lib/sigevent.h

   1 /*
   2  * Quagga Signal handling header.
   3  *
   4  * Copyright (C) 2004 Paul Jakma.
   5  *
   6  * This file is part of Quagga.
   7  *
   8  * Quagga is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2, or (at your option) any
  11  * later version.
  12  *
  13  * Quagga is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with Quagga; see the file COPYING.  If not, write to the Free
  20  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  21  * 02111-1307, USA.
  22  */
  23
  24 #ifndef _QUAGGA_SIGNAL_H
  25 #define _QUAGGA_SIGNAL_H
  26
  27 #include <thread.h>
  28
  29 #define QUAGGA_SIGNAL_TIMER_INTERVAL 2L
  30 #define Q_SIGC(sig) (sizeof(sig)/sizeof(sig[0]))
  31
  32 struct quagga_signal_t
  33 {
  34   int signal;                     /* signal number    */
  35   void (*handler) (void);         /* handler to call  */
  36
  37   volatile sig_atomic_t caught;   /* private member   */
  38 };
  39
  40 /* initialise sigevent system
  41  * takes:
  42  * - pointer to valid struct thread_master
  43  * - number of elements in passed in signals array
  44  * - array of quagga_signal_t's describing signals to handle
  45  *   and handlers to use for each signal
  46  */
  47 extern void signal_init (struct thread_master *m, int sigc,
  48                          struct quagga_signal_t *signals);
  49
  50 /* check whether there are signals to handle, process any found */
  51 extern int quagga_sigevent_process (void);
  52
  53 #endif /* _QUAGGA_SIGNAL_H */