mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-12-25 14:11:15 +00:00
229 lines
8.2 KiB
C++
229 lines
8.2 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 <stratosphere.hpp>
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#include "os_thread_manager.hpp"
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#include "os_waitable_manager_impl.hpp"
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#include "os_waitable_holder_base.hpp"
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#include "os_waitable_holder_impl.hpp"
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#include "os_waitable_object_list.hpp"
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namespace ams::os::impl {
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void SetupThreadObjectUnsafe(ThreadType *thread, ThreadImpl *thread_impl, ThreadFunction function, void *arg, void *stack, size_t stack_size, s32 priority) {
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/* Setup objects. */
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new (GetPointer(thread->cs_thread)) impl::InternalCriticalSection;
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new (GetPointer(thread->cv_thread)) impl::InternalConditionVariable;
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new (GetPointer(thread->all_threads_node)) util::IntrusiveListNode;
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new (GetPointer(thread->waitlist)) WaitableObjectList;
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/* Set member variables. */
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thread->thread_impl = (thread_impl != nullptr) ? thread_impl : std::addressof(thread->thread_impl_storage);
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thread->function = function;
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thread->argument = arg;
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thread->stack = stack;
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thread->stack_size = stack_size;
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thread->base_priority = priority;
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thread->suspend_count = 0;
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thread->name_buffer[0] = '\x00';
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thread->name_pointer = thread->name_buffer;
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/* Set internal tls variables. */
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thread->atomic_sf_inline_context = 0;
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/* Mark initialized. */
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thread->state = ThreadType::State_Initialized;
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}
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void ThreadManager::InvokeThread(ThreadType *thread) {
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auto &manager = GetThreadManager();
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manager.SetCurrentThread(thread);
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manager.NotifyThreadNameChanged(thread);
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{
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std::unique_lock lk(GetReference(thread->cs_thread));
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while (thread->state == ThreadType::State_Initialized) {
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GetReference(thread->cv_thread).Wait(GetPointer(thread->cs_thread));
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}
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if (thread->state == ThreadType::State_Started) {
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lk.unlock();
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thread->function(thread->argument);
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}
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}
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manager.CleanupThread();
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}
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ThreadManager::ThreadManager() : impl(std::addressof(main_thread)), total_thread_stack_size(0), num_created_threads(0) {
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this->main_thread.state = ThreadType::State_Started;
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this->SetCurrentThread(std::addressof(this->main_thread));
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this->PlaceThreadObjectUnderThreadManagerSafe(std::addressof(this->main_thread));
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}
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void ThreadManager::CleanupThread() {
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ThreadType *thread = this->GetCurrentThread();
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{
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std::scoped_lock lk(GetReference(thread->cs_thread));
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thread->state = ThreadType::State_Terminated;
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GetReference(thread->cv_thread).Broadcast();
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GetReference(thread->waitlist).SignalAllThreads();
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}
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}
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Result ThreadManager::CreateThread(ThreadType *thread, ThreadFunction function, void *argument, void *stack, size_t stack_size, s32 priority, s32 ideal_core) {
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SetupThreadObjectUnsafe(thread, nullptr, function, argument, stack, stack_size, priority);
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auto guard = SCOPE_GUARD { thread->state = ThreadType::State_NotInitialized; };
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R_TRY(this->impl.CreateThread(thread, ideal_core));
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guard.Cancel();
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this->PlaceThreadObjectUnderThreadManagerSafe(thread);
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return ResultSuccess();
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}
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Result ThreadManager::CreateThread(ThreadType *thread, ThreadFunction function, void *argument, void *stack, size_t stack_size, s32 priority) {
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return this->CreateThread(thread, function, argument, stack, stack_size, priority, this->impl.GetDefaultCoreNumber());
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}
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void ThreadManager::DestroyThread(ThreadType *thread) {
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{
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std::scoped_lock lk(GetReference(thread->cs_thread));
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if (thread->state == ThreadType::State_Initialized) {
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thread->state = ThreadType::State_DestroyedBeforeStarted;
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this->impl.StartThread(thread);
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GetReference(thread->cv_thread).Signal();
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}
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}
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this->impl.WaitForThreadExit(thread);
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AMS_ASSERT(thread->state == ThreadType::State_Initialized);
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{
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std::scoped_lock lk(GetReference(thread->cs_thread));
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/* NOTE: Here Nintendo would cleanup the alias stack. */
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this->impl.DestroyThreadUnsafe(thread);
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thread->state = ThreadType::State_NotInitialized;
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GetReference(thread->waitlist).~WaitableObjectList();
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thread->name_buffer[0] = '\x00';
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{
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std::scoped_lock tlk(this->cs);
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this->EraseFromAllThreadsListUnsafe(thread);
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}
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}
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}
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void ThreadManager::StartThread(ThreadType *thread) {
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std::scoped_lock lk(GetReference(thread->cs_thread));
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AMS_ASSERT(thread->state == ThreadType::State_Initialized);
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this->impl.StartThread(thread);
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thread->state = ThreadType::State_Started;
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GetReference(thread->cv_thread).Signal();
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}
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void ThreadManager::WaitThread(ThreadType *thread) {
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this->impl.WaitForThreadExit(thread);
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{
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std::scoped_lock lk(GetReference(thread->cs_thread));
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/* Note: Here Nintendo would cleanup the alias stack. */
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}
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}
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bool ThreadManager::TryWaitThread(ThreadType *thread) {
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const bool result = this->impl.TryWaitForThreadExit(thread);
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if (result) {
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std::scoped_lock lk(GetReference(thread->cs_thread));
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/* Note: Here Nintendo would cleanup the alias stack. */
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}
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return result;
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}
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s32 ThreadManager::SuspendThread(ThreadType *thread) {
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std::scoped_lock lk(GetReference(thread->cs_thread));
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auto prev_suspend_count = thread->suspend_count;
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AMS_ASSERT(prev_suspend_count < ThreadSuspendCountMax);
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thread->suspend_count = prev_suspend_count + 1;
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if (prev_suspend_count == 0) {
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this->impl.SuspendThreadUnsafe(thread);
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}
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return prev_suspend_count;
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}
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s32 ThreadManager::ResumeThread(ThreadType *thread) {
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std::scoped_lock lk(GetReference(thread->cs_thread));
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auto prev_suspend_count = thread->suspend_count;
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if (prev_suspend_count > 0) {
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thread->suspend_count = prev_suspend_count - 1;
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if (prev_suspend_count == 1) {
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this->impl.ResumeThreadUnsafe(thread);
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}
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}
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return prev_suspend_count;
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}
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void ThreadManager::CancelThreadSynchronization(ThreadType *thread) {
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std::scoped_lock lk(GetReference(thread->cs_thread));
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this->impl.CancelThreadSynchronizationUnsafe(thread);
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}
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/* TODO void ThreadManager::GetThreadContext(ThreadContextInfo *out_context, const ThreadType *thread); */
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void ThreadManager::SetInitialThreadNameUnsafe(ThreadType *thread) {
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if (thread == std::addressof(this->main_thread)) {
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constexpr const char MainThreadName[] = "MainThread";
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static_assert(sizeof(thread->name_buffer) >= sizeof(MainThreadName));
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static_assert(MainThreadName[sizeof(MainThreadName) - 1] == '\x00');
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std::memcpy(thread->name_buffer, MainThreadName, sizeof(MainThreadName));
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} else {
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constexpr const char ThreadNamePrefix[] = "Thread_0x";
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constexpr size_t ThreadNamePrefixSize = sizeof(ThreadNamePrefix) - 1;
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const u64 func = reinterpret_cast<u64>(thread->function);
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static_assert(ThreadNamePrefixSize + sizeof(func) * 2 + 1 <= sizeof(thread->name_buffer));
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std::snprintf(thread->name_buffer, sizeof(thread->name_buffer), "%s%016lX", ThreadNamePrefix, func);
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}
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thread->name_pointer = thread->name_buffer;
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}
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}
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