forked from Imagelibrary/rtems
d8a5e140ec
Move rtems_calloc() since it only depends on rtems_malloc(). This may make it easier to customize the heap allocator. Change licence to BSD-2-Clause according to file history. Update #3053.
116 lines
2.5 KiB
C
116 lines
2.5 KiB
C
/**
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* @file
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*
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* @brief Malloc Deferred Support
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* @ingroup libcsupport
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*/
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/*
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* Process free requests deferred because they were from ISR
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* or other critical section.
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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.org/license/LICENSE.
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*/
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#ifdef 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 <string.h>
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#include "malloc_p.h"
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#include <rtems/score/sysstate.h>
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#include <rtems/score/threaddispatch.h>
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Malloc_System_state _Malloc_System_state( void )
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{
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System_state_Codes state = _System_state_Get();
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if ( _System_state_Is_up( state ) ) {
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if ( _Thread_Dispatch_is_enabled() ) {
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return MALLOC_SYSTEM_STATE_NORMAL;
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} else {
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return MALLOC_SYSTEM_STATE_NO_ALLOCATION;
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}
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} else if ( _System_state_Is_before_multitasking( state ) ) {
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return MALLOC_SYSTEM_STATE_NORMAL;
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} else {
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return MALLOC_SYSTEM_STATE_NO_PROTECTION;
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}
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}
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RTEMS_WEAK void _Malloc_Process_deferred_frees( void )
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{
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/*
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* Do nothing by default. If free() is used by the application, then a
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* strong implementation of this function will be provided.
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*/
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}
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void *rtems_heap_allocate_aligned_with_boundary(
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size_t size,
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uintptr_t alignment,
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uintptr_t boundary
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)
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{
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Heap_Control *heap = RTEMS_Malloc_Heap;
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void *p;
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switch ( _Malloc_System_state() ) {
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case MALLOC_SYSTEM_STATE_NORMAL:
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_RTEMS_Lock_allocator();
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_Malloc_Process_deferred_frees();
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p = _Heap_Allocate_aligned_with_boundary(
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heap,
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size,
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alignment,
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boundary
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);
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_RTEMS_Unlock_allocator();
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break;
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case MALLOC_SYSTEM_STATE_NO_PROTECTION:
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p = _Heap_Allocate_aligned_with_boundary(
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heap,
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size,
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alignment,
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boundary
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);
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break;
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default:
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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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return NULL;
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}
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if ( p == NULL && alignment == 0 && boundary == 0 ) {
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p = (*rtems_malloc_extend_handler)( heap, size );
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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 ( p != NULL && rtems_malloc_dirty_helper != NULL )
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(*rtems_malloc_dirty_helper)( p, size );
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return p;
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}
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void *rtems_malloc( size_t size )
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{
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if ( size == 0 ) {
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return NULL;
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}
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return rtems_heap_allocate_aligned_with_boundary( size, 0, 0 );
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}
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#endif
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