source: rtems/cpukit/rtems/src/msgqcreate.c @ 1e1a91e

Last change on this file since 1e1a91e was 1e1a91e, checked in by Sebastian Huber <sebastian.huber@…>, on Mar 23, 2016 at 9:01:31 AM

score: Remove Thread_queue_Queue::operations field

Remove the Thread_queue_Queue::operations field to reduce the size of
this structure. Add a thread queue operations parameter to the
_Thread_queue_First(), _Thread_queue_First_locked(),
_Thread_queue_Enqueue(), _Thread_queue_Dequeue() and
_Thread_queue_Flush() functions. This is a preparation patch to reduce
the size of several synchronization objects.

  • Property mode set to 100644
File size: 3.5 KB
Line 
1/**
2 *  @file
3 *
4 *  @brief RTEMS Create Message Queue
5 *  @ingroup ClassicMessageQueue
6 */
7
8/*
9 *  COPYRIGHT (c) 1989-2014.
10 *  On-Line Applications Research Corporation (OAR).
11 *
12 *  The license and distribution terms for this file may be
13 *  found in the file LICENSE in this distribution or at
14 *  http://www.rtems.org/license/LICENSE.
15 */
16
17#if HAVE_CONFIG_H
18#include "config.h"
19#endif
20
21#include <rtems/system.h>
22#include <rtems/score/sysstate.h>
23#include <rtems/score/chain.h>
24#include <rtems/score/isr.h>
25#include <rtems/score/coremsgimpl.h>
26#include <rtems/score/thread.h>
27#include <rtems/score/wkspace.h>
28#include <rtems/rtems/status.h>
29#include <rtems/rtems/attrimpl.h>
30#include <rtems/rtems/messageimpl.h>
31#include <rtems/rtems/options.h>
32#include <rtems/rtems/support.h>
33
34rtems_status_code rtems_message_queue_create(
35  rtems_name       name,
36  uint32_t         count,
37  size_t           max_message_size,
38  rtems_attribute  attribute_set,
39  rtems_id        *id
40)
41{
42  Message_queue_Control          *the_message_queue;
43  CORE_message_queue_Disciplines  discipline;
44#if defined(RTEMS_MULTIPROCESSING)
45  bool                            is_global;
46#endif
47
48  if ( !rtems_is_name_valid( name ) )
49    return RTEMS_INVALID_NAME;
50
51  if ( !id )
52    return RTEMS_INVALID_ADDRESS;
53
54#if defined(RTEMS_MULTIPROCESSING)
55  if ( (is_global = _Attributes_Is_global( attribute_set ) ) &&
56       !_System_state_Is_multiprocessing )
57    return RTEMS_MP_NOT_CONFIGURED;
58#endif
59
60  if ( count == 0 )
61      return RTEMS_INVALID_NUMBER;
62
63  if ( max_message_size == 0 )
64      return RTEMS_INVALID_SIZE;
65
66#if defined(RTEMS_MULTIPROCESSING)
67#if 1
68  /*
69   * I am not 100% sure this should be an error.
70   * It seems reasonable to create a que with a large max size,
71   * and then just send smaller msgs from remote (or all) nodes.
72   */
73  if ( is_global ) {
74    size_t max_packet_payload_size = _MPCI_table->maximum_packet_size
75      - MESSAGE_QUEUE_MP_PACKET_SIZE;
76
77    if ( max_message_size > max_packet_payload_size ) {
78      return RTEMS_INVALID_SIZE;
79    }
80  }
81#endif
82#endif
83
84  the_message_queue = _Message_queue_Allocate();
85
86  if ( !the_message_queue ) {
87    _Objects_Allocator_unlock();
88    return RTEMS_TOO_MANY;
89  }
90
91#if defined(RTEMS_MULTIPROCESSING)
92  if ( is_global &&
93    !( _Objects_MP_Allocate_and_open( &_Message_queue_Information,
94                              name, the_message_queue->Object.id, false ) ) ) {
95    _Message_queue_Free( the_message_queue );
96    _Objects_Allocator_unlock();
97    return RTEMS_TOO_MANY;
98  }
99#endif
100
101  the_message_queue->attribute_set = attribute_set;
102
103  if (_Attributes_Is_priority( attribute_set ) )
104    discipline = CORE_MESSAGE_QUEUE_DISCIPLINES_PRIORITY;
105  else
106    discipline = CORE_MESSAGE_QUEUE_DISCIPLINES_FIFO;
107
108  if ( ! _CORE_message_queue_Initialize(
109           &the_message_queue->message_queue,
110           discipline,
111           count,
112           max_message_size
113         ) ) {
114#if defined(RTEMS_MULTIPROCESSING)
115    if ( is_global )
116        _Objects_MP_Close(
117          &_Message_queue_Information, the_message_queue->Object.id);
118#endif
119
120    _Message_queue_Free( the_message_queue );
121    _Objects_Allocator_unlock();
122    return RTEMS_UNSATISFIED;
123  }
124
125  _Objects_Open(
126    &_Message_queue_Information,
127    &the_message_queue->Object,
128    (Objects_Name) name
129  );
130
131  *id = the_message_queue->Object.id;
132
133#if defined(RTEMS_MULTIPROCESSING)
134  if ( is_global )
135    _Message_queue_MP_Send_process_packet(
136      MESSAGE_QUEUE_MP_ANNOUNCE_CREATE,
137      the_message_queue->Object.id,
138      name,
139      0
140    );
141#endif
142
143  _Objects_Allocator_unlock();
144  return RTEMS_SUCCESSFUL;
145}
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