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/**
* @file
*
* @ingroup RTEMSImplClassicPartition
*
* @brief This source file contains the implementation of
* rtems_partition_get_buffer().
*/
/*
* COPYRIGHT (c) 1989-2014.
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/rtems/partimpl.h>
#include <rtems/score/chainimpl.h>
static void *_Partition_Allocate_buffer( Partition_Control *the_partition )
{
return _Chain_Get_unprotected( &the_partition->Memory );
}
rtems_status_code rtems_partition_get_buffer(
rtems_id id,
void **buffer
)
{
Partition_Control *the_partition;
ISR_lock_Context lock_context;
void *the_buffer;
if ( buffer == NULL ) {
return RTEMS_INVALID_ADDRESS;
}
the_partition = _Partition_Get( id, &lock_context );
if ( the_partition == NULL ) {
#if defined(RTEMS_MULTIPROCESSING)
return _Partition_MP_Get_buffer( id, buffer );
#else
return RTEMS_INVALID_ID;
#endif
}
_Partition_Acquire_critical( the_partition, &lock_context );
the_buffer = _Partition_Allocate_buffer( the_partition );
if ( the_buffer == NULL ) {
_Partition_Release( the_partition, &lock_context );
return RTEMS_UNSATISFIED;
}
the_partition->number_of_used_blocks += 1;
_Partition_Release( the_partition, &lock_context );
*buffer = the_buffer;
return RTEMS_SUCCESSFUL;
}
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