source: rtems/cpukit/score/src/chainget.c @ 25f5730f

4.11
Last change on this file since 25f5730f was c499856, checked in by Chris Johns <chrisj@…>, on Mar 20, 2014 at 9:10:47 PM

Change all references of rtems.com to rtems.org.

  • Property mode set to 100644
File size: 805 bytes
Line 
1/**
2 * @file
3 *
4 * @brief Get the First Node
5 * @ingroup ScoreChain
6 */
7
8/*
9 *  COPYRIGHT (c) 1989-2007.
10 *  On-Line Applications Research Corporation (OAR).
11 *
12 *  The license and distribution terms for this file may be
13 *  found in the file LICENSE in this distribution or at
14 *  http://www.rtems.org/license/LICENSE.
15 */
16
17#if HAVE_CONFIG_H
18#include "config.h"
19#endif
20
21#include <rtems/system.h>
22#include <rtems/score/address.h>
23#include <rtems/score/chainimpl.h>
24#include <rtems/score/isr.h>
25
26Chain_Node *_Chain_Get(
27  Chain_Control *the_chain
28)
29{
30  ISR_Level          level;
31  Chain_Node *return_node;
32
33  return_node = NULL;
34  _ISR_Disable( level );
35    if ( !_Chain_Is_empty( the_chain ) )
36      return_node = _Chain_Get_first_unprotected( the_chain );
37  _ISR_Enable( level );
38  return return_node;
39}
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