ladybird/Kernel/WaitQueue.h

#pragma once

#include <AK/SinglyLinkedList.h>
#include <Kernel/Thread.h>

class WaitQueue {
public:
    WaitQueue();
    ~WaitQueue();

    void enqueue(Thread&);
    void wake_one();
    void wake_all();

private:
    typedef IntrusiveList<Thread, &Thread::m_wait_queue_node> ThreadList;
    ThreadList m_threads;
};
Kernel: Add a WaitQueue for Thread queueing/waking and use it for Lock The kernel's Lock class now uses a proper wait queue internally instead of just having everyone wake up regularly to try to acquire the lock. We also keep the donation mechanism, so that whenever someone tries to take the lock and fails, that thread donates the remainder of its timeslice to the current lock holder. After unlocking a Lock, the unlocking thread calls WaitQueue::wake_one, which unblocks the next thread in queue. 2019-12-01 05:57:20 -05:00			`#pragma once`

			`#include <AK/SinglyLinkedList.h>`
Kernel: Use IntrusiveList to make WaitQueue allocation-free :^) 2019-12-22 06:23:44 -05:00			`#include <Kernel/Thread.h>`
Kernel: Add a WaitQueue for Thread queueing/waking and use it for Lock The kernel's Lock class now uses a proper wait queue internally instead of just having everyone wake up regularly to try to acquire the lock. We also keep the donation mechanism, so that whenever someone tries to take the lock and fails, that thread donates the remainder of its timeslice to the current lock holder. After unlocking a Lock, the unlocking thread calls WaitQueue::wake_one, which unblocks the next thread in queue. 2019-12-01 05:57:20 -05:00
			`class WaitQueue {`
			`public:`
			`WaitQueue();`
			`~WaitQueue();`

			`void enqueue(Thread&);`
			`void wake_one();`
			`void wake_all();`

			`private:`
Kernel: Use IntrusiveList to make WaitQueue allocation-free :^) 2019-12-22 06:23:44 -05:00			`typedef IntrusiveList<Thread, &Thread::m_wait_queue_node> ThreadList;`
			`ThreadList m_threads;`
Kernel: Add a WaitQueue for Thread queueing/waking and use it for Lock The kernel's Lock class now uses a proper wait queue internally instead of just having everyone wake up regularly to try to acquire the lock. We also keep the donation mechanism, so that whenever someone tries to take the lock and fails, that thread donates the remainder of its timeslice to the current lock holder. After unlocking a Lock, the unlocking thread calls WaitQueue::wake_one, which unblocks the next thread in queue. 2019-12-01 05:57:20 -05:00			`};`