/*
* Multiprocessing Support for the Semaphore 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/rtems/status.h>
#include <rtems/score/mpci.h>
#include <rtems/score/mppkt.h>
#include <rtems/score/object.h>
#include <rtems/rtems/options.h>
#include <rtems/rtems/sem.h>
#include <rtems/score/thread.h>
#include <rtems/score/watchdog.h>
#include <rtems/rtems/support.h>
/*PAGE
*
* _Semaphore_MP_Send_process_packet
*
*/
void _Semaphore_MP_Send_process_packet (
Semaphore_MP_Remote_operations operation,
Objects_Id semaphore_id,
rtems_name name,
Objects_Id proxy_id
)
{
Semaphore_MP_Packet *the_packet;
unsigned32 node;
switch ( operation ) {
case SEMAPHORE_MP_ANNOUNCE_CREATE:
case SEMAPHORE_MP_ANNOUNCE_DELETE:
case SEMAPHORE_MP_EXTRACT_PROXY:
the_packet = _Semaphore_MP_Get_packet();
the_packet->Prefix.the_class = MP_PACKET_SEMAPHORE;
the_packet->Prefix.length = sizeof ( Semaphore_MP_Packet );
the_packet->Prefix.to_convert = sizeof ( Semaphore_MP_Packet );
the_packet->operation = operation;
the_packet->Prefix.id = semaphore_id;
the_packet->name = name;
the_packet->proxy_id = proxy_id;
if ( operation == SEMAPHORE_MP_EXTRACT_PROXY )
node = rtems_get_node( semaphore_id );
else
node = MPCI_ALL_NODES;
_MPCI_Send_process_packet( node, &the_packet->Prefix );
break;
case SEMAPHORE_MP_OBTAIN_REQUEST:
case SEMAPHORE_MP_OBTAIN_RESPONSE:
case SEMAPHORE_MP_RELEASE_REQUEST:
case SEMAPHORE_MP_RELEASE_RESPONSE:
break;
}
}
/*PAGE
*
* _Semaphore_MP_Send_request_packet
*
*/
rtems_status_code _Semaphore_MP_Send_request_packet (
Semaphore_MP_Remote_operations operation,
Objects_Id semaphore_id,
rtems_option option_set,
rtems_interval timeout
)
{
Semaphore_MP_Packet *the_packet;
switch ( operation ) {
case SEMAPHORE_MP_OBTAIN_REQUEST:
case SEMAPHORE_MP_RELEASE_REQUEST:
the_packet = _Semaphore_MP_Get_packet();
the_packet->Prefix.the_class = MP_PACKET_SEMAPHORE;
the_packet->Prefix.length = sizeof ( Semaphore_MP_Packet );
the_packet->Prefix.to_convert = sizeof ( Semaphore_MP_Packet );
if ( ! _Options_Is_no_wait(option_set))
the_packet->Prefix.timeout = timeout;
the_packet->operation = operation;
the_packet->Prefix.id = semaphore_id;
the_packet->option_set = option_set;
return _MPCI_Send_request_packet(
rtems_get_node( semaphore_id ),
&the_packet->Prefix,
STATES_WAITING_FOR_SEMAPHORE
);
break;
case SEMAPHORE_MP_ANNOUNCE_CREATE:
case SEMAPHORE_MP_ANNOUNCE_DELETE:
case SEMAPHORE_MP_EXTRACT_PROXY:
case SEMAPHORE_MP_OBTAIN_RESPONSE:
case SEMAPHORE_MP_RELEASE_RESPONSE:
break;
}
/*
* The following line is included to satisfy compilers which
* produce warnings when a function does not end with a return.
*/
return RTEMS_SUCCESSFUL;
}
/*PAGE
*
* _Semaphore_MP_Send_response_packet
*
*/
void _Semaphore_MP_Send_response_packet (
Semaphore_MP_Remote_operations operation,
Objects_Id semaphore_id,
Thread_Control *the_thread
)
{
Semaphore_MP_Packet *the_packet;
switch ( operation ) {
case SEMAPHORE_MP_OBTAIN_RESPONSE:
case SEMAPHORE_MP_RELEASE_RESPONSE:
the_packet = ( Semaphore_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(
rtems_get_node( the_packet->Prefix.source_tid ),
&the_packet->Prefix
);
break;
case SEMAPHORE_MP_ANNOUNCE_CREATE:
case SEMAPHORE_MP_ANNOUNCE_DELETE:
case SEMAPHORE_MP_EXTRACT_PROXY:
case SEMAPHORE_MP_OBTAIN_REQUEST:
case SEMAPHORE_MP_RELEASE_REQUEST:
break;
}
}
/*PAGE
*
*
* _Semaphore_MP_Process_packet
*
*/
void _Semaphore_MP_Process_packet (
rtems_packet_prefix *the_packet_prefix
)
{
Semaphore_MP_Packet *the_packet;
Thread_Control *the_thread;
boolean ignored;
the_packet = (Semaphore_MP_Packet *) the_packet_prefix;
switch ( the_packet->operation ) {
case SEMAPHORE_MP_ANNOUNCE_CREATE:
ignored = _Objects_MP_Allocate_and_open(
&_Semaphore_Information,
the_packet->name,
the_packet->Prefix.id,
TRUE
);
_MPCI_Return_packet( the_packet_prefix );
break;
case SEMAPHORE_MP_ANNOUNCE_DELETE:
_Objects_MP_Close( &_Semaphore_Information, the_packet->Prefix.id );
_MPCI_Return_packet( the_packet_prefix );
break;
case SEMAPHORE_MP_EXTRACT_PROXY:
the_thread = _Thread_MP_Find_proxy( the_packet->proxy_id );
if ( ! _Thread_Is_null( the_thread ) )
_Thread_queue_Extract( the_thread->Wait.queue, the_thread );
_MPCI_Return_packet( the_packet_prefix );
break;
case SEMAPHORE_MP_OBTAIN_REQUEST:
the_packet->Prefix.return_code = rtems_semaphore_obtain(
the_packet->Prefix.id,
the_packet->option_set,
the_packet->Prefix.timeout
);
if ( ! _Thread_Is_proxy_blocking( the_packet->Prefix.return_code ) )
_Semaphore_MP_Send_response_packet(
SEMAPHORE_MP_OBTAIN_RESPONSE,
the_packet->Prefix.id,
_Thread_Executing
);
break;
case SEMAPHORE_MP_OBTAIN_RESPONSE:
case SEMAPHORE_MP_RELEASE_RESPONSE:
the_thread = _MPCI_Process_response( the_packet_prefix );
_MPCI_Return_packet( the_packet_prefix );
break;
case SEMAPHORE_MP_RELEASE_REQUEST:
the_packet->Prefix.return_code = rtems_semaphore_release(
the_packet->Prefix.id
);
_Semaphore_MP_Send_response_packet(
SEMAPHORE_MP_RELEASE_RESPONSE,
the_packet->Prefix.id,
_Thread_Executing
);
break;
}
}
/*PAGE
*
* _Semaphore_MP_Send_object_was_deleted
*
*/
void _Semaphore_MP_Send_object_was_deleted (
Thread_Control *the_proxy
)
{
the_proxy->receive_packet->return_code = RTEMS_OBJECT_WAS_DELETED;
_Semaphore_MP_Send_response_packet(
SEMAPHORE_MP_OBTAIN_RESPONSE,
the_proxy->Wait.id,
the_proxy
);
}
/*PAGE
*
* _Semaphore_MP_Send_extract_proxy
*
*/
void _Semaphore_MP_Send_extract_proxy (
Thread_Control *the_thread
)
{
_Semaphore_MP_Send_process_packet(
SEMAPHORE_MP_EXTRACT_PROXY,
the_thread->Wait.id,
(rtems_name) 0,
the_thread->Object.id
);
}
/*PAGE
*
* _Semaphore_MP_Get_packet
*
*/
Semaphore_MP_Packet *_Semaphore_MP_Get_packet ( void )
{
return ( (Semaphore_MP_Packet *) _MPCI_Get_packet() );
}
/* end of file */
