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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @brief Malloc Deferred Support
* @ingroup libcsupport
*/
/*
* Process free requests deferred because they were from ISR
* or other critical section.
*
* COPYRIGHT (c) 1989-2007.
* On-Line Applications Research Corporation (OAR).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef RTEMS_NEWLIB
#include <stdlib.h>
#include <string.h>
#include "malloc_p.h"
#include <rtems/score/sysstate.h>
#include <rtems/score/threaddispatch.h>
Malloc_System_state _Malloc_System_state( void )
{
System_state_Codes state = _System_state_Get();
if ( _System_state_Is_up( state ) ) {
if ( _Thread_Dispatch_is_enabled() ) {
return MALLOC_SYSTEM_STATE_NORMAL;
} else {
return MALLOC_SYSTEM_STATE_NO_ALLOCATION;
}
} else if ( _System_state_Is_before_multitasking( state ) ) {
return MALLOC_SYSTEM_STATE_NORMAL;
} else {
return MALLOC_SYSTEM_STATE_NO_PROTECTION;
}
}
RTEMS_WEAK void _Malloc_Process_deferred_frees( void )
{
/*
* Do nothing by default. If free() is used by the application, then a
* strong implementation of this function will be provided.
*/
}
void *rtems_heap_allocate_aligned_with_boundary(
size_t size,
uintptr_t alignment,
uintptr_t boundary
)
{
Heap_Control *heap = RTEMS_Malloc_Heap;
void *p;
switch ( _Malloc_System_state() ) {
case MALLOC_SYSTEM_STATE_NORMAL:
_RTEMS_Lock_allocator();
_Malloc_Process_deferred_frees();
p = _Heap_Allocate_aligned_with_boundary(
heap,
size,
alignment,
boundary
);
_RTEMS_Unlock_allocator();
break;
case MALLOC_SYSTEM_STATE_NO_PROTECTION:
p = _Heap_Allocate_aligned_with_boundary(
heap,
size,
alignment,
boundary
);
break;
default:
/*
* Do not attempt to allocate memory if not in correct system state.
*/
return NULL;
}
if ( p == NULL && alignment == 0 && boundary == 0 ) {
p = (*rtems_malloc_extend_handler)( heap, size );
}
/*
* If the user wants us to dirty the allocated memory, then do it.
*/
if ( p != NULL && rtems_malloc_dirty_helper != NULL )
(*rtems_malloc_dirty_helper)( p, size );
return p;
}
void *rtems_malloc( size_t size )
{
if ( size == 0 ) {
return NULL;
}
return rtems_heap_allocate_aligned_with_boundary( size, 0, 0 );
}
#endif
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