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/*

 *  $Id: psignalchecksignal.c,v 1.2 2001-09-27 11:59:17 chris Exp $

 */

#include <assert.h>

#include <errno.h>

#include <pthread.h>

#include <signal.h>

#include <rtems/system.h>

#include <rtems/score/isr.h>

#include <rtems/score/thread.h>

#include <rtems/score/tqdata.h>

#include <rtems/score/wkspace.h>

#include <rtems/posix/seterr.h>

#include <rtems/posix/threadsup.h>

#include <rtems/posix/psignal.h>

#include <rtems/posix/pthread.h>

#include <rtems/posix/time.h>

#include <stdio.h>

/*PAGE

 *

 *  _POSIX_signals_Check_signal

 */

boolean _POSIX_signals_Check_signal(

  POSIX_API_Control  *api,

  int                 signo,

  boolean             is_global

)

{

  siginfo_t                   siginfo_struct;

  sigset_t                    saved_signals_blocked;

  if ( ! _POSIX_signals_Clear_signals( api, signo, &siginfo_struct,

                                       is_global, TRUE ) )

    return FALSE;

  /*

   *  Since we made a union of these, only one test is necessary but this is

   *  safer.

   */

  assert( _POSIX_signals_Vectors[ signo ].sa_handler ||

          _POSIX_signals_Vectors[ signo ].sa_sigaction );

  /*

   *  Just to prevent sending a signal which is currently being ignored.

   */

  if ( _POSIX_signals_Vectors[ signo ].sa_handler == SIG_IGN )

    return FALSE;

  /*

   *  Block the signals requested in sa_mask

   */

  saved_signals_blocked = api->signals_blocked;

  api->signals_blocked |= _POSIX_signals_Vectors[ signo ].sa_mask;

  /* Here, the signal handler function executes */

  switch ( _POSIX_signals_Vectors[ signo ].sa_flags ) {

    case SA_SIGINFO:

/*

 *

 *     assert( is_global );

 */

      (*_POSIX_signals_Vectors[ signo ].sa_sigaction)(

        signo,

        &siginfo_struct,

        NULL        /* context is undefined per 1003.1b-1993, p. 66 */

      );

      break;

    default:

      (*_POSIX_signals_Vectors[ signo ].sa_handler)( signo );

      break;

  }

  /*

   *  Restore the previous set of blocked signals

   */

  api->signals_blocked = saved_signals_blocked;

  return TRUE;

}