/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSImplClassicEventMP
*
* @brief This source file contains the implementation to support the Event
* Manager in multiprocessing (MP) configurations.
*/
/*
* COPYRIGHT (c) 1989-2008.
* On-Line Applications Research Corporation (OAR).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/rtems/eventimpl.h>
#include <rtems/rtems/statusimpl.h>
#include <rtems/score/threadimpl.h>
#include <rtems/score/statesimpl.h>
/**
* The following enumerated type defines the list of
* remote event operations.
*/
typedef enum {
EVENT_MP_SEND_REQUEST = 0,
EVENT_MP_SEND_RESPONSE = 1
} Event_MP_Remote_operations;
/**
* The following data structure defines the packet used to perform
* remote event operations.
*/
typedef struct {
rtems_packet_prefix Prefix;
Event_MP_Remote_operations operation;
rtems_event_set event_in;
} Event_MP_Packet;
RTEMS_STATIC_ASSERT(
sizeof(Event_MP_Packet) <= MP_PACKET_MINIMUM_PACKET_SIZE,
Event_MP_Packet
);
static Event_MP_Packet *_Event_MP_Get_packet( Objects_Id id )
{
if ( !_Thread_MP_Is_remote( id ) ) {
return NULL;
}
return (Event_MP_Packet *) _MPCI_Get_packet();
}
rtems_status_code _Event_MP_Send(
rtems_id id,
rtems_event_set event_in
)
{
Event_MP_Packet *the_packet;
Status_Control status;
the_packet = _Event_MP_Get_packet( id );
if ( the_packet == NULL ) {
return RTEMS_INVALID_ID;
}
the_packet->Prefix.the_class = MP_PACKET_EVENT;
the_packet->Prefix.length = sizeof ( *the_packet );
the_packet->Prefix.to_convert = sizeof ( *the_packet );
the_packet->operation = EVENT_MP_SEND_REQUEST;
the_packet->Prefix.id = id;
the_packet->event_in = event_in;
status = _MPCI_Send_request_packet(
_Objects_Get_node( id ),
&the_packet->Prefix,
STATES_READY
);
return _Status_Get( status );
}
static void _Event_MP_Send_response_packet (
Event_MP_Remote_operations operation,
Thread_Control *the_thread
)
{
Event_MP_Packet *the_packet;
switch ( operation ) {
case EVENT_MP_SEND_RESPONSE:
the_packet = ( Event_MP_Packet *) the_thread->receive_packet;
/*
* The packet being returned already contains the class, length, and
* to_convert fields, therefore they are not set in this routine.
*/
the_packet->operation = operation;
the_packet->Prefix.id = the_packet->Prefix.source_tid;
_MPCI_Send_response_packet(
_Objects_Get_node( the_packet->Prefix.source_tid ),
&the_packet->Prefix
);
break;
case EVENT_MP_SEND_REQUEST:
break;
}
}
void _Event_MP_Process_packet (
rtems_packet_prefix *the_packet_prefix
)
{
Event_MP_Packet *the_packet;
the_packet = (Event_MP_Packet *) the_packet_prefix;
switch ( the_packet->operation ) {
case EVENT_MP_SEND_REQUEST:
the_packet->Prefix.return_code = rtems_event_send(
the_packet->Prefix.id,
the_packet->event_in
);
_Event_MP_Send_response_packet(
EVENT_MP_SEND_RESPONSE,
_Thread_Executing
);
break;
case EVENT_MP_SEND_RESPONSE: {
_MPCI_Process_response( the_packet_prefix );
_MPCI_Return_packet( the_packet_prefix );
break;
}
}
}
/*
* _Event_MP_Send_object_was_deleted
*
* This subprogram is not needed since there are no objects
* deleted by this manager.
*
*/
/*
* _Event_MP_Send_extract_proxy
*
* This subprogram is not needed since there are no objects
* deleted by this manager.
*
*/
/* end of file */