OpenCores
URL https://opencores.org/ocsvn/openrisc_me/openrisc_me/trunk

Subversion Repositories openrisc_me

[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [score/] [src/] [coremsginsert.c] - Blame information for rev 173

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 30 unneback
/*
2
 *  CORE Message Queue Handler
3
 *
4
 *  DESCRIPTION:
5
 *
6
 *  This package is the implementation of the CORE Message Queue Handler.
7
 *  This core object provides task synchronization and communication functions
8
 *  via messages passed to queue objects.
9
 *
10
 *  COPYRIGHT (c) 1989-1999.
11
 *  On-Line Applications Research Corporation (OAR).
12
 *
13
 *  The license and distribution terms for this file may be
14
 *  found in the file LICENSE in this distribution or at
15
 *  http://www.OARcorp.com/rtems/license.html.
16
 *
17
 *  $Id: coremsginsert.c,v 1.2 2001-09-27 11:59:34 chris Exp $
18
 */
19
 
20
#include <rtems/system.h>
21
#include <rtems/score/chain.h>
22
#include <rtems/score/isr.h>
23
#include <rtems/score/object.h>
24
#include <rtems/score/coremsg.h>
25
#include <rtems/score/states.h>
26
#include <rtems/score/thread.h>
27
#include <rtems/score/wkspace.h>
28
#if defined(RTEMS_MULTIPROCESSING)
29
#include <rtems/score/mpci.h>
30
#endif
31
 
32
/*PAGE
33
 *
34
 *  _CORE_message_queue_Insert_message
35
 *
36
 *  This kernel routine inserts the specified message into the
37
 *  message queue.  It is assumed that the message has been filled
38
 *  in before this routine is called.
39
 *
40
 *  Input parameters:
41
 *    the_message_queue - pointer to message queue
42
 *    the_message       - message to insert
43
 *    priority          - insert indication
44
 *
45
 *  Output parameters:  NONE
46
 *
47
 *  INTERRUPT LATENCY:
48
 *    insert
49
 */
50
 
51
void _CORE_message_queue_Insert_message(
52
  CORE_message_queue_Control        *the_message_queue,
53
  CORE_message_queue_Buffer_control *the_message,
54
  CORE_message_queue_Submit_types    submit_type
55
)
56
{
57
  the_message_queue->number_of_pending_messages += 1;
58
 
59
  the_message->priority = submit_type;
60
 
61
  switch ( submit_type ) {
62
    case CORE_MESSAGE_QUEUE_SEND_REQUEST:
63
      _CORE_message_queue_Append( the_message_queue, the_message );
64
      break;
65
    case CORE_MESSAGE_QUEUE_URGENT_REQUEST:
66
      _CORE_message_queue_Prepend( the_message_queue, the_message );
67
      break;
68
    default:
69
      /* XXX interrupt critical section needs to be addressed */
70
      {
71
        CORE_message_queue_Buffer_control *this_message;
72
        Chain_Node                        *the_node;
73
        Chain_Control                     *the_header;
74
 
75
        the_header = &the_message_queue->Pending_messages;
76
        the_node = the_header->first;
77
        while ( !_Chain_Is_tail( the_header, the_node ) ) {
78
 
79
          this_message = (CORE_message_queue_Buffer_control *) the_node;
80
 
81
          if ( this_message->priority <= the_message->priority ) {
82
            the_node = the_node->next;
83
            continue;
84
          }
85
 
86
          break;
87
        }
88
        _Chain_Insert( the_node->previous, &the_message->Node );
89
      }
90
      break;
91
  }
92
 
93
  /*
94
   *  According to POSIX, does this happen before or after the message
95
   *  is actually enqueued.  It is logical to think afterwards, because
96
   *  the message is actually in the queue at this point.
97
   */
98
 
99
  if ( the_message_queue->number_of_pending_messages == 1 &&
100
       the_message_queue->notify_handler )
101
    (*the_message_queue->notify_handler)( the_message_queue->notify_argument );
102
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.