mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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66 lines
2.5 KiB
C++
66 lines
2.5 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <mesosphere/kern_common.hpp>
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#include <mesosphere/kern_k_timer_task.hpp>
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#include <mesosphere/kern_k_thread.hpp>
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namespace ams::kern {
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class KWaitObject : public KTimerTask {
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private:
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using Entry = KThread::QueueEntry;
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private:
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Entry root;
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bool timer_used;
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public:
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constexpr KWaitObject() : root(), timer_used() { /* ... */ }
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virtual void OnTimer() override;
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Result Synchronize(s64 timeout);
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private:
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constexpr ALWAYS_INLINE void Enqueue(KThread *add) {
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/* Get the entry associated with the added thread. */
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Entry &add_entry = add->GetSleepingQueueEntry();
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/* Get the entry associated with the end of the queue. */
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KThread *tail = this->root.GetPrev();
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Entry &tail_entry = (tail != nullptr) ? tail->GetSleepingQueueEntry() : this->root;
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/* Link the entries. */
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add_entry.SetPrev(tail);
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add_entry.SetNext(nullptr);
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tail_entry.SetNext(add);
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this->root.SetPrev(add);
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}
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constexpr ALWAYS_INLINE void Remove(KThread *remove) {
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/* Get the entry associated with the thread. */
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Entry &remove_entry = remove->GetSleepingQueueEntry();
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/* Get the entries associated with next and prev. */
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KThread *prev = remove_entry.GetPrev();
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KThread *next = remove_entry.GetNext();
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Entry &prev_entry = (prev != nullptr) ? prev->GetSleepingQueueEntry() : this->root;
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Entry &next_entry = (next != nullptr) ? next->GetSleepingQueueEntry() : this->root;
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/* Unlink. */
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prev_entry.SetNext(next);
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next_entry.SetPrev(prev);
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}
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};
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}
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