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/*
* RTEMS Malloc Family Implementation
*
*
* COPYRIGHT (c) 1989-2007.
* 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.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef RTEMS_NEWLIB
#include <stdlib.h>
#include <errno.h>
#include "malloc_p.h"
void *malloc(
size_t size
)
{
void *return_this;
MSBUMP(malloc_calls, 1);
/*
* If some free's have been deferred, then do them now.
*/
malloc_deferred_frees_process();
/*
* Validate the parameters
*/
if ( !size )
return (void *) 0;
/*
* Do not attempt to allocate memory if not in correct system state.
*/
if ( _System_state_Is_up(_System_state_Get()) &&
!malloc_is_system_state_OK() )
return NULL;
/*
* Try to give a segment in the current heap if there is not
* enough space then try to grow the heap.
* If this fails then return a NULL pointer.
*/
return_this = _Protected_heap_Allocate( RTEMS_Malloc_Heap, size );
if ( !return_this ) {
return_this = (*rtems_malloc_extend_handler)( RTEMS_Malloc_Heap, size );
if ( !return_this ) {
errno = ENOMEM;
return (void *) 0;
}
}
/*
* If the user wants us to dirty the allocated memory, then do it.
*/
if ( rtems_malloc_dirty_helper )
(*rtems_malloc_dirty_helper)( return_this, size );
/*
* If configured, update the statistics
*/
if ( rtems_malloc_statistics_helpers )
(*rtems_malloc_statistics_helpers->at_malloc)(return_this);
return return_this;
}
#endif
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