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976c5cc134
Add an api that blocks application-handled signals (SIGINT, SIGTERM, e.g.) then tests whether any signals have been received. This helps to manage a race between signal reception and the poll call in the main event loop. Signed-off-by: Mark Stapp <mjs@voltanet.io>
68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
/*
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* Quagga Signal handling header.
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*
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* Copyright (C) 2004 Paul Jakma.
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*
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* This file is part of Quagga.
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*
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* Quagga is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* Quagga is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; see the file COPYING; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _QUAGGA_SIGNAL_H
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#define _QUAGGA_SIGNAL_H
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#include <thread.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define QUAGGA_SIGNAL_TIMER_INTERVAL 2L
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struct quagga_signal_t {
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int signal; /* signal number */
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void (*handler)(void); /* handler to call */
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volatile sig_atomic_t caught; /* private member */
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};
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/* initialise sigevent system
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* takes:
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* - pointer to valid struct thread_master
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* - number of elements in passed in signals array
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* - array of quagga_signal_t's describing signals to handle
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* and handlers to use for each signal
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*/
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extern void signal_init(struct thread_master *m, int sigc,
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struct quagga_signal_t *signals);
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/*
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* Check whether any signals have been received and are pending. This is done
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* with the application's key signals blocked. The complete set of signals
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* is returned in 'setp', so the caller can restore them when appropriate.
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* If there are pending signals, returns 'true', 'false' otherwise.
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*/
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bool frr_sigevent_check(sigset_t *setp);
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/* check whether there are signals to handle, process any found */
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extern int quagga_sigevent_process(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _QUAGGA_SIGNAL_H */
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