#pragma once

#ifdef __cplusplus
extern "C" {
#endif

#include <features.h>

#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \
    defined(_GNU_SOURCE) || defined(_BSD_SOURCE)

#ifdef _GNU_SOURCE
#define __ucontext ucontext
#endif

#define __NEED_size_t
#define __NEED_pid_t
#define __NEED_uid_t
#define __NEED_struct_timespec
#define __NEED_pthread_t
#define __NEED_pthread_attr_t
#define __NEED_time_t
#define __NEED_clock_t
#define __NEED_sigset_t

#include <bits/alltypes.h>

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

#define SI_ASYNCNL (-60)
#define SI_TKILL (-6)
#define SI_SIGIO (-5)
#define SI_ASYNCIO (-4)
#define SI_MESGQ (-3)
#define SI_TIMER (-2)
#define SI_QUEUE (-1)
#define SI_USER 0
#define SI_KERNEL 128

typedef struct sigaltstack stack_t;

#endif

#include <bits/signal.h>

#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \
    defined(_GNU_SOURCE) || defined(_BSD_SOURCE)

#define SIG_HOLD ((void (*)(int))2)

#define FPE_INTDIV 1
#define FPE_INTOVF 2
#define FPE_FLTDIV 3
#define FPE_FLTOVF 4
#define FPE_FLTUND 5
#define FPE_FLTRES 6
#define FPE_FLTINV 7
#define FPE_FLTSUB 8

#define ILL_ILLOPC 1
#define ILL_ILLOPN 2
#define ILL_ILLADR 3
#define ILL_ILLTRP 4
#define ILL_PRVOPC 5
#define ILL_PRVREG 6
#define ILL_COPROC 7
#define ILL_BADSTK 8

#define SEGV_MAPERR 1
#define SEGV_ACCERR 2
#define SEGV_BNDERR 3

#define BUS_ADRALN 1
#define BUS_ADRERR 2
#define BUS_OBJERR 3
#define BUS_MCEERR_AR 4
#define BUS_MCEERR_AO 5

#define CLD_EXITED 1
#define CLD_KILLED 2
#define CLD_DUMPED 3
#define CLD_TRAPPED 4
#define CLD_STOPPED 5
#define CLD_CONTINUED 6

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

typedef struct {
#ifdef __SI_SWAP_ERRNO_CODE
    int si_signo, si_code, si_errno;
#else
    int si_signo, si_errno, si_code;
#endif
    union {
        char __pad[128 - 2 * sizeof(int) - sizeof(long)];
        struct {
            union {
                struct {
                    pid_t si_pid;
                    uid_t si_uid;
                } __piduid;
                struct {
                    int si_timerid;
                    int si_overrun;
                } __timer;
            } __first;
            union {
                union sigval si_value;
                struct {
                    int si_status;
                    clock_t si_utime, si_stime;
                } __sigchld;
            } __second;
        } __si_common;
        struct {
            void* si_addr;
            short si_addr_lsb;
            struct {
                void* si_lower;
                void* si_upper;
            } __addr_bnd;
        } __sigfault;
        struct {
            long si_band;
            int si_fd;
        } __sigpoll;
        struct {
            void* si_call_addr;
            int si_syscall;
            unsigned si_arch;
        } __sigsys;
    } __si_fields;
} siginfo_t;
#define si_pid __si_fields.__si_common.__first.__piduid.si_pid
#define si_uid __si_fields.__si_common.__first.__piduid.si_uid
#define si_status __si_fields.__si_common.__second.__sigchld.si_status
#define si_utime __si_fields.__si_common.__second.__sigchld.si_utime
#define si_stime __si_fields.__si_common.__second.__sigchld.si_stime
#define si_value __si_fields.__si_common.__second.si_value
#define si_addr __si_fields.__sigfault.si_addr
#define si_addr_lsb __si_fields.__sigfault.si_addr_lsb
#define si_lower __si_fields.__sigfault.__addr_bnd.si_lower
#define si_upper __si_fields.__sigfault.__addr_bnd.si_upper
#define si_band __si_fields.__sigpoll.si_band
#define si_fd __si_fields.__sigpoll.si_fd
#define si_timerid __si_fields.__si_common.__first.__timer.si_timerid
#define si_overrun __si_fields.__si_common.__first.__timer.si_overrun
#define si_ptr si_value.sival_ptr
#define si_int si_value.sival_int
#define si_call_addr __si_fields.__sigsys.si_call_addr
#define si_syscall __si_fields.__sigsys.si_syscall
#define si_arch __si_fields.__sigsys.si_arch

struct sigaction {
    union {
        void (*sa_handler)(int);
        void (*sa_sigaction)(int, siginfo_t*, void*);
    } __sa_handler;
    sigset_t sa_mask;
    int sa_flags;
    void (*sa_restorer)(void);
};
#define sa_handler __sa_handler.sa_handler
#define sa_sigaction __sa_handler.sa_sigaction

struct sigevent {
    union sigval sigev_value;
    int sigev_signo;
    int sigev_notify;
    void (*sigev_notify_function)(union sigval);
    pthread_attr_t* sigev_notify_attributes;
    char __pad[56 - 3 * sizeof(long)];
};

#define SIGEV_SIGNAL 0
#define SIGEV_NONE 1
#define SIGEV_THREAD 2

int __libc_current_sigrtmin(void);
int __libc_current_sigrtmax(void);

#define SIGRTMIN (__libc_current_sigrtmin())
#define SIGRTMAX (__libc_current_sigrtmax())

int kill(pid_t, int);

int sigemptyset(sigset_t*);
int sigfillset(sigset_t*);
int sigaddset(sigset_t*, int);
int sigdelset(sigset_t*, int);
int sigismember(const sigset_t*, int);

int sigprocmask(int, const sigset_t* __restrict, sigset_t* __restrict);
int sigsuspend(const sigset_t*);
int sigaction(int, const struct sigaction* __restrict, struct sigaction* __restrict);
int sigpending(sigset_t*);
int sigwait(const sigset_t* __restrict, int* __restrict);
int sigwaitinfo(const sigset_t* __restrict, siginfo_t* __restrict);
int sigtimedwait(const sigset_t* __restrict, siginfo_t* __restrict,
                 const struct timespec* __restrict);
int sigqueue(pid_t, int, const union sigval);

int pthread_sigmask(int, const sigset_t* __restrict, sigset_t* __restrict);
int pthread_kill(pthread_t, int);

void psiginfo(const siginfo_t*, const char*);
void psignal(int, const char*);

#endif

#if defined(_XOPEN_SOURCE) || defined(_BSD_SOURCE) || defined(_GNU_SOURCE)
int killpg(pid_t, int);
int sigaltstack(const stack_t* __restrict, stack_t* __restrict);
int siginterrupt(int, int);
int sigpause(int);
#define TRAP_BRKPT 1
#define TRAP_TRACE 2
#define POLL_IN 1
#define POLL_OUT 2
#define POLL_MSG 3
#define POLL_ERR 4
#define POLL_PRI 5
#define POLL_HUP 6
#define SS_ONSTACK 1
#define SS_DISABLE 2
#endif

#if defined(_BSD_SOURCE) || defined(_GNU_SOURCE)
#define NSIG _NSIG
typedef void (*sig_t)(int);
#endif

#ifdef _GNU_SOURCE
typedef void (*sighandler_t)(int);
void (*bsd_signal(int, void (*)(int)))(int);
int sigisemptyset(const sigset_t*);
int sigorset(sigset_t*, const sigset_t*, const sigset_t*);
int sigandset(sigset_t*, const sigset_t*, const sigset_t*);

#define SA_NOMASK SA_NODEFER
#define SA_ONESHOT SA_RESETHAND
#endif

#define SIG_ERR ((void (*)(int)) - 1)
#define SIG_DFL ((void (*)(int))0)
#define SIG_IGN ((void (*)(int))1)

typedef int sig_atomic_t;

void (*signal(int, void (*)(int)))(int);
int raise(int);

#ifdef __cplusplus
}
#endif