2 * nghttp2 - HTTP/2 C Library
4 * Copyright (c) 2012 Tatsuhiro Tsujikawa
6 * Permission is hereby granted, free of charge, to any person obtaining
7 * a copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sublicense, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice shall be
15 * included in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 #include "nghttp2_queue.h"
30 void nghttp2_queue_init(nghttp2_queue *queue) {
31 queue->front = queue->back = NULL;
34 void nghttp2_queue_free(nghttp2_queue *queue) {
38 nghttp2_queue_cell *p = queue->front;
40 nghttp2_queue_cell *next = p->next;
47 int nghttp2_queue_push(nghttp2_queue *queue, void *data) {
48 nghttp2_queue_cell *new_cell =
49 (nghttp2_queue_cell *)malloc(sizeof(nghttp2_queue_cell));
51 return NGHTTP2_ERR_NOMEM;
53 new_cell->data = data;
54 new_cell->next = NULL;
56 queue->back->next = new_cell;
57 queue->back = new_cell;
60 queue->front = queue->back = new_cell;
65 void nghttp2_queue_pop(nghttp2_queue *queue) {
66 nghttp2_queue_cell *front = queue->front;
68 queue->front = front->next;
69 if (front == queue->back) {
75 void *nghttp2_queue_front(nghttp2_queue *queue) {
77 return queue->front->data;
80 void *nghttp2_queue_back(nghttp2_queue *queue) {
82 return queue->back->data;
85 int nghttp2_queue_empty(nghttp2_queue *queue) { return queue->front == NULL; }