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/*
* Event 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/event.h>
#include <rtems/isr.h>
#include <rtems/object.h>
#include <rtems/options.h>
#include <rtems/states.h>
#include <rtems/thread.h>
/*PAGE
*
* rtems_event_send
*
* This directive allows a thread send an event set to another thread.
*
* Input parameters:
* id - thread id
* event - event set
*
* Output parameters:
* RTEMS_SUCCESSFUL - if successful
* error code - if unsuccessful
*/
rtems_status_code rtems_event_send(
Objects_Id id,
rtems_event_set event_in
)
{
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(
_Event_MP_Send_request_packet(
EVENT_MP_SEND_REQUEST,
id,
event_in
)
);
case OBJECTS_LOCAL:
_Event_sets_Post( event_in, &the_thread->pending_events );
_Event_Surrender( the_thread );
_Thread_Enable_dispatch();
return( RTEMS_SUCCESSFUL );
}
return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */
}
/*PAGE
*
* rtems_event_receive
*
* This directive allows a thread to receive a set of events.
*
* Input parameters:
* event_in - input event condition
* option_set - options
* ticks - number of ticks to wait (0 means wait forever)
* event_out - pointer to output event set
*
* Output parameters:
* event out - event set
* RTEMS_SUCCESSFUL - if successful
* error code - if unsuccessful
*/
rtems_status_code rtems_event_receive(
rtems_event_set event_in,
rtems_option option_set,
rtems_interval ticks,
rtems_event_set *event_out
)
{
if ( _Event_sets_Is_empty( event_in ) ) {
*event_out = _Thread_Executing->pending_events;
return( RTEMS_SUCCESSFUL );
}
_Thread_Disable_dispatch();
_Event_Seize( event_in, option_set, ticks );
_Thread_Enable_dispatch();
*event_out = _Thread_Executing->events_out;
return( _Thread_Executing->Wait.return_code );
}
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