/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1991, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _SIGNAL_H_
#define _SIGNAL_H_

#include <sys/cdefs.h>
#include <sys/_types.h>
#include <sys/signal.h>
#if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
#include <machine/ucontext.h>
#include <sys/_ucontext.h>
#endif

#if __POSIX_VISIBLE >= 202405 || __BSD_VISIBLE
#define SIG2STR_MAX     32      /* size of buffer required for sig2str() */
#endif

__NULLABILITY_PRAGMA_PUSH

#if __BSD_VISIBLE
/*
 * XXX should enlarge these, if only to give empty names instead of bounds
 * errors for large signal numbers.
 */
extern const char * const sys_signame[NSIG];
extern const char * const sys_siglist[NSIG];
extern const int sys_nsig;
#endif

#if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE
#ifndef _PID_T_DECLARED
typedef __pid_t         pid_t;
#define _PID_T_DECLARED
#endif
#endif

#if __POSIX_VISIBLE || __XSI_VISIBLE
struct pthread;         /* XXX */
typedef struct pthread *__pthread_t;
#if !defined(_PTHREAD_T_DECLARED) && __POSIX_VISIBLE >= 200809
typedef __pthread_t pthread_t;
#define _PTHREAD_T_DECLARED
#endif
#endif /* __POSIX_VISIBLE || __XSI_VISIBLE */

#if !defined(_STANDALONE) && defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0
#include <ssp/signal.h>
#endif

__BEGIN_DECLS
int     raise(int);

#if __POSIX_VISIBLE || __XSI_VISIBLE
int     kill(__pid_t, int);
int     pthread_kill(__pthread_t, int);
int     pthread_sigmask(int, const __sigset_t * __restrict,
            __sigset_t * __restrict);
int     sigaction(int, const struct sigaction * __restrict,
            struct sigaction * __restrict);
int     sigaddset(sigset_t *, int);
int     sigdelset(sigset_t *, int);
int     sigemptyset(sigset_t *);
int     sigfillset(sigset_t *);
int     sigismember(const sigset_t *, int);
int     sigpending(sigset_t * _Nonnull);
int     sigprocmask(int, const sigset_t * __restrict, sigset_t * __restrict);
int     sigsuspend(const sigset_t * _Nonnull);
int     sigwait(const sigset_t * _Nonnull __restrict,
            int * _Nonnull __restrict);
#endif

#if __POSIX_VISIBLE >= 199506 || __XSI_VISIBLE >= 600
int     sigqueue(__pid_t, int, const union sigval);

struct timespec;
int     sigtimedwait(const sigset_t * __restrict, siginfo_t * __restrict,
            const struct timespec * __restrict);
int     sigwaitinfo(const sigset_t * __restrict, siginfo_t * __restrict);
#endif

#if __XSI_VISIBLE
int     killpg(__pid_t, int);
int     sigaltstack(const stack_t * __restrict, stack_t * __restrict); 
int     sighold(int);
int     sigignore(int);
int     sigpause(int);
int     sigrelse(int);
void    (* _Nullable sigset(int, void (* _Nullable)(int)))(int);
int     xsi_sigpause(int);
#endif

#if __XSI_VISIBLE >= 600
int     siginterrupt(int, int);
#endif

#if __POSIX_VISIBLE >= 200809
void    psiginfo(const siginfo_t *, const char *);
void    psignal(int, const char *);
#endif

#if __POSIX_VISIBLE >= 202405 || __BSD_VISIBLE
int sig2str(int, char *);
int str2sig(const char * __restrict, int * __restrict);
#endif

#if __BSD_VISIBLE
int     sigandset(sigset_t *dest, const sigset_t *left, const sigset_t *right);
int     sigblock(int);
int     sigisemptyset(const sigset_t *set);
int     sigorset(sigset_t *dest, const sigset_t *left, const sigset_t *right);
int     sigreturn(const struct __ucontext *);
int     sigsetmask(int);
int     sigstack(const struct sigstack *, struct sigstack *);
int     sigvec(int, struct sigvec *, struct sigvec *);
#endif
__END_DECLS
__NULLABILITY_PRAGMA_POP

#endif /* !_SIGNAL_H_ */