mirror of
https://github.com/Atmosphere-NX/Atmosphere
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111 lines
3.5 KiB
C++
111 lines
3.5 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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#include <mesosphere.hpp>
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namespace ams::kern {
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void KWorkerTaskManager::Initialize(WorkerType wt, s32 priority) {
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/* Set type, other members already initialized in constructor. */
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m_type = wt;
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/* Reserve a thread from the system limit. */
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MESOSPHERE_ABORT_UNLESS(Kernel::GetSystemResourceLimit().Reserve(ams::svc::LimitableResource_ThreadCountMax, 1));
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/* Create a new thread. */
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m_thread = KThread::Create();
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MESOSPHERE_ABORT_UNLESS(m_thread != nullptr);
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/* Launch the new thread. */
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MESOSPHERE_R_ABORT_UNLESS(KThread::InitializeKernelThread(m_thread, ThreadFunction, reinterpret_cast<uintptr_t>(this), priority, cpu::NumCores - 1));
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/* Register the new thread. */
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KThread::Register(m_thread);
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/* Run the thread. */
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m_thread->Run();
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}
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void KWorkerTaskManager::AddTask(WorkerType type, KWorkerTask *task) {
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MESOSPHERE_ASSERT(type <= WorkerType_Count);
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Kernel::GetWorkerTaskManager(type).AddTask(task);
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}
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void KWorkerTaskManager::ThreadFunction(uintptr_t arg) {
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reinterpret_cast<KWorkerTaskManager *>(arg)->ThreadFunctionImpl();
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}
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void KWorkerTaskManager::ThreadFunctionImpl() {
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while (true) {
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KWorkerTask *task = nullptr;
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/* Get a worker task. */
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{
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KScopedSchedulerLock sl;
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task = this->GetTask();
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if (task == nullptr) {
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/* If there's nothing to do, set ourselves as waiting. */
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m_active = false;
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m_thread->SetState(KThread::ThreadState_Waiting);
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continue;
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}
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m_active = true;
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}
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/* Do the task. */
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task->DoWorkerTask();
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}
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}
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KWorkerTask *KWorkerTaskManager::GetTask() {
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MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
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KWorkerTask *next = m_head_task;
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if (next) {
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/* Advance the list. */
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if (m_head_task == m_tail_task) {
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m_head_task = nullptr;
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m_tail_task = nullptr;
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} else {
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m_head_task = m_head_task->GetNextTask();
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}
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/* Clear the next task's next. */
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next->SetNextTask(nullptr);
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}
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return next;
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}
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void KWorkerTaskManager::AddTask(KWorkerTask *task) {
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KScopedSchedulerLock sl;
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MESOSPHERE_ASSERT(task->GetNextTask() == nullptr);
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/* Insert the task. */
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if (m_tail_task) {
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m_tail_task->SetNextTask(task);
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m_tail_task = task;
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} else {
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m_head_task = task;
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m_tail_task = task;
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/* Make ourselves active if we need to. */
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if (!m_active) {
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m_thread->SetState(KThread::ThreadState_Runnable);
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}
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}
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}
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}
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