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/**
* @file
*
* @brief Allocate Object
* @ingroup ScoreObject
*/
/*
* 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.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/objectimpl.h>
#include <rtems/score/assert.h>
#include <rtems/score/chainimpl.h>
#include <rtems/score/sysstate.h>
static Objects_Control *_Objects_Get_inactive(
Objects_Information *information
)
{
return (Objects_Control *) _Chain_Get_unprotected( &information->Inactive );
}
Objects_Control *_Objects_Allocate_unprotected(
Objects_Information *information
)
{
Objects_Control *the_object;
_Assert(
_Objects_Allocator_is_owner()
|| !_System_state_Is_up( _System_state_Get() )
);
/*
* If the application is using the optional manager stubs and
* still attempts to create the object, the information block
* should be all zeroed out because it is in the BSS. So let's
* check that code for this manager is even present.
*/
if ( information->object_size == 0 )
return NULL;
/*
* OK. The manager should be initialized and configured to have objects.
* With any luck, it is safe to attempt to allocate an object.
*/
the_object = _Objects_Get_inactive( information );
if ( information->auto_extend ) {
/*
* If the list is empty then we are out of objects and need to
* extend information base.
*/
if ( the_object == NULL ) {
_Objects_Extend_information( information );
the_object = _Objects_Get_inactive( information );
}
if ( the_object != NULL ) {
Objects_Maximum block;
block = _Objects_Get_index( the_object->id ) - OBJECTS_INDEX_MINIMUM;
block /= information->objects_per_block;
information->inactive_per_block[ block ]--;
information->inactive--;
}
}
return the_object;
}
Objects_Control *_Objects_Allocate( Objects_Information *information )
{
_RTEMS_Lock_allocator();
return _Objects_Allocate_unprotected( information );
}
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