source: rtems/cpukit/rtems/src/dpmemcreate.c @ e980b219

4.104.114.84.95
Last change on this file since e980b219 was e980b219, checked in by Joel Sherrill <joel.sherrill@…>, on 05/06/04 at 19:21:40

2004-05-06 Joel Sherrill <joel@…>

PR 618/rtems

  • rtems/include/rtems/rtems/status.h, rtems/src/clockget.c, rtems/src/clockset.c, rtems/src/dpmemcreate.c, rtems/src/dpmemexternal2internal.c, rtems/src/dpmeminternal2external.c, rtems/src/eventmp.c, rtems/src/eventreceive.c, rtems/src/eventsend.c, rtems/src/msgqbroadcast.c, rtems/src/msgqcreate.c, rtems/src/msgqflush.c, rtems/src/msgqgetnumberpending.c, rtems/src/msgqreceive.c, rtems/src/msgqsubmit.c, rtems/src/partcreate.c, rtems/src/partdelete.c, rtems/src/partgetbuffer.c, rtems/src/ratemoncancel.c, rtems/src/ratemoncreate.c, rtems/src/ratemondelete.c, rtems/src/ratemongetstatus.c, rtems/src/ratemonident.c, rtems/src/ratemonperiod.c, rtems/src/regioncreate.c, rtems/src/regiondelete.c, rtems/src/regionextend.c, rtems/src/regiongetsegment.c, rtems/src/regiongetsegmentsize.c, rtems/src/regionreturnsegment.c, rtems/src/semcreate.c, rtems/src/semdelete.c, rtems/src/semflush.c, rtems/src/semident.c, rtems/src/taskcreate.c, rtems/src/taskgetnote.c, rtems/src/taskmode.c, rtems/src/taskrestart.c, rtems/src/taskresume.c, rtems/src/tasksetnote.c, rtems/src/tasksuspend.c, rtems/src/taskvariableadd.c, rtems/src/taskvariabledelete.c, rtems/src/taskvariableget.c, rtems/src/taskwakewhen.c, rtems/src/timercreate.c, rtems/src/timerdelete.c, rtems/src/timerfireafter.c, rtems/src/timerfirewhen.c, rtems/src/timerserverfireafter.c, rtems/src/timerserverfirewhen.c, score/include/rtems/score/object.h, score/src/coretodvalidate.c, score/src/objectnametoid.c: Add NULL checks.
  • Property mode set to 100644
File size: 2.0 KB
Line 
1/*
2 *  Dual Port Memory Manager
3 *
4 *  COPYRIGHT (c) 1989-1999.
5 *  On-Line Applications Research Corporation (OAR).
6 *
7 *  The license and distribution terms for this file may be
8 *  found in the file LICENSE in this distribution or at
9 *  http://www.rtems.com/license/LICENSE.
10 *
11 *  $Id$
12 */
13
14#include <rtems/system.h>
15#include <rtems/rtems/status.h>
16#include <rtems/rtems/support.h>
17#include <rtems/score/address.h>
18#include <rtems/rtems/dpmem.h>
19#include <rtems/score/object.h>
20#include <rtems/score/thread.h>
21#include <rtems/rtems/dpmem.h>
22
23/*PAGE
24 *
25 *  rtems_port_create
26 *
27 *  This directive creates a port into a dual-ported memory area.
28 *
29 *  Input parameters:
30 *    name           - user defined port name
31 *    internal_start - internal start address of port
32 *    external_start - external start address of port
33 *    length         - physical length in bytes
34 *    id             - address of port id to set
35 *
36 *  Output parameters:
37 *    id       - port id
38 *    RTEMS_SUCCESSFUL - if successful
39 *    error code - if unsuccessful
40 */
41
42rtems_status_code rtems_port_create(
43  rtems_name    name,
44  void         *internal_start,
45  void         *external_start,
46  uint32_t      length,
47  Objects_Id   *id
48)
49{
50  register Dual_ported_memory_Control *the_port;
51
52  if ( !rtems_is_name_valid( name) )
53    return RTEMS_INVALID_NAME;
54
55  if ( !id )
56    return RTEMS_INVALID_ADDRESS;
57
58  if ( !_Addresses_Is_aligned( internal_start ) ||
59       !_Addresses_Is_aligned( external_start ) )
60    return RTEMS_INVALID_ADDRESS;
61
62  _Thread_Disable_dispatch();             /* to prevent deletion */
63
64  the_port = _Dual_ported_memory_Allocate();
65
66  if ( !the_port ) {
67    _Thread_Enable_dispatch();
68    return RTEMS_TOO_MANY;
69  }
70
71  the_port->internal_base = internal_start;
72  the_port->external_base = external_start;
73  the_port->length        = length - 1;
74
75  _Objects_Open(
76    &_Dual_ported_memory_Information,
77    &the_port->Object,
78    (Objects_Name) name
79  );
80
81  *id = the_port->Object.id;
82  _Thread_Enable_dispatch();
83  return RTEMS_SUCCESSFUL;
84}
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