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/* Copyright 2015 greenbytes GmbH (https://www.greenbytes.de)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <assert.h>
#include <stddef.h>
#include <httpd.h>
#include <http_core.h>
#include "h2_task.h"
#include "h2_task_queue.h"
h2_task_queue *h2_tq_create(long id, apr_pool_t *pool)
{
h2_task_queue *q = apr_pcalloc(pool, sizeof(h2_task_queue));
if (q) {
q->id = id;
APR_RING_ELEM_INIT(q, link);
APR_RING_INIT(&q->tasks, h2_task, link);
}
return q;
}
void h2_tq_destroy(h2_task_queue *q)
{
while (!H2_TASK_LIST_EMPTY(&q->tasks)) {
h2_task *task = H2_TASK_LIST_FIRST(&q->tasks);
H2_TASK_REMOVE(task);
}
}
static int in_list(h2_task_queue *q, h2_task *task)
{
h2_task *e;
for (e = H2_TASK_LIST_FIRST(&q->tasks);
e != H2_TASK_LIST_SENTINEL(&q->tasks);
e = H2_TASK_NEXT(e)) {
if (e == task) {
return 1;
}
}
return 0;
}
int h2_tq_empty(h2_task_queue *q)
{
return H2_TASK_LIST_EMPTY(&q->tasks);
}
void h2_tq_append(h2_task_queue *q, struct h2_task *task)
{
H2_TASK_LIST_INSERT_TAIL(&q->tasks, task);
}
apr_status_t h2_tq_remove(h2_task_queue *q, struct h2_task *task)
{
if (in_list(q, task)) {
H2_TASK_REMOVE(task);
return APR_SUCCESS;
}
return APR_NOTFOUND;
}
h2_task *h2_tq_pop_first(h2_task_queue *q)
{
if (!H2_TASK_LIST_EMPTY(&q->tasks)) {
h2_task *task = H2_TASK_LIST_FIRST(&q->tasks);
H2_TASK_REMOVE(task);
return task;
}
return NULL;
}
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