Add queue implementation

src/base/queue/queue.c

@@ -0,0 +1,20 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
+#include "queue.h"
+#include "../array/array.h"
+#include "../../common/assert/assert.h"
+#include <string.h>
+
+void _queue_pop_front(GenericQueue *queue, void *output, u64 item_size) {
+	wapp_debug_assert(queue != NULL && output != NULL, "`queue` and `output` should not be NULL");
+	wapp_runtime_assert(item_size == wapp_array_item_size(queue->items), "Invalid type");
+
+	memcpy(output, queue->items, item_size);
+
+	u64 new_count = wapp_array_count(queue->items) - 1;
+	for (u64 i = 0; i < new_count; ++i) {
+		_array_set(queue->items, i, _array_get(queue->items, i + 1, item_size), item_size);
+	}
+
+	wapp_array_set_count(queue->items, new_count);
+}