source: rtems/cpukit/rtems/src/dpmemcreate.c @ 23fec9f

4.11
Last change on this file since 23fec9f was 23fec9f, checked in by Sebastian Huber <sebastian.huber@…>, on Mar 27, 2014 at 1:16:12 PM

score: PR2152: Use allocator mutex for objects

Use allocator mutex for objects allocate/free. This prevents that the
thread dispatch latency depends on the workspace/heap fragmentation.

  • Property mode set to 100644
File size: 1.5 KB
Line 
1/**
2 *  @file
3 *
4 *  @brief RTEMS Create Port
5 *  @ingroup ClassicDPMEM
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/rtems/status.h>
23#include <rtems/rtems/support.h>
24#include <rtems/score/address.h>
25#include <rtems/rtems/dpmemimpl.h>
26#include <rtems/score/thread.h>
27
28rtems_status_code rtems_port_create(
29  rtems_name    name,
30  void         *internal_start,
31  void         *external_start,
32  uint32_t      length,
33  rtems_id     *id
34)
35{
36  Dual_ported_memory_Control *the_port;
37
38  if ( !rtems_is_name_valid( name ) )
39    return RTEMS_INVALID_NAME;
40
41  if ( !id )
42    return RTEMS_INVALID_ADDRESS;
43
44  if ( !_Addresses_Is_aligned( internal_start ) ||
45       !_Addresses_Is_aligned( external_start ) )
46    return RTEMS_INVALID_ADDRESS;
47
48  the_port = _Dual_ported_memory_Allocate();
49
50  if ( !the_port ) {
51    _Objects_Allocator_unlock();
52    return RTEMS_TOO_MANY;
53  }
54
55  the_port->internal_base = internal_start;
56  the_port->external_base = external_start;
57  the_port->length        = length - 1;
58
59  _Objects_Open(
60    &_Dual_ported_memory_Information,
61    &the_port->Object,
62    (Objects_Name) name
63  );
64
65  *id = the_port->Object.id;
66  _Objects_Allocator_unlock();
67  return RTEMS_SUCCESSFUL;
68}
Note: See TracBrowser for help on using the repository browser.