1 /*
2  *   BSD LICENSE
3  *
4  *   Copyright (C) Cavium, Inc. 2016.
5  *
6  *   Redistribution and use in source and binary forms, with or without
7  *   modification, are permitted provided that the following conditions
8  *   are met:
9  *
10  *     * Redistributions of source code must retain the above copyright
11  *       notice, this list of conditions and the following disclaimer.
12  *     * Redistributions in binary form must reproduce the above copyright
13  *       notice, this list of conditions and the following disclaimer in
14  *       the documentation and/or other materials provided with the
15  *       distribution.
16  *     * Neither the name of Cavium, Inc nor the names of its
17  *       contributors may be used to endorse or promote products derived
18  *       from this software without specific prior written permission.
19  *
20  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 #include <assert.h>
34 #include <stddef.h>
35 #include <err.h>
36 
37 #include "nicvf_bsvf.h"
38 #include "nicvf_plat.h"
39 
40 static STAILQ_HEAD(, svf_entry) head = STAILQ_HEAD_INITIALIZER(head);
41 
42 void
43 nicvf_bsvf_push(struct svf_entry *entry)
44 {
45 	assert(entry != NULL);
46 	assert(entry->vf != NULL);
47 
48 	STAILQ_INSERT_TAIL(&head, entry, next);
49 }
50 
51 struct svf_entry *
52 nicvf_bsvf_pop(void)
53 {
54 	struct svf_entry *entry;
55 
56 	assert(!STAILQ_EMPTY(&head));
57 
58 	entry = STAILQ_FIRST(&head);
59 
60 	assert(entry != NULL);
61 	assert(entry->vf != NULL);
62 
63 	STAILQ_REMOVE_HEAD(&head, next);
64 
65 	return entry;
66 }
67 
68 int
69 nicvf_bsvf_empty(void)
70 {
71 	return STAILQ_EMPTY(&head);
72 }
73