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
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/*
* This file is part of the PCEPlib, a PCEP protocol library.
*
* Copyright (C) 2020 Volta Networks https://voltanet.io/
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* Author : Brady Johnson <brady@voltanet.io>
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include "pcep_utils_logging.h"
#include "pcep_utils_memory.h"
#include "pcep_utils_queue.h"
queue_handle *queue_initialize(void)
{
/* Set the max_entries to 0 to disable it */
return queue_initialize_with_size(0);
}
queue_handle *queue_initialize_with_size(unsigned int max_entries)
{
queue_handle *handle =
pceplib_malloc(PCEPLIB_INFRA, sizeof(queue_handle));
memset(handle, 0, sizeof(queue_handle));
handle->max_entries = max_entries;
return handle;
}
void queue_destroy(queue_handle *handle)
{
if (handle == NULL) {
pcep_log(
LOG_DEBUG,
"%s: queue_destroy, the queue has not been initialized",
__func__);
return;
}
while (queue_dequeue(handle) != NULL) {
}
pceplib_free(PCEPLIB_INFRA, handle);
}
void queue_destroy_with_data(queue_handle *handle)
{
if (handle == NULL) {
pcep_log(
LOG_DEBUG,
"%s: queue_destroy_with_data, the queue has not been initialized",
__func__);
return;
}
void *data = queue_dequeue(handle);
while (data != NULL) {
pceplib_free(PCEPLIB_INFRA, data);
data = queue_dequeue(handle);
}
pceplib_free(PCEPLIB_INFRA, handle);
}
queue_node *queue_enqueue(queue_handle *handle, void *data)
{
if (handle == NULL) {
pcep_log(
LOG_DEBUG,
"%s: queue_enqueue, the queue has not been initialized",
__func__);
return NULL;
}
if (handle->max_entries > 0
&& handle->num_entries >= handle->max_entries) {
pcep_log(
LOG_DEBUG,
"%s: queue_enqueue, cannot enqueue: max entries hit [%u]",
handle->num_entries);
return NULL;
}
queue_node *new_node =
pceplib_malloc(PCEPLIB_INFRA, sizeof(queue_node));
memset(new_node, 0, sizeof(queue_node));
new_node->data = data;
new_node->next_node = NULL;
(handle->num_entries)++;
if (handle->head == NULL) {
/* its the first entry in the queue */
handle->head = handle->tail = new_node;
} else {
handle->tail->next_node = new_node;
handle->tail = new_node;
}
return new_node;
}
void *queue_dequeue(queue_handle *handle)
{
if (handle == NULL) {
pcep_log(
LOG_DEBUG,
"%s: queue_dequeue, the queue has not been initialized",
__func__);
return NULL;
}
if (handle->head == NULL) {
return NULL;
}
void *node_data = handle->head->data;
queue_node *node = handle->head;
(handle->num_entries)--;
if (handle->head == handle->tail) {
/* its the last entry in the queue */
handle->head = handle->tail = NULL;
} else {
handle->head = node->next_node;
}
pceplib_free(PCEPLIB_INFRA, node);
return node_data;
}
|
