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/*

 *  psignalclearsignals.c,v 1.3 2001/01/24 14:17:28 joel Exp

 */

#if HAVE_CONFIG_H

#include "config.h"

#endif

#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/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_Clear_signals

 */

boolean _POSIX_signals_Clear_signals(

  POSIX_API_Control  *api,

  int                 signo,

  siginfo_t          *info,

  boolean             is_global,

  boolean             check_blocked

)

{

  sigset_t                    mask;

  sigset_t                    signals_blocked;

  ISR_Level                   level;

  boolean                     do_callout;

  POSIX_signals_Siginfo_node *psiginfo;

  mask = signo_to_mask( signo );

  do_callout = FALSE;

  /* set blocked signals based on if checking for them, SIGNAL_ALL_MASK

   * insures that no signals are blocked and all are checked.

   */

  if ( check_blocked )

    signals_blocked = ~api->signals_blocked;

  else

    signals_blocked = SIGNAL_ALL_MASK;

  /* XXX this is not right for siginfo type signals yet */

  /* XXX since they can't be cleared the same way */

  _ISR_Disable( level );

    if ( is_global ) {

       if ( mask & (_POSIX_signals_Pending & signals_blocked) ) {

         if ( _POSIX_signals_Vectors[ signo ].sa_flags == SA_SIGINFO ) {

           psiginfo = (POSIX_signals_Siginfo_node *)

             _Chain_Get_unprotected( &_POSIX_signals_Siginfo[ signo ] );

           if ( _Chain_Is_empty( &_POSIX_signals_Siginfo[ signo ] ) )

             _POSIX_signals_Clear_process_signals( mask );

           if ( psiginfo ) {

             *info = psiginfo->Info;

             _Chain_Append_unprotected(

               &_POSIX_signals_Inactive_siginfo,

               &psiginfo->Node

             );

           } else

             do_callout = FALSE;

         } else

           _POSIX_signals_Clear_process_signals( mask );

         do_callout = TRUE;

       }

    } else {

      if ( mask & (api->signals_pending & signals_blocked) ) {

        api->signals_pending &= ~mask;

        do_callout = TRUE;

      }

    }

  _ISR_Enable( level );

  return do_callout;

}