+
+/*
+ * CINELERRA
+ * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
+ *
+ * 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 02111-1307 USA
+ *
+ */
+
+#include "bcipc.h"
+#include "bcresources.h"
+#include "bcsignals.h"
+#include "sema.h"
+#include <signal.h>
+#include <stdlib.h>
+#include <sys/sem.h>
+#include <sys/msg.h>
+#include <sys/shm.h>
+
+
+
+
+
+static ArrayList<int> global_shmem_db;
+static ArrayList<int> global_sema_db;
+static ArrayList<int> global_msg_db;
+static Mutex global_ipc_lock;
+static int crashed = 0;
+
+// These must be atomic routines
+
+int bc_enter_id(ArrayList<int>* list, int id);
+int bc_remove_id(ArrayList<int>* list, int id);
+
+void bc_ipc_termination(int signum)
+{
+ global_ipc_lock.lock();
+
+
+ if(!crashed)
+ {
+
+#if 0
+ union semun arg;
+ int i;
+
+ if(global_shmem_db.total || global_sema_db.total || global_msg_db.total)
+ printf("Crash\n");
+ for(i = 0; i < global_shmem_db.total; i++)
+ {
+ if(!shmctl(global_shmem_db.values[i], IPC_RMID, NULL))
+ {
+ printf("Deleted shared memory %d\n", global_shmem_db.values[i]);
+ }
+ }
+
+ for(i = 0; i < global_sema_db.total; i++)
+ {
+ if(!semctl(global_sema_db.values[i], 0, IPC_RMID, arg))
+ {
+ printf("Deleted semaphore %d\n", global_sema_db.values[i]);
+ }
+ }
+
+ for(i = 0; i < global_msg_db.total; i++)
+ {
+ if(!msgctl(global_msg_db.values[i], IPC_RMID, NULL))
+ {
+ printf("Deleted message %d\n", global_msg_db.values[i]);
+ }
+ }
+
+ global_shmem_db.remove_all();
+ global_sema_db.remove_all();
+ global_msg_db.remove_all();
+
+
+
+#endif
+
+
+// dispatch user specified signal handler
+ if(BC_Resources::signal_handler)
+ BC_Resources::signal_handler->signal_handler(signum);
+ crashed = 1;
+ }
+ global_ipc_lock.unlock();
+ exit(0);
+}
+
+int bc_init_ipc()
+{
+ if(signal(SIGSEGV, bc_ipc_termination) == SIG_IGN)
+ signal(SIGSEGV, SIG_IGN);
+ if(signal(SIGBUS, bc_ipc_termination) == SIG_IGN)
+ signal(SIGBUS, SIG_IGN);
+ // SIGKILL can't be ignored
+ // if(signal(SIGKILL, bc_ipc_termination) == SIG_IGN)
+ // signal(SIGKILL, SIG_IGN);
+ if(signal(SIGINT, bc_ipc_termination) == SIG_IGN)
+ signal(SIGINT, SIG_IGN);
+ if(signal(SIGHUP, bc_ipc_termination) == SIG_IGN)
+ signal(SIGHUP, SIG_IGN);
+ if(signal(SIGTERM, bc_ipc_termination) == SIG_IGN)
+ signal(SIGTERM, SIG_IGN);
+ return 0;
+}
+
+
+int bc_enter_shmem_id(int id)
+{
+ return bc_enter_id(&global_shmem_db, id);
+}
+
+int bc_remove_shmem_id(int id)
+{
+ return bc_remove_id(&global_shmem_db, id);
+}
+
+int bc_enter_sema_id(int id)
+{
+ return bc_enter_id(&global_sema_db, id);
+}
+
+int bc_remove_sema_id(int id)
+{
+ return bc_remove_id(&global_sema_db, id);
+}
+
+int bc_enter_msg_id(int id)
+{
+ return bc_enter_id(&global_msg_db, id);
+}
+
+int bc_remove_msg_id(int id)
+{
+ return bc_remove_id(&global_msg_db, id);
+}
+
+int bc_enter_id(ArrayList<int>* list, int id)
+{
+ int i, result = 0;
+ global_ipc_lock.lock();
+ for(i = 0; i < list->total; i++)
+ {
+ if(list->values[i] == id) result = 1;
+ }
+ if(!result) list->append(id);
+ global_ipc_lock.unlock();
+ return 0;
+}
+
+int bc_remove_id(ArrayList<int>* list, int id)
+{
+ int i;
+ global_ipc_lock.lock();
+ for(i = 0; i < list->total; i++)
+ {
+ if(list->values[i] == id) list->remove_number(i);
+ }
+ global_ipc_lock.unlock();
+ return 0;
+}
+