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
98
|
// Part of the Wasmtime Project, under the Apache License v2.0 with LLVM
// Exceptions. See
// https://github.com/bytecodealliance/wasmtime/blob/main/LICENSE for license
// information.
//
// Significant parts of this file are derived from cloudabi-utils. See
// https://github.com/bytecodealliance/wasmtime/blob/main/lib/wasi/sandboxed-system-primitives/src/LICENSE
// for license information.
//
// The upstream file contains the following copyright notice:
//
// Copyright (c) 2016 Nuxi, https://nuxi.nl/
#ifndef QUEUE_H
#define QUEUE_H
// LIST: Double-linked list.
#define LIST_HEAD(name, type) \
struct name { \
struct type *l_first; \
}
/* clang-format off */
#define LIST_HEAD_INITIALIZER(head) \
{ NULL }
/* clang-format on */
#define LIST_ENTRY(type) \
struct { \
struct type *l_next; \
struct type **l_prev; \
}
#define LIST_FOREACH(var, head, field) \
for ((var) = (head)->l_first; (var) != NULL; (var) = (var)->field.l_next)
#define LIST_INIT(head) \
do { \
(head)->l_first = NULL; \
} while (0)
#define LIST_INSERT_HEAD(head, element, field) \
do { \
(element)->field.l_next = (head)->l_first; \
if ((head)->l_first != NULL) \
(head)->l_first->field.l_prev = &(element)->field.l_next; \
(head)->l_first = (element); \
(element)->field.l_prev = &(head)->l_first; \
} while (0)
#define LIST_REMOVE(element, field) \
do { \
if ((element)->field.l_next != NULL) \
(element)->field.l_next->field.l_prev = (element)->field.l_prev; \
*(element)->field.l_prev = (element)->field.l_next; \
} while (0)
// TAILQ: Double-linked list with tail pointer.
#define TAILQ_HEAD(name, type) \
struct name { \
struct type *t_first; \
struct type **t_last; \
}
#define TAILQ_ENTRY(type) \
struct { \
struct type *t_next; \
struct type **t_prev; \
}
#define TAILQ_EMPTY(head) ((head)->t_first == NULL)
#define TAILQ_FIRST(head) ((head)->t_first)
#define TAILQ_FOREACH(var, head, field) \
for ((var) = (head)->t_first; (var) != NULL; (var) = (var)->field.t_next)
#define TAILQ_INIT(head) \
do { \
(head)->t_first = NULL; \
(head)->t_last = &(head)->t_first; \
} while (0)
#define TAILQ_INSERT_TAIL(head, elm, field) \
do { \
(elm)->field.t_next = NULL; \
(elm)->field.t_prev = (head)->t_last; \
*(head)->t_last = (elm); \
(head)->t_last = &(elm)->field.t_next; \
} while (0)
#define TAILQ_REMOVE(head, element, field) \
do { \
if ((element)->field.t_next != NULL) \
(element)->field.t_next->field.t_prev = (element)->field.t_prev; \
else \
(head)->t_last = (element)->field.t_prev; \
*(element)->field.t_prev = (element)->field.t_next; \
} while (0)
#endif
|