source: rtems/cpukit/sapi/src/extension.c @ 5250ff39

4.104.114.84.95
Last change on this file since 5250ff39 was 5250ff39, checked in by Joel Sherrill <joel.sherrill@…>, on Aug 23, 1995 at 9:06:31 PM

Moved _Thread_Information -> _RTEMS_tasks_Information.

Added a table of object information control blocks.

Modified _Thread_Get so it looks up a thread regardless of which
thread management "entity" (manager, internal, etc) actually "owns" it.

  • Property mode set to 100644
File size: 3.7 KB
Line 
1/*
2 *  Extension Manager
3 *
4 *
5 *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
6 *  On-Line Applications Research Corporation (OAR).
7 *  All rights assigned to U.S. Government, 1994.
8 *
9 *  This material may be reproduced by or for the U.S. Government pursuant
10 *  to the copyright license under the clause at DFARS 252.227-7013.  This
11 *  notice must appear in all copies of this file and its derivatives.
12 *
13 *  $Id$
14 */
15
16#include <rtems/system.h>
17#include <rtems/support.h>
18#include <rtems/object.h>
19#include <rtems/thread.h>
20#include <rtems/extension.h>
21
22/*PAGE
23 *
24 *  _Extension_Manager_initialization
25 *
26 *  This routine initializes all extension manager related data structures.
27 *
28 *  Input parameters:
29 *    maximum_extensions - number of extensions to initialize
30 *
31 *  Output parameters:  NONE
32 */
33
34void _Extension_Manager_initialization(
35  unsigned32 maximum_extensions
36)
37{
38  _Objects_Initialize_information(
39    &_Extension_Information,
40    OBJECTS_RTEMS_EXTENSIONS,
41    FALSE,
42    maximum_extensions,
43    sizeof( Extension_Control ),
44    FALSE,
45    RTEMS_MAXIMUM_NAME_LENGTH,
46    FALSE
47  );
48}
49
50/*PAGE
51 *
52 *  rtems_extension_create
53 *
54 *  This directive creates a extension and performs some initialization.
55 *
56 *  Input parameters:
57 *    name            - extension name
58 *    extension_table - pointer to extension set information
59 *    id              - pointer to extension id
60 *
61 *  Output parameters:
62 *    id                - extension id
63 *    RTEMS_SUCCESSFUL - if successful
64 *    error code        - if unsuccessful
65 */
66
67rtems_status_code rtems_extension_create(
68  rtems_name                     name,
69  rtems_extensions_table *extension_table,
70  Objects_Id                    *id
71)
72{
73  Extension_Control *the_extension;
74
75  if ( !rtems_is_name_valid( name ) )
76    return ( RTEMS_INVALID_NAME );
77
78  _Thread_Disable_dispatch();         /* to prevent deletion */
79
80  the_extension = _Extension_Allocate();
81
82  if ( !the_extension ) {
83    _Thread_Enable_dispatch();
84    return( RTEMS_TOO_MANY );
85  }
86
87  _User_extensions_Add_set( &the_extension->Extension, extension_table );
88
89  _Objects_Open( &_Extension_Information, &the_extension->Object, &name );
90
91  *id = the_extension->Object.id;
92  _Thread_Enable_dispatch();
93  return( RTEMS_SUCCESSFUL );
94}
95
96/*PAGE
97 *
98 *  rtems_extension_ident
99 *
100 *  This directive returns the system ID associated with
101 *  the extension name.
102 *
103 *  Input parameters:
104 *    name - user defined message queue name
105 *    id   - pointer to extension id
106 *
107 *  Output parameters:
108 *    *id               - message queue id
109 *    RTEMS_SUCCESSFUL - if successful
110 *    error code        - if unsuccessful
111 */
112
113rtems_status_code rtems_extension_ident(
114  rtems_name    name,
115  Objects_Id   *id
116)
117{
118  return _Objects_Name_to_id(
119    &_Extension_Information,
120    &name,
121    RTEMS_SEARCH_LOCAL_NODE,
122    id
123  );
124}
125
126/*PAGE
127 *
128 *  rtems_extension_delete
129 *
130 *  This directive allows a thread to delete a extension.
131 *
132 *  Input parameters:
133 *    id - extension id
134 *
135 *  Output parameters:
136 *    RTEMS_SUCCESSFUL - if successful
137 *    error code - if unsuccessful
138 */
139
140rtems_status_code rtems_extension_delete(
141  Objects_Id id
142)
143{
144  Extension_Control   *the_extension;
145  Objects_Locations    location;
146
147  the_extension = _Extension_Get( id, &location );
148  switch ( location ) {
149    case OBJECTS_ERROR:
150    case OBJECTS_REMOTE:            /* should never return this */
151      return( RTEMS_INVALID_ID );
152    case OBJECTS_LOCAL:
153      _User_extensions_Remove_set( &the_extension->Extension );
154      _Objects_Close( &_Extension_Information, &the_extension->Object );
155      _Extension_Free( the_extension );
156      _Thread_Enable_dispatch();
157      return( RTEMS_SUCCESSFUL );
158  }
159
160  return( RTEMS_INTERNAL_ERROR );   /* unreached - only to remove warnings */
161}
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