1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/****************************************************************************
* net/iob/iob_remove_queue.c
*
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <debug.h>
#include <nuttx/net/iob.h>
#include "iob.h"
#if CONFIG_IOB_NCHAINS > 0
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef NULL
# define NULL ((FAR void *)0)
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: iob_add_queue
*
* Description:
* Remove one I/O buffer chain from the heaqd of a queue.
*
****************************************************************************/
FAR struct iob_s *iob_remove_queue(FAR struct iob_queue_s *iobq)
{
FAR struct iob_qentry_s *qentry;
FAR struct iob_s *iob = NULL;
/* Remove the I/O buffer chain from the head of the queue */
qentry = iobq->qh_head;
if (qentry)
{
iobq->qh_head = qentry->qe_flink;
if (!iobq->qh_head)
{
iobq->qh_tail = NULL;
}
/* Extract the I/O buffer chain from the container and free the
* container.
*/
iob = qentry->qe_head;
iob_free_qentry(qentry);
}
return iob;
}
#endif /* CONFIG_IOB_NCHAINS > 0 */
|
