/*
 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
 */

#pragma once

#include <signal_numbers.h>
#include <sys/types.h>

__BEGIN_DECLS

typedef void (*__sighandler_t)(int);
typedef __sighandler_t sighandler_t;

typedef uint32_t sigset_t;
typedef uint32_t sig_atomic_t;

union sigval {
    int sival_int;
    void* sival_ptr;
};

typedef struct siginfo {
    int si_signo;
    int si_code;
    pid_t si_pid;
    uid_t si_uid;
    void* si_addr;
    int si_status;
    union sigval si_value;
} siginfo_t;

struct sigaction {
    union {
        void (*sa_handler)(int);
        void (*sa_sigaction)(int, siginfo_t*, void*);
    };
    sigset_t sa_mask;
    int sa_flags;
};

int kill(pid_t, int sig);
int killpg(int pgrp, int sig);
sighandler_t signal(int sig, sighandler_t);
int pthread_sigmask(int how, const sigset_t *set, sigset_t *ol_dset);
int sigaction(int sig, const struct sigaction* act, struct sigaction* old_act);
int sigemptyset(sigset_t*);
int sigfillset(sigset_t*);
int sigaddset(sigset_t*, int sig);
int sigdelset(sigset_t*, int sig);
int sigismember(const sigset_t*, int sig);
int sigprocmask(int how, const sigset_t* set, sigset_t* old_set);
int sigpending(sigset_t*);
int sigsuspend(const sigset_t*);
int raise(int sig);

extern const char* sys_siglist[NSIG];

#define SIG_DFL ((__sighandler_t)0)
#define SIG_ERR ((__sighandler_t)-1)
#define SIG_IGN ((__sighandler_t)1)

#define SA_NOCLDSTOP 1
#define SA_NOCLDWAIT 2
#define SA_SIGINFO 4
#define SA_ONSTACK 0x08000000
#define SA_RESTART 0x10000000
#define SA_NODEFER 0x40000000
#define SA_RESETHAND 0x80000000

#define SA_NOMASK SA_NODEFER
#define SA_ONESHOT SA_RESETHAND

#define SIG_BLOCK 0
#define SIG_UNBLOCK 1
#define SIG_SETMASK 2

#define CLD_EXITED 0
#define CLD_KILLED 1
#define CLD_DUMPED 2
#define CLD_TRAPPED 3
#define CLD_STOPPED 4
#define CLD_CONTINUED 5

__END_DECLS