forked from Imagelibrary/rtems
47a3cd8f73
The work areas (RTEMS work space and C program heap) will be initialized now in a separate step and are no longer part of rtems_initialize_data_structures(). Initialization is performed with tables of Heap_Area entries. This allows usage of scattered memory areas present on various small scale micro-controllers. The sbrk() support API changes also. The bsp_sbrk_init() must now deal with a minimum size for the first memory chunk to take the configured work space size into account.
81 lines
1.6 KiB
C
81 lines
1.6 KiB
C
/*
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* RTEMS Malloc Family Implementation
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*
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*
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* COPYRIGHT (c) 1989-2007.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.com/license/LICENSE.
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef RTEMS_NEWLIB
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#include <stdlib.h>
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#include <errno.h>
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#include "malloc_p.h"
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void *malloc(
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size_t size
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)
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{
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void *return_this;
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MSBUMP(malloc_calls, 1);
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/*
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* If some free's have been deferred, then do them now.
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*/
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malloc_deferred_frees_process();
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/*
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* Validate the parameters
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*/
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if ( !size )
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return (void *) 0;
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/*
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* Do not attempt to allocate memory if not in correct system state.
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*/
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if ( _System_state_Is_up(_System_state_Get()) &&
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!malloc_is_system_state_OK() )
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return NULL;
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/*
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* Try to give a segment in the current heap if there is not
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* enough space then try to grow the heap.
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* If this fails then return a NULL pointer.
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*/
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return_this = _Protected_heap_Allocate( RTEMS_Malloc_Heap, size );
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if ( !return_this ) {
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return_this = (*rtems_malloc_extend_handler)( RTEMS_Malloc_Heap, size );
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if ( !return_this ) {
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errno = ENOMEM;
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return (void *) 0;
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}
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}
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/*
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* If the user wants us to dirty the allocated memory, then do it.
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*/
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if ( rtems_malloc_dirty_helper )
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(*rtems_malloc_dirty_helper)( return_this, size );
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/*
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* If configured, update the statistics
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*/
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if ( rtems_malloc_statistics_helpers )
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(*rtems_malloc_statistics_helpers->at_malloc)(return_this);
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return return_this;
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}
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#endif
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