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/**
* @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).
*
* 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.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef RTEMS_NEWLIB
#include <stdlib.h>
#include "malloc_p.h"
#include <rtems/chain.h>
#include <rtems/score/sysstate.h>
#include <rtems/score/threaddispatch.h>
static RTEMS_CHAIN_DEFINE_EMPTY( _Malloc_GC_list );
RTEMS_INTERRUPT_LOCK_DEFINE( static, _Malloc_GC_lock, "Malloc GC" )
bool malloc_is_system_state_OK(void)
{
return !_System_state_Is_up( _System_state_Get() )
|| _Thread_Dispatch_is_enabled();
}
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_deferred_frees_process( 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 );
}
}
void malloc_deferred_free( void *p )
{
rtems_interrupt_lock_context lock_context;
rtems_interrupt_lock_acquire( &_Malloc_GC_lock, &lock_context );
rtems_chain_append_unprotected( &_Malloc_GC_list, (rtems_chain_node *) p );
rtems_interrupt_lock_release( &_Malloc_GC_lock, &lock_context );
}
#endif
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