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41376d4662
There was a time window between releasing Lock::m_lock and calling into the lock's WaitQueue where someone else could take m_lock and bring two threads into a deadlock situation. Fix this issue by holding Lock::m_lock until interrupts are disabled by either Thread::wait_on() or WaitQueue::wake_one().
20 lines
370 B
C++
20 lines
370 B
C++
#pragma once
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#include <AK/Atomic.h>
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#include <AK/SinglyLinkedList.h>
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#include <Kernel/Thread.h>
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class WaitQueue {
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public:
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WaitQueue();
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~WaitQueue();
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void enqueue(Thread&);
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void wake_one(Atomic<bool>* lock = nullptr);
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void wake_all();
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private:
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typedef IntrusiveList<Thread, &Thread::m_wait_queue_node> ThreadList;
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ThreadList m_threads;
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};
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