/*
 * File      : signals.h
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2017, RT-Thread Development Team
 *
 *  This program 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 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Change Logs:
 * Date           Author       Notes
 * 2017/10/1      Bernard      The first version
 */

#ifndef POSIX_SIGNAL_H__
#define POSIX_SIGNAL_H__

#ifdef __cplusplus
extern "C" {
#endif

#include <rtthread.h>

enum rt_signal_value{
    SIG1 = SIGHUP,
    SIG2 = SIGINT,
    SIG3 = SIGQUIT,
    SIG4 = SIGILL,
    SIG5 = SIGTRAP,
    SIG6 = SIGABRT,
    SIG7 = SIGEMT,
    SIG8 = SIGFPE,
    SIG9 = SIGKILL,
    SIG10 = SIGBUS,
    SIG11 = SIGSEGV,
    SIG12 = SIGSYS,
    SIG13 = SIGPIPE,
    SIG14 = SIGALRM,
    SIG15 = SIGTERM,
    SIG16 = SIGURG,
    SIG17 = SIGSTOP,
    SIG18 = SIGTSTP,
    SIG19 = SIGCONT,
    SIG20 = SIGCHLD,
    SIG21 = SIGTTIN,
    SIG22 = SIGTTOU,
    SIG23 = SIGPOLL,
    SIG24 = 24, // SIGXCPU,
    SIG25 = 25, // SIGXFSZ,
    SIG26 = 26, // SIGVTALRM,
    SIG27 = 27, // SIGPROF,
    SIG28 = SIGWINCH,
    SIG29 = 29, // SIGLOST,
    SIG30 = SIGUSR1,
    SIG31 = SIGUSR2,
    SIGRT_MIN = 27, // SIGRTMIN,
    SIGRT_MAX = 31, // SIGRTMAX,
    SIGMAX = NSIG,
};

/*
The structure definitions on newlib:

typedef void (*_sig_func_ptr)(int);

struct sigaction
{
    _sig_func_ptr sa_handler;
    sigset_t sa_mask;
    int sa_flags;
};

typedef int sig_atomic_t;

typedef _sig_func_ptr sig_t;
typedef _sig_func_ptr sighandler_t;

When enable POSIX_REALTIME_SIGNALS/POSIX_THREADS:

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

struct sigevent {
  int sigev_notify;
  int sigev_signo;
  union sigval sigev_value;

  void (*sigev_notify_function)( union sigval );

  pthread_attr_t *sigev_notify_attributes;

};

typedef struct {
  int si_signo;
  int si_code;
  union sigval si_value;
} siginfo_t;

*/

rt_sighandler_t rt_signal_install(int signo, rt_sighandler_t handler);
void rt_signal_mask(int signo);
void rt_signal_unmask(int signo);
int rt_thread_kill(rt_thread_t tid, int sig);

int rt_system_signal_init(void);

#ifdef __cplusplus
}
#endif

#endif