/*
* 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/rtems/support.h>
#include <rtems/core/object.h>
#include <rtems/core/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,
OBJECTS_RTEMS_EXTENSIONS,
FALSE,
maximum_extensions,
sizeof( Extension_Control ),
FALSE,
RTEMS_MAXIMUM_NAME_LENGTH,
FALSE
);
}
/*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(
rtems_name name,
rtems_extensions_table *extension_table,
Objects_Id *id
)
{
Extension_Control *the_extension;
if ( !rtems_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(
rtems_name name,
Objects_Id *id
)
{
Objects_Name_to_id_errors status;
status = _Objects_Name_to_id(
&_Extension_Information,
&name,
OBJECTS_SEARCH_LOCAL_NODE,
id
);
return _Status_Object_name_errors_to_status[ status ];
}
/*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 */
}
