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/*
* Copyright (c) 2020, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Atomic.h>
#include <Kernel/Locking/SpinLock.h>
#include <Kernel/Thread.h>
namespace Kernel {
class WaitQueue : public Thread::BlockCondition {
public:
u32 wake_one();
u32 wake_n(u32 wake_count);
u32 wake_all();
void should_block(bool block)
{
ScopedSpinLock lock(m_lock);
m_should_block = block;
}
template<class... Args>
Thread::BlockResult wait_on(const Thread::BlockTimeout& timeout, Args&&... args)
{
return Thread::current()->block<Thread::QueueBlocker>(timeout, *this, forward<Args>(args)...);
}
template<class... Args>
void wait_forever(Args&&... args)
{
(void)Thread::current()->block<Thread::QueueBlocker>({}, *this, forward<Args>(args)...);
}
protected:
virtual bool should_add_blocker(Thread::Blocker& b, void* data) override;
private:
bool m_wake_requested { false };
bool m_should_block { true };
};
}
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