misc

Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 96 insertions, 0 deletions

diff --git a/src/mds-registry/signals.c b/src/mds-registry/signals.c
new file mode 100644
index 0000000..7d1f5b4
--- /dev/null
+++ b/src/mds-registry/signals.c
@@ -0,0 +1,96 @@
+/**
+ * mds — A micro-display server
+ * Copyright © 2014  Mattias Andrée (maandree@member.fsf.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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+#include "signals.h"
+
+#include "globals.h"
+#include "slave.h"
+
+#include "../mds-base.h"
+
+#include <libmdsserver/linked-list.h>
+#include <libmdsserver/macros.h>
+
+#include <stdio.h>
+#include <pthread.h>
+#include <errno.h>
+
+
+
+/**
+ * Send a singal to all threads except the current thread
+ * 
+ * @param  signo  The signal
+ */
+static void signal_all(int signo)
+{      
+  pthread_t current_thread;
+  ssize_t node;
+  
+  current_thread = pthread_self();
+  
+  if (pthread_equal(current_thread, master_thread) == 0)
+    pthread_kill(master_thread, signo);
+  
+  with_mutex (slave_mutex,
+	      foreach_linked_list_node (slave_list, node)
+	        {
+		  slave_t* value = (slave_t*)(void*)(slave_list.values[node]);
+		  if (pthread_equal(current_thread, value->thread) == 0)
+		    pthread_kill(value->thread, signo);
+		}
+	      );
+}
+
+
+/**
+ * This function is called when a signal that
+ * signals the server to re-exec has been received
+ * 
+ * When this function is invoked, it should set `reexecing` to a non-zero value
+ * 
+ * @param  signo  The signal that has been received
+ */
+void received_reexec(int signo)
+{
+  if (reexecing == 0)
+    {
+      terminating = reexecing = 1;
+      eprint("re-exec signal received.");
+      signal_all(signo);
+    }
+}
+
+
+/**
+ * This function is called when a signal that
+ * signals the server to re-exec has been received
+ * 
+ * When this function is invoked, it should set `terminating` to a non-zero value
+ * 
+ * @param  signo  The signal that has been received
+ */
+void received_terminate(int signo)
+{
+  if (terminating == 0)
+    {
+      terminating = 1;
+      eprint("terminate signal received.");
+      signal_all(signo);
+    }
+}
+