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/* Copyright (C) 2021 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#include "contrib/ucw/lists.h"
struct task;
typedef void (*task_cb)(struct task *);
/*!
* \brief Task executable by a worker.
*/
typedef struct task {
void *ctx;
task_cb run;
} worker_task_t;
/*!
* \brief Worker queue.
*/
typedef struct worker_queue {
knot_mm_t mm_ctx;
list_t list;
} worker_queue_t;
/*!
* \brief Initialize worker queue.
*/
void worker_queue_init(worker_queue_t *queue);
/*!
* \brief Deinitialize worker queue.
*/
void worker_queue_deinit(worker_queue_t *queue);
/*!
* \brief Insert new item into the queue.
*/
void worker_queue_enqueue(worker_queue_t *queue, worker_task_t *task);
/*!
* \brief Remove item from the queue.
*
* \return Task or NULL if the queue is empty.
*/
worker_task_t *worker_queue_dequeue(worker_queue_t *queue);
/*!
* \brief Return number of tasks in worker queue.
*/
size_t worker_queue_length(worker_queue_t *queue);
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