forked from Imagelibrary/rtems
76 lines
1.7 KiB
C
76 lines
1.7 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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#if 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 "malloc_p.h"
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#include <rtems/chain.h>
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#include <rtems/score/sysstate.h>
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#include <rtems/score/threaddispatch.h>
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static RTEMS_CHAIN_DEFINE_EMPTY( _Malloc_GC_list );
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RTEMS_INTERRUPT_LOCK_DEFINE( static, _Malloc_GC_lock, "Malloc GC" )
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bool malloc_is_system_state_OK(void)
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{
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return !_System_state_Is_up( _System_state_Get() )
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|| _Thread_Dispatch_is_enabled();
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}
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static void *_Malloc_Get_deferred_free( void )
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{
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rtems_interrupt_lock_context lock_context;
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void *p;
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rtems_interrupt_lock_acquire( &_Malloc_GC_lock, &lock_context );
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p = rtems_chain_get_unprotected( &_Malloc_GC_list );
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rtems_interrupt_lock_release( &_Malloc_GC_lock, &lock_context );
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return p;
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}
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void malloc_deferred_frees_process( void )
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{
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rtems_chain_node *to_be_freed;
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/*
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* If some free's have been deferred, then do them now.
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*/
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while ( ( to_be_freed = _Malloc_Get_deferred_free() ) != NULL ) {
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free( to_be_freed );
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}
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}
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void malloc_deferred_free( void *p )
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{
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rtems_interrupt_lock_context lock_context;
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rtems_interrupt_lock_acquire( &_Malloc_GC_lock, &lock_context );
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rtems_chain_append_unprotected( &_Malloc_GC_list, (rtems_chain_node *) p );
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rtems_interrupt_lock_release( &_Malloc_GC_lock, &lock_context );
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}
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#endif
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