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/* sys/signal.h */

#ifndef _SYS_SIGNAL_H

#define _SYS_SIGNAL_H

#ifdef __cplusplus

extern "C" {

#endif

#include "_ansi.h"

#include <sys/features.h>

/* #ifndef __STRICT_ANSI__*/

#if defined(_POSIX_THREADS)

#include <sys/types.h>   /* for pthread data types */

#endif

typedef unsigned long sigset_t;

#if defined(__rtems__)

#if defined(_POSIX_REALTIME_SIGNALS)

/* sigev_notify values

   NOTE: P1003.1c/D10, p. 34 adds SIGEV_THREAD.  */

#define SIGEV_NONE   1  /* No asynchronous notification shall be delivered */

                        /*   when the event of interest occurs. */

#define SIGEV_SIGNAL 2  /* A queued signal, with an application defined */

                        /*  value, shall be delivered when the event of */

                        /*  interest occurs. */

#define SIGEV_THREAD 3  /* A notification function shall be called to */

                        /*   perform notification. */

/*  Signal Generation and Delivery, P1003.1b-1993, p. 63

    NOTE: P1003.1c/D10, p. 34 adds sigev_notify_function and

          sigev_notify_attributes to the sigevent structure.  */

union sigval {

  int    sival_int;    /* Integer signal value */

  void  *sival_ptr;    /* Pointer signal value */

};

struct sigevent {

  int              sigev_notify;               /* Notification type */

  int              sigev_signo;                /* Signal number */

  union sigval     sigev_value;                /* Signal value */

#if defined(_POSIX_THREADS)

  void           (*sigev_notify_function)( union sigval );

                                               /* Notification function */

  pthread_attr_t  *sigev_notify_attributes;    /* Notification Attributes */

#endif

};

/* Signal Actions, P1003.1b-1993, p. 64 */

/* si_code values, p. 66 */

#define SI_USER    1    /* Sent by a user. kill(), abort(), etc */

#define SI_QUEUE   2    /* Sent by sigqueue() */

#define SI_TIMER   3    /* Sent by expiration of a timer_settime() timer */

#define SI_ASYNCIO 4    /* Indicates completion of asycnhronous IO */

#define SI_MESGQ   5    /* Indicates arrival of a message at an empty queue */

typedef struct {

  int          si_signo;    /* Signal number */

  int          si_code;     /* Cause of the signal */

  union sigval si_value;    /* Signal value */

} siginfo_t;

#endif

/*  3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 */

#define SA_NOCLDSTOP 1   /* Do not generate SIGCHLD when children stop */

#define SA_SIGINFO   2   /* Invoke the signal catching function with */

                         /*   three arguments instead of one. */

/* struct sigaction notes from POSIX:

 *

 *  (1) Routines stored in sa_handler should take a single int as

 *      there argument although the POSIX standard does not require this.

 *  (2) The fields sa_handler and sa_sigaction may overlap, and a conforming

 *      application should not use both simultaneously.

 */

struct sigaction {

  int         sa_flags;       /* Special flags to affect behavior of signal */

  sigset_t    sa_mask;        /* Additional set of signals to be blocked */

                              /*   during execution of signal-catching */

                              /*   function. */

  union {

    void      (*_handler)();  /* SIG_DFL, SIG_IGN, or pointer to a function */

#if defined(_POSIX_REALTIME_SIGNALS)

    void      (*_sigaction)( int, siginfo_t *, void * );

#endif

  } _signal_handlers;

};

#define sa_handler    _signal_handlers._handler

#if defined(_POSIX_REALTIME_SIGNALS)

#define sa_sigaction  _signal_handlers._sigaction

#endif

#else

struct sigaction

{

        void (*sa_handler)(int);

        sigset_t sa_mask;

        int sa_flags;

};

#define SA_NOCLDSTOP 1  /* only value supported now for sa_flags */

#ifdef __CYGWIN__

# define SA_RESTART   0x10000000 /* Restart syscall on signal return.  */

# define SA_NODEFER   0x40000000 /* Don't automatically block the signal when

                                    its handler is being executed.  */

# define SA_RESETHAND 0x80000000 /* Reset to SIG_DFL on entry to handler.  */

#endif

#endif /* defined(__rtems__) */

#define SIG_SETMASK 0   /* set mask with sigprocmask() */

#define SIG_BLOCK 1     /* set of signals to block */

#define SIG_UNBLOCK 2   /* set of signals to, well, unblock */

/* These depend upon the type of sigset_t, which right now

   is always a long.. They're in the POSIX namespace, but

   are not ANSI. */

#define sigaddset(what,sig) (*(what) |= (1<<(sig)))

#define sigemptyset(what)   (*(what) = 0)

int _EXFUN(sigprocmask, (int how, const sigset_t *set, sigset_t *oset));

#if defined(_POSIX_THREADS)

int _EXFUN(pthread_sigmask, (int how, const sigset_t *set, sigset_t *oset));

#endif

/* protos for functions found in winsup sources for CYGWIN */

#if defined(__CYGWIN__) || defined(__rtems__)

#undef sigaddset

#undef sigemptyset

/* The first argument to kill should be pid_t.  Right now

   <sys/types.h> always defines pid_t to be int.  If that ever

   changes, then we will need to do something else, perhaps along the

   lines of <machine/types.h>.  */

int _EXFUN(kill, (int, int));

int _EXFUN(killpg, (pid_t, int));

int _EXFUN(sigaction, (int, const struct sigaction *, struct sigaction *));

int _EXFUN(sigaddset, (sigset_t *, const int));

int _EXFUN(sigdelset, (sigset_t *, const int));

int _EXFUN(sigismember, (const sigset_t *, int));

int _EXFUN(sigfillset, (sigset_t *));

int _EXFUN(sigemptyset, (sigset_t *));

int _EXFUN(sigpending, (sigset_t *));

int _EXFUN(sigsuspend, (const sigset_t *));

int _EXFUN(sigpause, (int));

#if defined(_POSIX_THREADS)

#ifdef __CYGWIN__

#  ifndef _CYGWIN_TYPES_H

#    error You need the winsup sources or a cygwin installation to compile the cygwin version of newlib.

#  endif

#endif

int _EXFUN(pthread_kill, (pthread_t thread, int sig));

#endif

#if defined(_POSIX_REALTIME_SIGNALS)

/*  3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76

    NOTE: P1003.1c/D10, p. 39 adds sigwait().  */

int _EXFUN(sigwaitinfo, (const sigset_t *set, siginfo_t *info));

int _EXFUN(sigtimedwait,

  (const sigset_t *set, siginfo_t *info, const struct timespec  *timeout)

);

int _EXFUN(sigwait, (const sigset_t *set, int *sig));

/*  3.3.9 Queue a Signal to a Process, P1003.1b-1993, p. 78 */

int _EXFUN(sigqueue, (pid_t pid, int signo, const union sigval value));

#endif /* defined(_POSIX_REALTIME_SIGNALS) */

#endif /* defined(__CYGWIN__) || defined(__rtems__) */

/* #endif __STRICT_ANSI__ */

#if defined(___AM29K__)

/* These all need to be defined for ANSI C, but I don't think they are

   meaningful.  */

#define SIGABRT 1

#define SIGFPE 1

#define SIGILL 1

#define SIGINT 1

#define SIGSEGV 1

#define SIGTERM 1

/* These need to be defined for POSIX, and some others do too.  */

#define SIGHUP 1

#define SIGQUIT 1

#define NSIG 2

#elif defined(__GO32__)

#define SIGINT  1

#define SIGKILL 2

#define SIGPIPE 3

#define SIGFPE  4

#define SIGHUP  5

#define SIGTERM 6

#define SIGSEGV 7

#define SIGTSTP 8

#define SIGQUIT 9

#define SIGTRAP 10

#define SIGILL  11

#define SIGEMT  12

#define SIGALRM 13

#define SIGBUS  14

#define SIGLOST 15

#define SIGSTOP 16

#define SIGABRT 17

#define SIGUSR1 18

#define SIGUSR2 19

#define NSIG    20

#elif defined(__CYGWIN__)       /* BSD signals semantics */

#define SIGHUP  1       /* hangup */

#define SIGINT  2       /* interrupt */

#define SIGQUIT 3       /* quit */

#define SIGILL  4       /* illegal instruction (not reset when caught) */

#define SIGTRAP 5       /* trace trap (not reset when caught) */

#define SIGABRT 6       /* used by abort */

#define SIGEMT  7       /* EMT instruction */

#define SIGFPE  8       /* floating point exception */

#define SIGKILL 9       /* kill (cannot be caught or ignored) */

#define SIGBUS  10      /* bus error */

#define SIGSEGV 11      /* segmentation violation */

#define SIGSYS  12      /* bad argument to system call */

#define SIGPIPE 13      /* write on a pipe with no one to read it */

#define SIGALRM 14      /* alarm clock */

#define SIGTERM 15      /* software termination signal from kill */

#define SIGURG  16      /* urgent condition on IO channel */

#define SIGSTOP 17      /* sendable stop signal not from tty */

#define SIGTSTP 18      /* stop signal from tty */

#define SIGCONT 19      /* continue a stopped process */

#define SIGCHLD 20      /* to parent on child stop or exit */

#define SIGCLD  20      /* System V name for SIGCHLD */

#define SIGTTIN 21      /* to readers pgrp upon background tty read */

#define SIGTTOU 22      /* like TTIN for output if (tp->t_local&LTOSTOP) */

#define SIGIO   23      /* input/output possible signal */

#define SIGPOLL SIGIO   /* System V name for SIGIO */

#define SIGXCPU 24      /* exceeded CPU time limit */

#define SIGXFSZ 25      /* exceeded file size limit */

#define SIGVTALRM 26    /* virtual time alarm */

#define SIGPROF 27      /* profiling time alarm */

#define SIGWINCH 28     /* window changed */

#define SIGLOST 29      /* resource lost (eg, record-lock lost) */

#define SIGUSR1 30      /* user defined signal 1 */

#define SIGUSR2 31      /* user defined signal 2 */

#define NSIG    32      /* signal 0 implied */

#else

#define SIGHUP  1       /* hangup */

#define SIGINT  2       /* interrupt */

#define SIGQUIT 3       /* quit */

#define SIGILL  4       /* illegal instruction (not reset when caught) */

#define SIGTRAP 5       /* trace trap (not reset when caught) */

#define SIGIOT  6       /* IOT instruction */

#define SIGABRT 6       /* used by abort, replace SIGIOT in the future */

#define SIGEMT  7       /* EMT instruction */

#define SIGFPE  8       /* floating point exception */

#define SIGKILL 9       /* kill (cannot be caught or ignored) */

#define SIGBUS  10      /* bus error */

#define SIGSEGV 11      /* segmentation violation */

#define SIGSYS  12      /* bad argument to system call */

#define SIGPIPE 13      /* write on a pipe with no one to read it */

#define SIGALRM 14      /* alarm clock */

#define SIGTERM 15      /* software termination signal from kill */

#if defined(__rtems__)

#define SIGUSR1 16  /* reserved as application defined signal 1 */

#define SIGUSR2 17  /* reserved as application defined signal 2 */

#define __SIGFIRSTNOTRT SIGHUP

#define __SIGLASTNOTRT  SIGUSR2

/* RTEMS does not support job control, hence no Job Control Signals are

   defined per P1003.1b-1993, p. 60-61.

   RTEMS does not support memory protection, hence no Memory Protection

   Signals are defined per P1003.1b-1993, p. 60-61. */

/* Real-Time Signals Range, P1003.1b-1993, p. 61

   NOTE: By P1003.1b-1993, this should be at least RTSIG_MAX

         (which is a minimum of 8) signals.

 */

#define SIGRTMIN 18

#define SIGRTMAX 32

#elif defined(__svr4__)

/* svr4 specifics. different signals above 15, and sigaction. */

#define SIGUSR1 16

#define SIGUSR2 17

#define SIGCLD  18

#define SIGPWR  19

#define SIGWINCH 20

#define SIGPOLL 22      /* 20 for x.out binaries!!!! */

#define SIGSTOP 23      /* sendable stop signal not from tty */

#define SIGTSTP 24      /* stop signal from tty */

#define SIGCONT 25      /* continue a stopped process */

#define SIGTTIN 26      /* to readers pgrp upon background tty read */

#define SIGTTOU 27      /* like TTIN for output if (tp->t_local&LTOSTOP) */

#define NSIG    28      

#else

#define SIGURG  16      /* urgent condition on IO channel */

#define SIGSTOP 17      /* sendable stop signal not from tty */

#define SIGTSTP 18      /* stop signal from tty */

#define SIGCONT 19      /* continue a stopped process */

#define SIGCHLD 20      /* to parent on child stop or exit */

#define SIGCLD  20      /* System V name for SIGCHLD */

#define SIGTTIN 21      /* to readers pgrp upon background tty read */

#define SIGTTOU 22      /* like TTIN for output if (tp->t_local&LTOSTOP) */

#define SIGIO   23      /* input/output possible signal */

#define SIGPOLL SIGIO   /* System V name for SIGIO */

#define SIGXCPU 24      /* exceeded CPU time limit */

#define SIGXFSZ 25      /* exceeded file size limit */

#define SIGVTALRM 26    /* virtual time alarm */

#define SIGPROF 27      /* profiling time alarm */

#define SIGWINCH 28     /* window changed */

#define SIGLOST 29      /* resource lost (eg, record-lock lost) */

#define SIGUSR1 30      /* user defined signal 1 */

#define SIGUSR2 31      /* user defined signal 2 */

#define NSIG    32      /* signal 0 implied */

#endif

#endif

#ifdef __cplusplus

}

#endif

#endif /* _SYS_SIGNAL_H */