1 files changed, 67 insertions, 0 deletions
diff --git a/src/knot/worker/queue.c b/src/knot/worker/queue.c
new file mode 100644
index 0000000..d9fc2b6
--- /dev/null
+++ b/src/knot/worker/queue.c
@@ -0,0 +1,67 @@
+/*  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/>.
+ */
+
+#include "knot/worker/queue.h"
+#include "contrib/mempattern.h"
+
+void worker_queue_init(worker_queue_t *queue)
+{
+	if (!queue) {
+		return;
+	}
+
+	memset(queue, 0, sizeof(worker_queue_t));
+
+	init_list(&queue->list);
+	mm_ctx_init(&queue->mm_ctx);
+}
+
+void worker_queue_deinit(worker_queue_t *queue)
+{
+	ptrlist_free(&queue->list, &queue->mm_ctx);
+}
+
+void worker_queue_enqueue(worker_queue_t *queue, worker_task_t *task)
+{
+	if (!queue || !task) {
+		return;
+	}
+
+	ptrlist_add(&queue->list, task, &queue->mm_ctx);
+}
+
+worker_task_t *worker_queue_dequeue(worker_queue_t *queue)
+{
+	if (!queue) {
+		return NULL;
+	}
+
+	worker_task_t *task = NULL;
+
+	if (!EMPTY_LIST(queue->list)) {
+		ptrnode_t *node = HEAD(queue->list);
+		task = (void *)node->d;
+		rem_node(&node->n);
+		queue->mm_ctx.free(&node->n);
+	}
+
+	return task;
+}
+
+size_t worker_queue_length(worker_queue_t *queue)
+{
+	return queue ? list_size(&queue->list) : 0;
+}