mirror of
https://github.com/RGBCube/serenity
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649d2faeab
We had some inconsistencies before: - Sometimes "The", sometimes "the" - Sometimes trailing ".", sometimes no trailing "." I picked the most common one (lowecase "the", trailing ".") and applied it to all copyright headers. By using the exact same string everywhere we can ensure nothing gets missed during a global search (and replace), and that these inconsistencies are not spread any further (as copyright headers are commonly copied to new files).
47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
/*
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* Copyright (c) 2020, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Atomic.h>
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#include <AK/RefCounted.h>
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#include <Kernel/SpinLock.h>
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#include <Kernel/Thread.h>
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#include <Kernel/VM/VMObject.h>
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namespace Kernel {
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class FutexQueue : public Thread::BlockCondition
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, public RefCounted<FutexQueue>
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, public VMObjectDeletedHandler {
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public:
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FutexQueue(FlatPtr user_address_or_offset, VMObject* vmobject = nullptr);
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virtual ~FutexQueue();
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u32 wake_n_requeue(u32, const Function<FutexQueue*()>&, u32, bool&, bool&);
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u32 wake_n(u32, const Optional<u32>&, bool&);
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u32 wake_all(bool&);
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template<class... Args>
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Thread::BlockResult wait_on(const Thread::BlockTimeout& timeout, Args&&... args)
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{
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return Thread::current()->block<Thread::FutexBlocker>(timeout, *this, forward<Args>(args)...);
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}
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virtual void vmobject_deleted(VMObject&) override;
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protected:
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virtual bool should_add_blocker(Thread::Blocker& b, void* data) override;
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private:
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// For private futexes we just use the user space address.
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// But for global futexes we use the offset into the VMObject
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const FlatPtr m_user_address_or_offset;
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WeakPtr<VMObject> m_vmobject;
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const bool m_is_global;
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};
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}
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