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/*
* Copyright (c) 2013-2014 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/chain.h>
#if defined( RTEMS_SMP )
#include <rtems/score/smplock.h>
static SMP_lock_Control chain_lock = SMP_LOCK_INITIALIZER("chains");
static void chain_acquire( SMP_lock_Context *lock_context )
{
_SMP_lock_ISR_disable_and_acquire( &chain_lock, lock_context );
}
static void chain_release( SMP_lock_Context *lock_context )
{
_SMP_lock_Release_and_ISR_enable( &chain_lock, lock_context );
}
void rtems_chain_extract( rtems_chain_node *node )
{
SMP_lock_Context lock_context;
chain_acquire( &lock_context );
_Chain_Extract_unprotected( node );
chain_release( &lock_context );
}
rtems_chain_node *rtems_chain_get( rtems_chain_control *chain )
{
rtems_chain_node *node;
SMP_lock_Context lock_context;
chain_acquire( &lock_context );
node = _Chain_Get_unprotected( chain );
chain_release( &lock_context );
return node;
}
void rtems_chain_insert( rtems_chain_node *after_node, rtems_chain_node *node )
{
SMP_lock_Context lock_context;
chain_acquire( &lock_context );
_Chain_Insert_unprotected( after_node, node );
chain_release( &lock_context );
}
void rtems_chain_append(
rtems_chain_control *chain,
rtems_chain_node *node
)
{
SMP_lock_Context lock_context;
chain_acquire( &lock_context );
_Chain_Append_unprotected( chain, node );
chain_release( &lock_context );
}
void rtems_chain_prepend(
rtems_chain_control *chain,
rtems_chain_node *node
)
{
SMP_lock_Context lock_context;
chain_acquire( &lock_context );
_Chain_Prepend_unprotected( chain, node );
chain_release( &lock_context );
}
bool rtems_chain_append_with_empty_check(
rtems_chain_control *chain,
rtems_chain_node *node
)
{
bool was_empty;
SMP_lock_Context lock_context;
chain_acquire( &lock_context );
was_empty = _Chain_Append_with_empty_check_unprotected( chain, node );
chain_release( &lock_context );
return was_empty;
}
bool rtems_chain_prepend_with_empty_check(
rtems_chain_control *chain,
rtems_chain_node *node
)
{
bool was_empty;
SMP_lock_Context lock_context;
chain_acquire( &lock_context );
was_empty = _Chain_Prepend_with_empty_check_unprotected( chain, node );
chain_release( &lock_context );
return was_empty;
}
bool rtems_chain_get_with_empty_check(
rtems_chain_control *chain,
rtems_chain_node **node
)
{
bool is_empty_now;
SMP_lock_Context lock_context;
chain_acquire( &lock_context );
is_empty_now = _Chain_Get_with_empty_check_unprotected( chain, node );
chain_release( &lock_context );
return is_empty_now;
}
#endif /* defined( RTEMS_SMP ) */
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