cinelerra-5.1/guicast/bcipc.C

   1
   2 /*
   3  * CINELERRA
   4  * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include "bcipc.h"
  23 #include "bcresources.h"
  24 #include "bcsignals.h"
  25 #include "sema.h"
  26 #include <signal.h>
  27 #include <stdlib.h>
  28 #include <sys/sem.h>
  29 #include <sys/msg.h>
  30 #include <sys/shm.h>
  31
  32
  33
  34
  35
  36 static ArrayList<int> global_shmem_db;
  37 static ArrayList<int> global_sema_db;
  38 static ArrayList<int> global_msg_db;
  39 static Mutex global_ipc_lock;
  40 static int crashed = 0;
  41
  42 // These must be atomic routines
  43
  44 int bc_enter_id(ArrayList<int>* list, int id);
  45 int bc_remove_id(ArrayList<int>* list, int id);
  46
  47 void bc_ipc_termination(int signum)
  48 {
  49         global_ipc_lock.lock();
  50
  51
  52         if(!crashed)
  53         {
  54
  55 #if 0
  56                 union semun arg;
  57                 int i;
  58
  59                 if(global_shmem_db.total || global_sema_db.total || global_msg_db.total)
  60                         printf("Crash\n");
  61                 for(i = 0; i < global_shmem_db.total; i++)
  62                 {
  63                         if(!shmctl(global_shmem_db.values[i], IPC_RMID, NULL))
  64                         {
  65                                 printf("Deleted shared memory %d\n", global_shmem_db.values[i]);
  66                         }
  67                 }
  68
  69                 for(i = 0; i < global_sema_db.total; i++)
  70                 {
  71                         if(!semctl(global_sema_db.values[i], 0, IPC_RMID, arg))
  72                         {
  73                                 printf("Deleted semaphore %d\n", global_sema_db.values[i]);
  74                         }
  75                 }
  76
  77                 for(i = 0; i < global_msg_db.total; i++)
  78                 {
  79                         if(!msgctl(global_msg_db.values[i], IPC_RMID, NULL))
  80                         {
  81                                 printf("Deleted message %d\n", global_msg_db.values[i]);
  82                         }
  83                 }
  84
  85                 global_shmem_db.remove_all();
  86                 global_sema_db.remove_all();
  87                 global_msg_db.remove_all();
  88
  89
  90
  91 #endif
  92
  93
  94 // dispatch user specified signal handler
  95                 if(BC_Resources::signal_handler)
  96                         BC_Resources::signal_handler->signal_handler(signum);
  97                 crashed = 1;
  98         }
  99         global_ipc_lock.unlock();
 100         exit(0);
 101 }
 102
 103 int bc_init_ipc()
 104 {
 105         if(signal(SIGSEGV, bc_ipc_termination) == SIG_IGN)
 106                 signal(SIGSEGV, SIG_IGN);
 107         if(signal(SIGBUS, bc_ipc_termination) == SIG_IGN)
 108                 signal(SIGBUS, SIG_IGN);
 109         //      SIGKILL can't be ignored
 110         //      if(signal(SIGKILL, bc_ipc_termination) == SIG_IGN)
 111         //              signal(SIGKILL, SIG_IGN);
 112         if(signal(SIGINT, bc_ipc_termination) == SIG_IGN)
 113                 signal(SIGINT, SIG_IGN);
 114         if(signal(SIGHUP, bc_ipc_termination) == SIG_IGN)
 115                 signal(SIGHUP, SIG_IGN);
 116         if(signal(SIGTERM, bc_ipc_termination) == SIG_IGN)
 117                 signal(SIGTERM, SIG_IGN);
 118         return 0;
 119 }
 120
 121
 122 int bc_enter_shmem_id(int id)
 123 {
 124         return bc_enter_id(&global_shmem_db, id);
 125 }
 126
 127 int bc_remove_shmem_id(int id)
 128 {
 129         return bc_remove_id(&global_shmem_db, id);
 130 }
 131
 132 int bc_enter_sema_id(int id)
 133 {
 134         return bc_enter_id(&global_sema_db, id);
 135 }
 136
 137 int bc_remove_sema_id(int id)
 138 {
 139         return bc_remove_id(&global_sema_db, id);
 140 }
 141
 142 int bc_enter_msg_id(int id)
 143 {
 144         return bc_enter_id(&global_msg_db, id);
 145 }
 146
 147 int bc_remove_msg_id(int id)
 148 {
 149         return bc_remove_id(&global_msg_db, id);
 150 }
 151
 152 int bc_enter_id(ArrayList<int>* list, int id)
 153 {
 154         int i, result = 0;
 155         global_ipc_lock.lock();
 156         for(i = 0; i < list->total; i++)
 157         {
 158                 if(list->values[i] == id) result = 1;
 159         }
 160         if(!result) list->append(id);
 161         global_ipc_lock.unlock();
 162         return 0;
 163 }
 164
 165 int bc_remove_id(ArrayList<int>* list, int id)
 166 {
 167         int i;
 168         global_ipc_lock.lock();
 169         for(i = 0; i < list->total; i++)
 170         {
 171                 if(list->values[i] == id) list->remove_number(i);
 172         }
 173         global_ipc_lock.unlock();
 174         return 0;
 175 }
 176