/*-
 * Copyright (c) 2002-2018 The UbixOS Project.
 * All rights reserved.
 *
 * This was developed by Christopher W. Olsen for the UbixOS Project.
 *
 * 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, the following disclaimer and the list of authors.
 * 2) Redistributions in binary form must reproduce the above copyright notice, this list of
 *    conditions, the following disclaimer and the list of authors in the documentation and/or
 *    other materials provided with the distribution.
 * 3) Neither the name of the UbixOS Project 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 AUTHOR 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 OWNER 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 _SYS_SIGNAL_H
#define _SYS_SIGNAL_H

#include <sys/types.h>

#define _SIG_WORDS      4
#define _SIG_MAXSIG     128
#define _SIG_IDX(sig)   ((sig) - 1)
#define _SIG_WORD(sig)  (_SIG_IDX(sig) >> 5)
#define _SIG_BIT(sig)   (1 << (_SIG_IDX(sig) & 31))
#define _SIG_VALID(sig) ((sig) <= _SIG_MAXSIG && (sig) > 0)

// Flags for sigprocmask:
#define SIG_BLOCK       1       /* block specified signal set */
#define SIG_UNBLOCK     2       /* unblock specified signal set */
#define SIG_SETMASK     3       /* set specified signal set */

typedef struct __sigset {
        __uint32_t __bits[_SIG_WORDS];
  } __sigset_t;

typedef __sigset_t sigset_t;

// Signal vector "template" used in sigaction call.
struct sigaction {
        union {
                void    (*__sa_handler)(int);
                void    (*__sa_sigaction)(int, struct __siginfo *, void *);
        } __sigaction_u;                /* signal handler */
        int     sa_flags;               /* see signal options below */
        sigset_t sa_mask;               /* signal mask to apply */
};

#define sa_handler      __sigaction_u.__sa_handler
#define sa_sigaction    __sigaction_u.__sa_sigaction


#endif /* END _SYS_SIGNAL_H */