Merge CV, ver=5.1; ops/methods from HV, and interface from CV where possible

[goodguy/history.git] / cinelerra-5.1 / guicast / bcipc.C

diff --git a/cinelerra-5.1/guicast/bcipc.C b/cinelerra-5.1/guicast/bcipc.C
new file mode 100644 (file)
index 0000000..c740d50
--- /dev/null
+++ b/cinelerra-5.1/guicast/bcipc.C
@@ -0,0 +1,176 @@
+
+/*
+ * 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;
+}
+