mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-11 05:25:32 +03:00
SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
67 lines
1.4 KiB
C++
67 lines
1.4 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/OwnPtr.h>
|
|
#include <AK/SinglyLinkedList.h>
|
|
#include <AK/Vector.h>
|
|
|
|
namespace AK {
|
|
|
|
template<typename T, int segment_size = 1000>
|
|
class Queue {
|
|
public:
|
|
Queue() = default;
|
|
~Queue() = default;
|
|
|
|
size_t size() const { return m_size; }
|
|
bool is_empty() const { return m_size == 0; }
|
|
|
|
template<typename U = T>
|
|
void enqueue(U&& value)
|
|
{
|
|
if (m_segments.is_empty() || m_segments.last()->size() >= segment_size)
|
|
m_segments.append(make<Vector<T, segment_size>>());
|
|
m_segments.last()->append(forward<U>(value));
|
|
++m_size;
|
|
}
|
|
|
|
T dequeue()
|
|
{
|
|
VERIFY(!is_empty());
|
|
auto value = move((*m_segments.first())[m_index_into_first++]);
|
|
if (m_index_into_first == segment_size) {
|
|
m_segments.take_first();
|
|
m_index_into_first = 0;
|
|
}
|
|
--m_size;
|
|
return value;
|
|
}
|
|
|
|
const T& head() const
|
|
{
|
|
VERIFY(!is_empty());
|
|
return (*m_segments.first())[m_index_into_first];
|
|
}
|
|
|
|
void clear()
|
|
{
|
|
m_segments.clear();
|
|
m_index_into_first = 0;
|
|
m_size = 0;
|
|
}
|
|
|
|
private:
|
|
SinglyLinkedList<OwnPtr<Vector<T, segment_size>>> m_segments;
|
|
size_t m_index_into_first { 0 };
|
|
size_t m_size { 0 };
|
|
};
|
|
|
|
}
|
|
|
|
using AK::Queue;
|