mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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110 lines
3.5 KiB
C++
110 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 KInterruptTaskManager::TaskQueue::Enqueue(KInterruptTask *task) {
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MESOSPHERE_ASSERT(task != this->head);
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MESOSPHERE_ASSERT(task != this->tail);
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MESOSPHERE_AUDIT(task->GetNextTask() == nullptr);
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/* Insert the task into the queue. */
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if (this->tail != nullptr) {
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this->tail->SetNextTask(task);
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} else {
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this->head = task;
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}
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this->tail = task;
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/* Set the next task for auditing. */
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#if defined (MESOSPHERE_BUILD_FOR_AUDITING)
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task->SetNextTask(GetDummyInterruptTask());
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#endif
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}
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void KInterruptTaskManager::TaskQueue::Dequeue() {
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MESOSPHERE_ASSERT(this->head != nullptr);
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MESOSPHERE_ASSERT(this->tail != nullptr);
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MESOSPHERE_AUDIT(this->tail->GetNextTask() == GetDummyInterruptTask());
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/* Pop the task from the front of the queue. */
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KInterruptTask *old_head = this->head;
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if (this->head == this->tail) {
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this->head = nullptr;
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this->tail = nullptr;
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} else {
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this->head = this->head->GetNextTask();
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}
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#if defined (MESOSPHERE_BUILD_FOR_AUDITING)
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old_head->SetNextTask(nullptr);
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#endif
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}
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void KInterruptTaskManager::ThreadFunction(uintptr_t arg) {
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reinterpret_cast<KInterruptTaskManager *>(arg)->ThreadFunctionImpl();
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}
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void KInterruptTaskManager::ThreadFunctionImpl() {
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MESOSPHERE_ASSERT_THIS();
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while (true) {
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/* Get a task. */
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KInterruptTask *task = nullptr;
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{
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KScopedInterruptDisable di;
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task = this->task_queue.GetHead();
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if (task == nullptr) {
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this->thread->SetState(KThread::ThreadState_Waiting);
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continue;
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}
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this->task_queue.Dequeue();
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}
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/* Do the task. */
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task->DoTask();
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}
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}
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void KInterruptTaskManager::Initialize() {
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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 and initialize the thread. */
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this->thread = KThread::Create();
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MESOSPHERE_ABORT_UNLESS(this->thread != nullptr);
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MESOSPHERE_R_ABORT_UNLESS(KThread::InitializeHighPriorityThread(this->thread, ThreadFunction, reinterpret_cast<uintptr_t>(this)));
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KThread::Register(this->thread);
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/* Run the thread. */
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this->thread->Run();
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}
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void KInterruptTaskManager::EnqueueTask(KInterruptTask *task) {
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MESOSPHERE_ASSERT(!KInterruptManager::AreInterruptsEnabled());
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/* Enqueue the task and signal the scheduler. */
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this->task_queue.Enqueue(task);
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Kernel::GetScheduler().SetInterruptTaskRunnable();
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}
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}
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