int signum;
+
+        sigwait (&set, &signum);
+
+        vlc_object_lock (obj);
+        p_sys->signum = signum;
+        vlc_object_signal_unlocked (obj);
+        vlc_object_unlock (obj);
+    }
+}
+
+static void Run (intf_thread_t *obj)
+{
+    intf_sys_t *p_sys = obj->p_sys;
+
+    vlc_object_lock (obj);
+    do
+    {
+        switch (p_sys->signum)
+        {
+            case SIGINT:
+            case SIGHUP:
+            case SIGTERM:
+            case SIGQUIT:
+                msg_Err (obj, "Caught %s signal, exiting...",
+                         strsignal (p_sys->signum));
+                goto out;
+        }
+    }
+    while (!vlc_object_wait (obj));
+
+out:
+    vlc_object_unlock (obj);
+    vlc_object_kill (obj->p_libvlc);
+}