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/* syssignal.h - System-dependent definitions for signals.
Copyright (C) 1993, 1999, 2001-2023 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
#ifndef EMACS_SYSSIGNAL_H
#define EMACS_SYSSIGNAL_H
#include <signal.h>
#include <attribute.h>
extern void init_signals (void);
extern void block_child_signal (sigset_t *);
extern void unblock_child_signal (sigset_t const *);
extern void block_interrupt_signal (sigset_t *);
extern void restore_signal_mask (sigset_t const *);
extern void block_tty_out_signal (sigset_t *);
extern void unblock_tty_out_signal (sigset_t const *);
#ifdef HAVE_PTHREAD
#include <pthread.h>
/* If defined, asynchronous signals delivered to a non-main thread are
forwarded to the main thread. */
#define FORWARD_SIGNAL_TO_MAIN_THREAD
#endif
/* On Cygwin as of 2015-06-22 SIGEV_SIGNAL is defined as an enum
constant but not as a macro. */
#if defined CYGWIN && !defined SIGEV_SIGNAL
#define SIGEV_SIGNAL SIGEV_SIGNAL
#endif
#if defined HAVE_TIMER_SETTIME && defined SIGEV_SIGNAL
# define HAVE_ITIMERSPEC
#endif
#if (defined SIGPROF && !defined PROFILING \
&& (defined HAVE_SETITIMER || defined HAVE_ITIMERSPEC))
# define PROFILER_CPU_SUPPORT
#endif
extern sigset_t empty_mask;
typedef void (*signal_handler_t) (int);
extern void emacs_sigaction_init (struct sigaction *, signal_handler_t);
char const *safe_strsignal (int) ATTRIBUTE_CONST;
#if NSIG < NSIG_MINIMUM
# undef NSIG
# define NSIG NSIG_MINIMUM
#endif
#ifndef SA_SIGINFO
# define SA_SIGINFO 0
#endif
#ifndef emacs_raise
# define emacs_raise(sig) raise (sig)
#endif
#ifndef HAVE_STRSIGNAL
# define strsignal(sig) safe_strsignal (sig)
#endif
void deliver_process_signal (int, signal_handler_t);
#endif /* EMACS_SYSSIGNAL_H */
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