diff options
Diffstat (limited to 'lib/nghttp2_queue.c')
-rw-r--r-- | lib/nghttp2_queue.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/lib/nghttp2_queue.c b/lib/nghttp2_queue.c new file mode 100644 index 0000000..055eb69 --- /dev/null +++ b/lib/nghttp2_queue.c @@ -0,0 +1,85 @@ +/* + * nghttp2 - HTTP/2 C Library + * + * Copyright (c) 2012 Tatsuhiro Tsujikawa + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE + * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ +#include "nghttp2_queue.h" + +#include <string.h> +#include <assert.h> + +void nghttp2_queue_init(nghttp2_queue *queue) { + queue->front = queue->back = NULL; +} + +void nghttp2_queue_free(nghttp2_queue *queue) { + if (!queue) { + return; + } else { + nghttp2_queue_cell *p = queue->front; + while (p) { + nghttp2_queue_cell *next = p->next; + free(p); + p = next; + } + } +} + +int nghttp2_queue_push(nghttp2_queue *queue, void *data) { + nghttp2_queue_cell *new_cell = + (nghttp2_queue_cell *)malloc(sizeof(nghttp2_queue_cell)); + if (!new_cell) { + return NGHTTP2_ERR_NOMEM; + } + new_cell->data = data; + new_cell->next = NULL; + if (queue->back) { + queue->back->next = new_cell; + queue->back = new_cell; + + } else { + queue->front = queue->back = new_cell; + } + return 0; +} + +void nghttp2_queue_pop(nghttp2_queue *queue) { + nghttp2_queue_cell *front = queue->front; + assert(front); + queue->front = front->next; + if (front == queue->back) { + queue->back = NULL; + } + free(front); +} + +void *nghttp2_queue_front(nghttp2_queue *queue) { + assert(queue->front); + return queue->front->data; +} + +void *nghttp2_queue_back(nghttp2_queue *queue) { + assert(queue->back); + return queue->back->data; +} + +int nghttp2_queue_empty(nghttp2_queue *queue) { return queue->front == NULL; } |