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/**
* @file
*
* @brief RTEMS Tasks MP Send Process Packet
* @ingroup ClassicTaskMP Task MP Support
*/
/*
* COPYRIGHT (c) 1989-2008.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/rtems/tasksimpl.h>
#include <rtems/rtems/optionsimpl.h>
#include <rtems/rtems/statusimpl.h>
#include <rtems/score/statesimpl.h>
#include <rtems/score/threadimpl.h>
#include <rtems/score/threadqimpl.h>
/**
* The following data structure defines the packet used to perform
* remote task operations.
*/
typedef struct {
rtems_packet_prefix Prefix;
RTEMS_tasks_MP_Remote_operations operation;
rtems_name name;
rtems_task_priority the_priority;
} RTEMS_tasks_MP_Packet;
RTEMS_STATIC_ASSERT(
sizeof(RTEMS_tasks_MP_Packet) <= MP_PACKET_MINIMUM_PACKET_SIZE,
RTEMS_tasks_MP_Packet
);
static RTEMS_tasks_MP_Packet *_RTEMS_tasks_MP_Get_packet( void )
{
return (RTEMS_tasks_MP_Packet *) _MPCI_Get_packet();
}
static RTEMS_tasks_MP_Packet *_RTEMS_tasks_MP_Get_request_packet(
Objects_Id id
)
{
if ( !_Thread_MP_Is_remote( id ) ) {
return NULL;
}
return _RTEMS_tasks_MP_Get_packet();
}
/*
* _RTEMS_tasks_MP_Send_process_packet
*
*/
void _RTEMS_tasks_MP_Send_process_packet (
RTEMS_tasks_MP_Remote_operations operation,
Objects_Id task_id,
rtems_name name
)
{
RTEMS_tasks_MP_Packet *the_packet;
switch ( operation ) {
case RTEMS_TASKS_MP_ANNOUNCE_CREATE:
case RTEMS_TASKS_MP_ANNOUNCE_DELETE:
the_packet = _RTEMS_tasks_MP_Get_packet();
the_packet->Prefix.the_class = MP_PACKET_TASKS;
the_packet->Prefix.length = sizeof ( RTEMS_tasks_MP_Packet );
the_packet->Prefix.to_convert = sizeof ( RTEMS_tasks_MP_Packet );
the_packet->operation = operation;
the_packet->Prefix.id = task_id;
the_packet->name = name;
_MPCI_Send_process_packet( MPCI_ALL_NODES, &the_packet->Prefix );
break;
case RTEMS_TASKS_MP_SUSPEND_REQUEST:
case RTEMS_TASKS_MP_SUSPEND_RESPONSE:
case RTEMS_TASKS_MP_RESUME_REQUEST:
case RTEMS_TASKS_MP_RESUME_RESPONSE:
case RTEMS_TASKS_MP_SET_PRIORITY_REQUEST:
case RTEMS_TASKS_MP_SET_PRIORITY_RESPONSE:
break;
}
}
static rtems_status_code _RTEMS_tasks_MP_Send_request_packet(
RTEMS_tasks_MP_Packet *the_packet,
Objects_Id id,
RTEMS_tasks_MP_Remote_operations operation
)
{
Status_Control status;
the_packet->Prefix.the_class = MP_PACKET_TASKS;
the_packet->Prefix.length = sizeof( *the_packet );
the_packet->Prefix.to_convert = sizeof( *the_packet );
the_packet->Prefix.id = id;
the_packet->operation = operation;
status = _MPCI_Send_request_packet(
_Objects_Get_node( id ),
&the_packet->Prefix,
STATES_READY /* Not used */
);
return _Status_Get( status );
}
rtems_status_code _RTEMS_tasks_MP_Set_priority(
rtems_id id,
rtems_task_priority new_priority,
rtems_task_priority *old_priority
)
{
RTEMS_tasks_MP_Packet *the_packet;
the_packet = _RTEMS_tasks_MP_Get_request_packet( id );
if ( the_packet == NULL ) {
return RTEMS_INVALID_ID;
}
the_packet->the_priority = new_priority;
_Thread_Executing->Wait.return_argument = old_priority;
return _RTEMS_tasks_MP_Send_request_packet(
the_packet,
id,
RTEMS_TASKS_MP_SET_PRIORITY_REQUEST
);
}
rtems_status_code _RTEMS_tasks_MP_Suspend( rtems_id id )
{
RTEMS_tasks_MP_Packet *the_packet;
the_packet = _RTEMS_tasks_MP_Get_request_packet( id );
if ( the_packet == NULL ) {
return RTEMS_INVALID_ID;
}
return _RTEMS_tasks_MP_Send_request_packet(
the_packet,
id,
RTEMS_TASKS_MP_SUSPEND_REQUEST
);
}
rtems_status_code _RTEMS_tasks_MP_Resume( rtems_id id )
{
RTEMS_tasks_MP_Packet *the_packet;
the_packet = _RTEMS_tasks_MP_Get_request_packet( id );
if ( the_packet == NULL ) {
return RTEMS_INVALID_ID;
}
return _RTEMS_tasks_MP_Send_request_packet(
the_packet,
id,
RTEMS_TASKS_MP_RESUME_REQUEST
);
}
/*
* _RTEMS_tasks_MP_Send_response_packet
*
*/
static void _RTEMS_tasks_MP_Send_response_packet (
RTEMS_tasks_MP_Remote_operations operation,
Thread_Control *the_thread
)
{
RTEMS_tasks_MP_Packet *the_packet;
switch ( operation ) {
case RTEMS_TASKS_MP_SUSPEND_RESPONSE:
case RTEMS_TASKS_MP_RESUME_RESPONSE:
case RTEMS_TASKS_MP_SET_PRIORITY_RESPONSE:
the_packet = (RTEMS_tasks_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 RTEMS_TASKS_MP_ANNOUNCE_CREATE:
case RTEMS_TASKS_MP_ANNOUNCE_DELETE:
case RTEMS_TASKS_MP_SUSPEND_REQUEST:
case RTEMS_TASKS_MP_RESUME_REQUEST:
case RTEMS_TASKS_MP_SET_PRIORITY_REQUEST:
break;
}
}
/*
*
* _RTEMS_tasks_MP_Process_packet
*
*/
void _RTEMS_tasks_MP_Process_packet (
rtems_packet_prefix *the_packet_prefix
)
{
RTEMS_tasks_MP_Packet *the_packet;
Thread_Control *the_thread;
the_packet = (RTEMS_tasks_MP_Packet *) the_packet_prefix;
switch ( the_packet->operation ) {
case RTEMS_TASKS_MP_ANNOUNCE_CREATE:
_Objects_MP_Allocate_and_open(
&_RTEMS_tasks_Information.Objects,
the_packet->name,
the_packet->Prefix.id,
true
);
_MPCI_Return_packet( the_packet_prefix );
break;
case RTEMS_TASKS_MP_ANNOUNCE_DELETE:
_Objects_MP_Close(
&_RTEMS_tasks_Information.Objects,
the_packet->Prefix.id
);
_MPCI_Return_packet( the_packet_prefix );
break;
case RTEMS_TASKS_MP_SUSPEND_REQUEST:
the_packet->Prefix.return_code = rtems_task_suspend(
the_packet->Prefix.id
);
_RTEMS_tasks_MP_Send_response_packet(
RTEMS_TASKS_MP_SUSPEND_RESPONSE,
_Thread_Executing
);
break;
case RTEMS_TASKS_MP_SUSPEND_RESPONSE:
case RTEMS_TASKS_MP_RESUME_RESPONSE:
the_thread = _MPCI_Process_response( the_packet_prefix );
_MPCI_Return_packet( the_packet_prefix );
break;
case RTEMS_TASKS_MP_RESUME_REQUEST:
the_packet->Prefix.return_code = rtems_task_resume(
the_packet->Prefix.id
);
_RTEMS_tasks_MP_Send_response_packet(
RTEMS_TASKS_MP_RESUME_RESPONSE,
_Thread_Executing
);
break;
case RTEMS_TASKS_MP_SET_PRIORITY_REQUEST:
the_packet->Prefix.return_code = rtems_task_set_priority(
the_packet->Prefix.id,
the_packet->the_priority,
&the_packet->the_priority
);
_RTEMS_tasks_MP_Send_response_packet(
RTEMS_TASKS_MP_SET_PRIORITY_RESPONSE,
_Thread_Executing
);
break;
case RTEMS_TASKS_MP_SET_PRIORITY_RESPONSE:
the_thread = _MPCI_Process_response( the_packet_prefix );
*(rtems_task_priority *)the_thread->Wait.return_argument =
the_packet->the_priority;
_MPCI_Return_packet( the_packet_prefix );
break;
}
}
/*
* _RTEMS_tasks_MP_Send_object_was_deleted
*
* This routine is not neededby the Tasks since a task
* cannot be globally deleted.
*
*/
/*
* _RTEMS_tasks_MP_Send_extract_proxy
*
* This routine is not neededby the Tasks since a task
* cannot be globally deleted.
*
*/
/* end of file */
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