apps/plugins/lib/pluginlib_exit.h

   1 /***************************************************************************
   2 *             __________               __   ___.
   3 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7 *                     \/            \/     \/    \/            \/
   8 * $Id$
   9 *
  10 * Copyright (C) 2009 by Maurus Cuelenaere
  11 *
  12 * This program is free software; you can redistribute it and/or
  13 * modify it under the terms of the GNU General Public License
  14 * as published by the Free Software Foundation; either version 2
  15 * of the License, or (at your option) any later version.
  16 *
  17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18 * KIND, either express or implied.
  19 *
  20 ****************************************************************************/
  21
  22 #ifndef __PLUGINLIB_EXIT_H__
  23 #define __PLUGINLIB_EXIT_H__
  24
  25 #include "config.h"
  26 #if (CONFIG_PLATFORM & PLATFORM_NATIVE)
  27 #include "../../codecs/lib/setjmp.h"
  28 #else
  29 #include <setjmp.h>
  30 #endif
  31
  32 #define _PLUGINLIB_EXIT_INIT(atexit) switch(setjmp(__exit_env))   \
  33                                      {                            \
  34                                          case 1:                  \
  35                                              atexit               \
  36                                              return PLUGIN_OK;    \
  37                                          case 2:                  \
  38                                              atexit               \
  39                                              return PLUGIN_ERROR; \
  40                                          case 0:                  \
  41                                          default:                 \
  42                                              break;               \
  43                                      }
  44
  45 /* Either PLUGINLIB_EXIT_INIT or PLUGINLIB_EXIT_INIT_ATEXIT needs to be placed
  46  * as the first line in plugin_start. The _ATEXIT version will call the named
  47  * no-argument function when exit() is called before exiting the plugin, to
  48  * allow for cleanup.
  49  */
  50 #define PLUGINLIB_EXIT_INIT _PLUGINLIB_EXIT_INIT()
  51 #define PLUGINLIB_EXIT_INIT_ATEXIT(atexit) _PLUGINLIB_EXIT_INIT(atexit();)
  52
  53 extern jmp_buf __exit_env;
  54 #define exit(status) longjmp(__exit_env, status != 0 ? 2 : 1)
  55
  56 #endif /*  __PLUGINLIB_EXIT_H__ */