mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-14 01:04:38 +03:00
41d2a0e9f7
If a thread is waiting but getting killed, we need to dequeue the thread from the WaitQueue so that a potential wake before finalization doesn't happen.
57 lines
2.0 KiB
C++
57 lines
2.0 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/Atomic.h>
|
|
#include <AK/SinglyLinkedList.h>
|
|
#include <Kernel/SpinLock.h>
|
|
#include <Kernel/Thread.h>
|
|
|
|
namespace Kernel {
|
|
|
|
class WaitQueue {
|
|
public:
|
|
WaitQueue();
|
|
~WaitQueue();
|
|
|
|
SpinLock<u32>& get_lock() { return m_lock; }
|
|
bool enqueue(Thread&);
|
|
bool dequeue(Thread&);
|
|
void wake_one(Atomic<bool>* lock = nullptr);
|
|
void wake_n(u32 wake_count);
|
|
void wake_all();
|
|
void clear();
|
|
|
|
private:
|
|
typedef IntrusiveList<Thread, &Thread::m_wait_queue_node> ThreadList;
|
|
ThreadList m_threads;
|
|
SpinLock<u32> m_lock;
|
|
bool m_wake_requested { false };
|
|
};
|
|
|
|
}
|