source: rtems/cpukit/posix/src/keyfreememory.c @ 172e953

4.115
Last change on this file since 172e953 was 172e953, checked in by Sebastian Huber <sebastian.huber@…>, on 12/12/14 at 12:16:11

posix: Delete key/value if value is set to NULL

  • Property mode set to 100644
File size: 1.4 KB
Line 
1/**
2 * @file
3 *
4 * @brief POSIX Function Keys Free Memory
5 * @ingroup POSIXAPI
6 */
7
8/*
9 * Copyright (c) 2012 Zhongwei Yao.
10 * COPYRIGHT (c) 1989-2010.
11 * On-Line Applications Research Corporation (OAR).
12 *
13 * The license and distribution terms for this file may be
14 * found in the file LICENSE in this distribution or at
15 * http://www.rtems.org/license/LICENSE.
16 */
17
18#if HAVE_CONFIG_H
19#include "config.h"
20#endif
21
22#include <rtems/posix/keyimpl.h>
23#include <rtems/score/chainimpl.h>
24
25void _POSIX_Keys_Free_memory(
26  POSIX_Keys_Control *the_key
27)
28{
29  POSIX_Keys_Key_value_pair *p;
30  RBTree_Node *iter, *next;
31  Objects_Id key_id;
32
33  key_id = the_key->Object.id;
34  iter = _POSIX_Keys_Find( key_id, 0 );
35  if ( !iter )
36    return;
37  /**
38   * find the smallest thread_id node in the rbtree.
39   */
40  next = _RBTree_Next( iter, RBT_LEFT );
41  p = POSIX_KEYS_RBTREE_NODE_TO_KEY_VALUE_PAIR( next );
42  while ( next != NULL && p->key == key_id) {
43    iter = next;
44    next = _RBTree_Next( iter, RBT_LEFT );
45    p = POSIX_KEYS_RBTREE_NODE_TO_KEY_VALUE_PAIR( next );
46  }
47
48  /**
49   * delete all nodes belongs to the_key from the rbtree and chain.
50   */
51  p = POSIX_KEYS_RBTREE_NODE_TO_KEY_VALUE_PAIR( iter );
52  while ( iter != NULL && p->key == key_id ) {
53    next = _RBTree_Next( iter, RBT_RIGHT );
54
55    _POSIX_Keys_Free_key_value_pair( p );
56
57    iter = next;
58    p = POSIX_KEYS_RBTREE_NODE_TO_KEY_VALUE_PAIR( iter );
59  }
60}
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