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/**
* @file
*
* @ingroup libcsupport
*
* @brief calloc()
*/
/*
* 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.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef RTEMS_NEWLIB
#include "malloc_p.h"
#include <stdlib.h>
#include <rtems/chain.h>
static RTEMS_CHAIN_DEFINE_EMPTY( _Malloc_GC_list );
RTEMS_INTERRUPT_LOCK_DEFINE( static, _Malloc_GC_lock, "Malloc GC" )
static void *_Malloc_Get_deferred_free( void )
{
rtems_interrupt_lock_context lock_context;
void *p;
rtems_interrupt_lock_acquire( &_Malloc_GC_lock, &lock_context );
p = rtems_chain_get_unprotected( &_Malloc_GC_list );
rtems_interrupt_lock_release( &_Malloc_GC_lock, &lock_context );
return p;
}
void _Malloc_Process_deferred_frees( void )
{
rtems_chain_node *to_be_freed;
/*
* If some free's have been deferred, then do them now.
*/
while ( ( to_be_freed = _Malloc_Get_deferred_free() ) != NULL ) {
free( to_be_freed );
}
}
static void _Malloc_Deferred_free( void *p )
{
rtems_interrupt_lock_context lock_context;
rtems_chain_node *node;
node = (rtems_chain_node *) p;
rtems_interrupt_lock_acquire( &_Malloc_GC_lock, &lock_context );
rtems_chain_initialize_node( node );
rtems_chain_append_unprotected( &_Malloc_GC_list, node );
rtems_interrupt_lock_release( &_Malloc_GC_lock, &lock_context );
}
void free(
void *ptr
)
{
if ( !ptr )
return;
/*
* Do not attempt to free memory if in a critical section or ISR.
*/
if ( _Malloc_System_state() != MALLOC_SYSTEM_STATE_NORMAL ) {
_Malloc_Deferred_free(ptr);
return;
}
if ( !_Protected_heap_Free( RTEMS_Malloc_Heap, ptr ) ) {
rtems_fatal( RTEMS_FATAL_SOURCE_INVALID_HEAP_FREE, (rtems_fatal_code) ptr );
}
}
#endif
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