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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [sapi/] [src/] [extension.c] - Rev 173
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/* * Extension Manager * * * COPYRIGHT (c) 1989-1999. * On-Line Applications Research Corporation (OAR). * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.OARcorp.com/rtems/license.html. * * $Id: extension.c,v 1.2 2001-09-27 11:59:20 chris Exp $ */ #include <rtems/system.h> #include <rtems/rtems/support.h> #include <rtems/score/object.h> #include <rtems/score/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 */ }