/*
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/*
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* Message Queue Manager
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* Message Queue Manager
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*
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*
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*
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*
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* COPYRIGHT (c) 1989-1999.
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* COPYRIGHT (c) 1989-1999.
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* On-Line Applications Research Corporation (OAR).
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* On-Line Applications Research Corporation (OAR).
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*
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*
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* The license and distribution terms for this file may be
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* found in the file LICENSE in this distribution or at
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* http://www.OARcorp.com/rtems/license.html.
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* http://www.OARcorp.com/rtems/license.html.
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*
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*
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* $Id: msgqgetnumberpending.c,v 1.2 2001-09-27 11:59:19 chris Exp $
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* $Id: msgqgetnumberpending.c,v 1.2 2001-09-27 11:59:19 chris Exp $
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*/
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*/
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#include <rtems/system.h>
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#include <rtems/system.h>
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#include <rtems/score/sysstate.h>
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#include <rtems/score/sysstate.h>
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#include <rtems/score/chain.h>
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#include <rtems/score/chain.h>
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#include <rtems/score/isr.h>
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#include <rtems/score/isr.h>
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#include <rtems/score/coremsg.h>
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#include <rtems/score/coremsg.h>
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#include <rtems/score/object.h>
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#include <rtems/score/object.h>
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#include <rtems/score/states.h>
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#include <rtems/score/states.h>
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#include <rtems/score/thread.h>
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#include <rtems/score/thread.h>
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#include <rtems/score/wkspace.h>
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#include <rtems/score/wkspace.h>
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#if defined(RTEMS_MULTIPROCESSING)
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#if defined(RTEMS_MULTIPROCESSING)
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#include <rtems/score/mpci.h>
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#include <rtems/score/mpci.h>
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#endif
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#endif
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#include <rtems/rtems/status.h>
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#include <rtems/rtems/status.h>
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#include <rtems/rtems/attr.h>
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#include <rtems/rtems/attr.h>
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#include <rtems/rtems/message.h>
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#include <rtems/rtems/message.h>
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#include <rtems/rtems/options.h>
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#include <rtems/rtems/options.h>
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#include <rtems/rtems/support.h>
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#include <rtems/rtems/support.h>
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/*PAGE
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/*PAGE
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*
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*
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* rtems_message_queue_get_number_pending
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* rtems_message_queue_get_number_pending
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*
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*
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* This directive returns the number of messages pending.
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* This directive returns the number of messages pending.
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*
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*
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* Input parameters:
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* Input parameters:
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* id - queue id
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* id - queue id
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* count - return area for count
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* count - return area for count
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*
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*
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* Output parameters:
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* Output parameters:
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* count - number of messages removed ( 0 = empty queue )
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* count - number of messages removed ( 0 = empty queue )
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* RTEMS_SUCCESSFUL - if successful
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* RTEMS_SUCCESSFUL - if successful
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* error code - if unsuccessful
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* error code - if unsuccessful
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*/
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*/
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rtems_status_code rtems_message_queue_get_number_pending(
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rtems_status_code rtems_message_queue_get_number_pending(
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Objects_Id id,
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Objects_Id id,
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unsigned32 *count
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unsigned32 *count
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)
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)
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{
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{
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register Message_queue_Control *the_message_queue;
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register Message_queue_Control *the_message_queue;
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Objects_Locations location;
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Objects_Locations location;
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the_message_queue = _Message_queue_Get( id, &location );
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the_message_queue = _Message_queue_Get( id, &location );
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switch ( location ) {
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switch ( location ) {
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case OBJECTS_REMOTE:
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case OBJECTS_REMOTE:
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#if defined(RTEMS_MULTIPROCESSING)
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#if defined(RTEMS_MULTIPROCESSING)
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_Thread_Executing->Wait.return_argument = count;
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_Thread_Executing->Wait.return_argument = count;
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return _Message_queue_MP_Send_request_packet(
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return _Message_queue_MP_Send_request_packet(
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MESSAGE_QUEUE_MP_GET_NUMBER_PENDING_REQUEST,
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MESSAGE_QUEUE_MP_GET_NUMBER_PENDING_REQUEST,
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id,
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id,
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0, /* buffer not used */
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0, /* buffer not used */
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0, /* size */
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0, /* size */
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0, /* option_set not used */
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0, /* option_set not used */
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MPCI_DEFAULT_TIMEOUT
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MPCI_DEFAULT_TIMEOUT
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);
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);
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#endif
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#endif
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case OBJECTS_ERROR:
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case OBJECTS_ERROR:
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return RTEMS_INVALID_ID;
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return RTEMS_INVALID_ID;
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case OBJECTS_LOCAL:
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case OBJECTS_LOCAL:
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*count = the_message_queue->message_queue.number_of_pending_messages;
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*count = the_message_queue->message_queue.number_of_pending_messages;
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_Thread_Enable_dispatch();
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_Thread_Enable_dispatch();
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return RTEMS_SUCCESSFUL;
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return RTEMS_SUCCESSFUL;
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}
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}
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return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */
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return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */
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}
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}
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