85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
/*
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* nghttp2 - HTTP/2 C Library
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*
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* Copyright (c) 2012 Tatsuhiro Tsujikawa
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "nghttp2_queue.h"
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#include <string.h>
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#include <assert.h>
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void nghttp2_queue_init(nghttp2_queue *queue) {
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queue->front = queue->back = NULL;
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}
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void nghttp2_queue_free(nghttp2_queue *queue) {
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if (!queue) {
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return;
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} else {
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nghttp2_queue_cell *p = queue->front;
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while (p) {
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nghttp2_queue_cell *next = p->next;
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free(p);
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p = next;
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}
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}
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}
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int nghttp2_queue_push(nghttp2_queue *queue, void *data) {
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nghttp2_queue_cell *new_cell =
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(nghttp2_queue_cell *)malloc(sizeof(nghttp2_queue_cell));
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if (!new_cell) {
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return NGHTTP2_ERR_NOMEM;
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}
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new_cell->data = data;
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new_cell->next = NULL;
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if (queue->back) {
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queue->back->next = new_cell;
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queue->back = new_cell;
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} else {
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queue->front = queue->back = new_cell;
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}
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return 0;
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}
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void nghttp2_queue_pop(nghttp2_queue *queue) {
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nghttp2_queue_cell *front = queue->front;
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assert(front);
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queue->front = front->next;
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if (front == queue->back) {
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queue->back = NULL;
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}
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free(front);
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}
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void *nghttp2_queue_front(nghttp2_queue *queue) {
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assert(queue->front);
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return queue->front->data;
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}
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void *nghttp2_queue_back(nghttp2_queue *queue) {
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assert(queue->back);
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return queue->back->data;
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}
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int nghttp2_queue_empty(nghttp2_queue *queue) { return queue->front == NULL; }
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