mirror of https://github.com/yuzu-emu/yuzu.git
93 lines
2.5 KiB
C++
93 lines
2.5 KiB
C++
// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include "core/hle/kernel/k_spin_lock.h"
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#include "core/hle/kernel/k_thread.h"
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#include "core/hle/kernel/k_timer_task.h"
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namespace Kernel {
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class KHardwareTimerBase {
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public:
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explicit KHardwareTimerBase(KernelCore& kernel) : m_kernel{kernel} {}
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void CancelTask(KTimerTask* task) {
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KScopedDisableDispatch dd{m_kernel};
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KScopedSpinLock lk{m_lock};
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if (const s64 task_time = task->GetTime(); task_time > 0) {
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this->RemoveTaskFromTree(task);
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}
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}
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protected:
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KSpinLock& GetLock() {
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return m_lock;
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}
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s64 DoInterruptTaskImpl(s64 cur_time) {
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// We want to handle all tasks, returning the next time that a task is scheduled.
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while (true) {
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// Get the next task. If there isn't one, return 0.
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KTimerTask* task = m_next_task;
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if (task == nullptr) {
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return 0;
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}
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// If the task needs to be done in the future, do it in the future and not now.
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if (const s64 task_time = task->GetTime(); task_time > cur_time) {
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return task_time;
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}
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// Remove the task from the tree of tasks, and update our next task.
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this->RemoveTaskFromTree(task);
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// Handle the task.
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task->OnTimer();
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}
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}
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bool RegisterAbsoluteTaskImpl(KTimerTask* task, s64 task_time) {
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ASSERT(task_time > 0);
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// Set the task's time, and insert it into our tree.
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task->SetTime(task_time);
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m_task_tree.insert(*task);
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// Update our next task if relevant.
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if (m_next_task != nullptr && m_next_task->GetTime() <= task_time) {
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return false;
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}
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m_next_task = task;
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return true;
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}
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private:
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void RemoveTaskFromTree(KTimerTask* task) {
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// Erase from the tree.
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auto it = m_task_tree.erase(m_task_tree.iterator_to(*task));
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// Clear the task's scheduled time.
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task->SetTime(0);
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// Update our next task if relevant.
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if (m_next_task == task) {
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m_next_task = (it != m_task_tree.end()) ? std::addressof(*it) : nullptr;
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}
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}
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protected:
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KernelCore& m_kernel;
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private:
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using TimerTaskTree = Common::IntrusiveRedBlackTreeBaseTraits<KTimerTask>::TreeType<KTimerTask>;
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KSpinLock m_lock{};
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TimerTaskTree m_task_tree{};
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KTimerTask* m_next_task{};
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};
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} // namespace Kernel
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