lib/sigevent.h

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Quagga Signal handling header.
   4  *
   5  * Copyright (C) 2004 Paul Jakma.
   6  */
   7
   8 #ifndef _FRR_SIGNAL_H
   9 #define _FRR_SIGNAL_H
  10
  11 #include <frrevent.h>
  12
  13 #ifdef __cplusplus
  14 extern "C" {
  15 #endif
  16
  17 #define FRR_SIGNAL_TIMER_INTERVAL 2L
  18
  19 struct frr_signal_t {
  20         int signal;         /* signal number    */
  21         void (*handler)(void); /* handler to call  */
  22
  23         volatile sig_atomic_t caught; /* private member   */
  24 };
  25
  26 /* initialise sigevent system
  27  * takes:
  28  * - pointer to valid struct event_loop
  29  * - number of elements in passed in signals array
  30  * - array of frr_signal_t's describing signals to handle
  31  *   and handlers to use for each signal
  32  */
  33 extern void signal_init(struct event_loop *m, int sigc,
  34                         struct frr_signal_t *signals);
  35
  36
  37 /*
  38  * Check whether any signals have been received and are pending. This is done
  39  * with the application's key signals blocked. The complete set of signals
  40  * is returned in 'setp', so the caller can restore them when appropriate.
  41  * If there are pending signals, returns 'true', 'false' otherwise.
  42  */
  43 bool frr_sigevent_check(sigset_t *setp);
  44
  45 /* check whether there are signals to handle, process any found */
  46 extern int frr_sigevent_process(void);
  47
  48 #ifdef __cplusplus
  49 }
  50 #endif
  51
  52 #endif /* _FRR_SIGNAL_H */