forked from Imagelibrary/rtems
135 lines
3.7 KiB
C
135 lines
3.7 KiB
C
/* 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
|