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/*
* Object Handler Initialization per Object Class
*
* COPYRIGHT (c) 1989-2011.
* 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.rtems.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/system.h>
#include <rtems/score/address.h>
#include <rtems/score/chain.h>
#include <rtems/score/object.h>
#if defined(RTEMS_MULTIPROCESSING)
#include <rtems/score/objectmp.h>
#endif
#include <rtems/score/thread.h>
#include <rtems/score/wkspace.h>
#include <rtems/score/sysstate.h>
#include <rtems/score/isr.h>
/*PAGE
*
* _Objects_Initialize_information
*
* This routine initializes all object information related data structures.
*
* Input parameters:
* information - object information table
* maximum - maximum objects of this class
* size - size of this object's control block
* is_string - true if names for this object are strings
* maximum_name_length - maximum length of each object's name
* When multiprocessing is configured,
* supports_global - true if this is a global object class
* extract_callout - pointer to threadq extract callout
*
* Output parameters: NONE
*/
void _Objects_Initialize_information(
Objects_Information *information,
Objects_APIs the_api,
uint16_t the_class,
uint32_t maximum,
uint16_t size,
bool is_string,
uint32_t maximum_name_length
#if defined(RTEMS_MULTIPROCESSING)
,
bool supports_global,
Objects_Thread_queue_Extract_callout extract
#endif
)
{
static Objects_Control *null_local_table = NULL;
uint32_t minimum_index;
uint32_t name_length;
uint32_t maximum_per_allocation;
#if defined(RTEMS_MULTIPROCESSING)
uint32_t index;
#endif
information->the_api = the_api;
information->the_class = the_class;
information->size = size;
information->local_table = 0;
information->inactive_per_block = 0;
information->object_blocks = 0;
information->inactive = 0;
#if defined(RTEMS_SCORE_OBJECT_ENABLE_STRING_NAMES)
information->is_string = is_string;
#endif
/*
* Set the maximum value to 0. It will be updated when objects are
* added to the inactive set from _Objects_Extend_information()
*/
information->maximum = 0;
/*
* Register this Object Class in the Object Information Table.
*/
_Objects_Information_table[ the_api ][ the_class ] = information;
/*
* Are we operating in limited or unlimited (e.g. auto-extend) mode.
*/
information->auto_extend =
(maximum & OBJECTS_UNLIMITED_OBJECTS) ? true : false;
maximum_per_allocation = maximum & ~OBJECTS_UNLIMITED_OBJECTS;
/*
* Unlimited and maximum of zero is illogical.
*/
if ( information->auto_extend && maximum_per_allocation == 0) {
_Internal_error_Occurred(
INTERNAL_ERROR_CORE,
true,
INTERNAL_ERROR_UNLIMITED_AND_MAXIMUM_IS_0
);
}
/*
* The allocation unit is the maximum value
*/
information->allocation_size = maximum_per_allocation;
/*
* Provide a null local table entry for the case of any empty table.
*/
information->local_table = &null_local_table;
/*
* Calculate minimum and maximum Id's
*/
minimum_index = (maximum_per_allocation == 0) ? 0 : 1;
information->minimum_id =
_Objects_Build_id( the_api, the_class, _Objects_Local_node, minimum_index );
/*
* Calculate the maximum name length
*
* NOTE: Always 4 bytes long in Class so aligned. It is POSIX name
* lengths that may be an odd number of bytes.
*/
name_length = maximum_name_length;
#if defined(RTEMS_POSIX_API)
if ( name_length & (OBJECTS_NAME_ALIGNMENT-1) )
name_length = (name_length + OBJECTS_NAME_ALIGNMENT) &
~(OBJECTS_NAME_ALIGNMENT-1);
#endif
information->name_length = name_length;
_Chain_Initialize_empty( &information->Inactive );
/*
* Initialize objects .. if there are any
*/
if ( maximum_per_allocation ) {
/*
* Always have the maximum size available so the current performance
* figures are create are met. If the user moves past the maximum
* number then a performance hit is taken.
*/
_Objects_Extend_information( information );
}
/*
* Take care of multiprocessing
*/
#if defined(RTEMS_MULTIPROCESSING)
information->extract = extract;
if ( (supports_global == true) && _System_state_Is_multiprocessing ) {
information->global_table =
(Chain_Control *) _Workspace_Allocate_or_fatal_error(
(_Objects_Maximum_nodes + 1) * sizeof(Chain_Control)
);
for ( index=1; index <= _Objects_Maximum_nodes ; index++ )
_Chain_Initialize_empty( &information->global_table[ index ] );
}
else
information->global_table = NULL;
#endif
}
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