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/*
* Signal Manager
*
*
* COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
* On-Line Applications Research Corporation (OAR).
* All rights assigned to U.S. Government, 1994.
*
* This material may be reproduced by or for the U.S. Government pursuant
* to the copyright license under the clause at DFARS 252.227-7013. This
* notice must appear in all copies of this file and its derivatives.
*
* $Id$
*/
#include <rtems/system.h>
#include <rtems/asr.h>
#include <rtems/isr.h>
#include <rtems/modes.h>
#include <rtems/signal.h>
#include <rtems/thread.h>
/*PAGE
*
* rtems_signal_catch
*
* This directive allows a thread to specify what action to take when
* catching signals.
*
* Input parameters:
* handler - address of asynchronous signal routine (asr)
* ( NULL indicates asr is invalid )
* mode_set - mode value for asr
*
* Output parameters:
* RTEMS_SUCCESSFUL - always succeeds
*/
rtems_status_code rtems_signal_catch(
rtems_asr_entry handler,
rtems_mode mode_set
)
{
Thread_Control *executing;
executing = _Thread_Executing;
_Thread_Disable_dispatch(); /* cannot reschedule while */
/* the thread is inconsistent */
if ( ! _ASR_Is_null_handler( handler ) ) {
executing->Signal.mode_set = mode_set;
executing->Signal.handler = handler;
}
else
_ASR_Initialize( &executing->Signal );
_Thread_Enable_dispatch();
return( RTEMS_SUCCESSFUL );
}
/*PAGE
*
* rtems_signal_send
*
* This directive allows a thread to send signals to a thread.
*
* Input parameters:
* id - thread id
* signal_set - signal set
*
* Output parameters:
* RTEMS_SUCCESSFUL - if successful
* error code - if unsuccessful
*/
rtems_status_code rtems_signal_send(
Objects_Id id,
rtems_signal_set signal_set
)
{
register Thread_Control *the_thread;
Objects_Locations location;
the_thread = _Thread_Get( id, &location );
switch ( location ) {
case OBJECTS_ERROR:
return( RTEMS_INVALID_ID );
case OBJECTS_REMOTE:
return _Signal_MP_Send_request_packet(
SIGNAL_MP_SEND_REQUEST,
id,
signal_set
);
case OBJECTS_LOCAL:
if ( ! _ASR_Is_null_handler( the_thread->Signal.handler ) ) {
if ( _Modes_Is_asr_disabled( the_thread->current_modes ) )
_ASR_Post_signals( signal_set, &the_thread->Signal.signals_pending );
else {
_ASR_Post_signals( signal_set, &the_thread->Signal.signals_posted );
if ( _ISR_Is_in_progress() && _Thread_Is_executing( the_thread ) )
_ISR_Signals_to_thread_executing = TRUE;
}
_Thread_Enable_dispatch();
return( RTEMS_SUCCESSFUL );
}
_Thread_Enable_dispatch();
return( RTEMS_NOT_DEFINED );
}
return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */
}
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