78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/*
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* Wslay - The WebSocket Library
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*
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* Copyright (c) 2011, 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 "wslay_queue.h"
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#include <string.h>
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#include <assert.h>
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#include "wslay_macro.h"
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void wslay_queue_init(struct wslay_queue *queue) {
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queue->top = NULL;
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queue->tail = &queue->top;
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}
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void wslay_queue_deinit(struct wslay_queue *queue) { (void)queue; }
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void wslay_queue_push(struct wslay_queue *queue,
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struct wslay_queue_entry *ent) {
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ent->next = NULL;
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*queue->tail = ent;
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queue->tail = &ent->next;
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}
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void wslay_queue_push_front(struct wslay_queue *queue,
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struct wslay_queue_entry *ent) {
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ent->next = queue->top;
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queue->top = ent;
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if (ent->next == NULL) {
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queue->tail = &ent->next;
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}
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}
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void wslay_queue_pop(struct wslay_queue *queue) {
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assert(queue->top);
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queue->top = queue->top->next;
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if (queue->top == NULL) {
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queue->tail = &queue->top;
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}
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}
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struct wslay_queue_entry *wslay_queue_top(struct wslay_queue *queue) {
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assert(queue->top);
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return queue->top;
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}
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struct wslay_queue_entry *wslay_queue_tail(struct wslay_queue *queue) {
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assert(queue->top);
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return wslay_struct_of(queue->tail, struct wslay_queue_entry, next);
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}
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int wslay_queue_empty(struct wslay_queue *queue) {
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assert(queue->top || queue->tail == &queue->top);
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return queue->top == NULL;
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}
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