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Serenity Operating System
1/*
2 * Copyright (c) 2020, the SerenityOS developers.
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#pragma once
8
9#include <AK/Atomic.h>
10#include <Kernel/Locking/Spinlock.h>
11#include <Kernel/Thread.h>
12
13namespace Kernel {
14
15class WaitQueue final : public Thread::BlockerSet {
16public:
17 u32 wake_one();
18 u32 wake_n(u32 wake_count);
19 u32 wake_all();
20
21 template<class... Args>
22 Thread::BlockResult wait_on(Thread::BlockTimeout const& timeout, Args&&... args)
23 {
24 return Thread::current()->block<Thread::WaitQueueBlocker>(timeout, *this, forward<Args>(args)...);
25 }
26
27 template<class... Args>
28 void wait_forever(Args&&... args)
29 {
30 (void)Thread::current()->block<Thread::WaitQueueBlocker>({}, *this, forward<Args>(args)...);
31 }
32
33protected:
34 virtual bool should_add_blocker(Thread::Blocker& b, void*) override;
35
36private:
37 bool m_wake_requested { false };
38};
39
40}