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/*
* Copyright (c) 2010 Gedare Bloom.
*
* 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.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/system.h>
#include <rtems/score/address.h>
#include <rtems/score/rbtree.h>
#include <rtems/score/isr.h>
/*
* _RBTree_Get
*
* This kernel routine returns a pointer to the min or max node on the tree,
* without removing that node.
*
* Input parameters:
* the_rbtree - pointer to rbtree header
* dir - specifies whether to return minimum (0) or maximum (1)
*
* Output parameters:
* return_node - pointer to node in rbtree allocated
* NULL - if no nodes available
*
* INTERRUPT LATENCY:
* only case
*/
RBTree_Node *_RBTree_Peek(
RBTree_Control *the_rbtree,
RBTree_Direction dir
)
{
ISR_Level level;
RBTree_Node *return_node;
return_node = NULL;
_ISR_Disable( level );
return_node = _RBTree_Peek_unprotected( the_rbtree, dir );
_ISR_Enable( level );
return return_node;
}
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