From ac7d5ef06a6d6e8d84abbd1f0b82162725f98326 Mon Sep 17 00:00:00 2001
From: Joel Sherrill <joel.sherrill@OARcorp.com>
Date: Thu, 11 May 1995 17:39:37 +0000
Subject: Initial revision

---
 cpukit/sapi/src/extension.c | 156 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 156 insertions(+)
 create mode 100644 cpukit/sapi/src/extension.c

(limited to 'cpukit/sapi/src/extension.c')

diff --git a/cpukit/sapi/src/extension.c b/cpukit/sapi/src/extension.c
new file mode 100644
index 0000000000..10c974ef8e
--- /dev/null
+++ b/cpukit/sapi/src/extension.c
@@ -0,0 +1,156 @@
+/*
+ *  Extension Manager
+ *
+ *
+ *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
+ *  On-Line Applications Research Corporation (OAR).
+ *  All rights assigned to U.S. Government, 1994.
+ *
+ *  This material may be reproduced by or for the U.S. Government pursuant
+ *  to the copyright license under the clause at DFARS 252.227-7013.  This
+ *  notice must appear in all copies of this file and its derivatives.
+ *
+ *  $Id$
+ */
+
+#include <rtems/system.h>
+#include <rtems/object.h>
+#include <rtems/thread.h>
+#include <rtems/extension.h>
+
+/*PAGE
+ *
+ *  _Extension_Manager_initialization
+ *
+ *  This routine initializes all extension manager related data structures.
+ *
+ *  Input parameters:
+ *    maximum_extensions - number of extensions to initialize
+ *
+ *  Output parameters:  NONE
+ */
+
+void _Extension_Manager_initialization(
+  unsigned32 maximum_extensions
+)
+{
+  _Objects_Initialize_information(
+     &_Extension_Information,
+     FALSE,
+     maximum_extensions,
+     sizeof( Extension_Control )
+  );
+}
+
+/*PAGE
+ *
+ *  rtems_extension_create
+ *
+ *  This directive creates a extension and performs some initialization.
+ *
+ *  Input parameters:
+ *    name            - extension name
+ *    extension_table - pointer to extension set information
+ *    id              - pointer to extension id
+ *
+ *  Output parameters:
+ *    id                - extension id
+ *    RTEMS_SUCCESSFUL - if successful
+ *    error code        - if unsuccessful
+ */
+
+rtems_status_code rtems_extension_create(
+  Objects_Name                   name,
+  rtems_extensions_table *extension_table,
+  Objects_Id                    *id
+)
+{
+  Extension_Control *the_extension;
+
+  if ( !_Objects_Is_name_valid( name ) )
+    return ( RTEMS_INVALID_NAME );
+
+  _Thread_Disable_dispatch();         /* to prevent deletion */
+
+  the_extension = _Extension_Allocate();
+
+  if ( !the_extension ) {
+    _Thread_Enable_dispatch();
+    return( RTEMS_TOO_MANY );
+  }
+
+  _User_extensions_Add_set( &the_extension->Extension, extension_table );
+
+  _Objects_Open( &_Extension_Information, &the_extension->Object, name );
+
+  *id = the_extension->Object.id;
+  _Thread_Enable_dispatch();
+  return( RTEMS_SUCCESSFUL );
+}
+
+/*PAGE
+ *
+ *  rtems_extension_ident
+ *
+ *  This directive returns the system ID associated with
+ *  the extension name.
+ *
+ *  Input parameters:
+ *    name - user defined message queue name
+ *    id   - pointer to extension id
+ *
+ *  Output parameters:
+ *    *id               - message queue id
+ *    RTEMS_SUCCESSFUL - if successful
+ *    error code        - if unsuccessful
+ */
+
+rtems_status_code rtems_extension_ident(
+  Objects_Name  name,
+  Objects_Id   *id
+)
+{
+  return _Objects_Name_to_id(
+    &_Extension_Information,
+    name,
+    RTEMS_SEARCH_LOCAL_NODE,
+    id
+  );
+}
+
+/*PAGE
+ *
+ *  rtems_extension_delete
+ *
+ *  This directive allows a thread to delete a extension.
+ *
+ *  Input parameters:
+ *    id - extension id
+ *
+ *  Output parameters:
+ *    RTEMS_SUCCESSFUL - if successful
+ *    error code - if unsuccessful
+ */
+
+rtems_status_code rtems_extension_delete(
+  Objects_Id id
+)
+{
+  Extension_Control   *the_extension;
+  Objects_Locations    location;
+
+  the_extension = _Extension_Get( id, &location );
+  switch ( location ) {
+    case OBJECTS_ERROR:
+    case OBJECTS_REMOTE:            /* should never return this */
+      return( RTEMS_INVALID_ID );
+    case OBJECTS_LOCAL:
+      _User_extensions_Remove_set( &the_extension->Extension );
+      _Objects_Close( &_Extension_Information, &the_extension->Object );
+      _Extension_Free( the_extension );
+      _Thread_Enable_dispatch();
+      return( RTEMS_SUCCESSFUL );
+  }
+
+  return( RTEMS_INTERNAL_ERROR );   /* unreached - only to remove warnings */
+}
-- 
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