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/* Embedded systems may want the simulated signals if no other form exists,

   but UNIX versions will want to use the host facilities.

   Define SIMULATED_SIGNALS when you want to use the simulated versions.

*/

/*

FUNCTION

<<raise>>---send a signal

INDEX

        raise

INDEX

        _raise_r

ANSI_SYNOPSIS

        #include <signal.h>

        int raise(int <[sig]>);

        int _raise_r(void *<[reent]>, int <[sig]>);

TRAD_SYNOPSIS

        #include <signal.h>

        int raise(<[sig]>)

        int <[sig]>;

        int _raise_r(<[reent]>, <[sig]>)

        char *<[reent]>;

        int <[sig]>;

DESCRIPTION

Send the signal <[sig]> (one of the macros from `<<sys/signal.h>>').

This interrupts your program's normal flow of execution, and allows a signal

handler (if you've defined one, using <<signal>>) to take control.

The alternate function <<_raise_r>> is a reentrant version.  The extra

argument <[reent]> is a pointer to a reentrancy structure.

RETURNS

The result is <<0>> if <[sig]> was successfully raised, <<1>>

otherwise.  However, the return value (since it depends on the normal

flow of execution) may not be visible, unless the signal handler for

<[sig]> terminates with a <<return>> or unless <<SIG_IGN>> is in

effect for this signal.

PORTABILITY

ANSI C requires <<raise>>, but allows the full set of signal numbers

to vary from one implementation to another.

Required OS subroutines: <<getpid>>, <<kill>>.

*/

#ifndef SIGNAL_PROVIDED

int _dummy_raise;

#else

#include <reent.h>

#include <signal.h>

#ifndef _REENT_ONLY

int

_DEFUN (raise, (sig),

        int sig)

{

  return _raise_r (_REENT, sig);

}

#endif

int

_DEFUN (_raise_r, (reent, sig),

        struct _reent *reent _AND

        int sig)

{

  return _kill_r (reent, _getpid_r (reent), sig);

}

#endif /* SIGNAL_PROVIDED */