server_manager: use multi wait API
This commit is contained in:
Liam
parent
9404633bfd
commit
6810929f6a
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@ -20,50 +20,91 @@
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namespace Service {
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constexpr size_t MaximumWaitObjects = 0x40;
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enum HandleType {
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enum class UserDataTag {
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Port,
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Session,
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DeferEvent,
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Event,
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};
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ServerManager::ServerManager(Core::System& system) : m_system{system}, m_serve_mutex{system} {
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class Port : public MultiWaitHolder, public Common::IntrusiveListBaseNode<Port> {
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public:
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explicit Port(Kernel::KServerPort* server_port, SessionRequestHandlerFactory&& handler_factory)
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: MultiWaitHolder(server_port), m_handler_factory(std::move(handler_factory)) {
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this->SetUserData(static_cast<uintptr_t>(UserDataTag::Port));
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}
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~Port() {
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this->GetNativeHandle()->Close();
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}
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SessionRequestHandlerPtr CreateHandler() {
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return m_handler_factory();
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}
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private:
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const SessionRequestHandlerFactory m_handler_factory;
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};
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class Session : public MultiWaitHolder, public Common::IntrusiveListBaseNode<Session> {
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public:
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explicit Session(Kernel::KServerSession* server_session,
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std::shared_ptr<SessionRequestManager>&& manager)
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: MultiWaitHolder(server_session), m_manager(std::move(manager)) {
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this->SetUserData(static_cast<uintptr_t>(UserDataTag::Session));
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}
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~Session() {
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this->GetNativeHandle()->Close();
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}
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std::shared_ptr<SessionRequestManager>& GetManager() {
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return m_manager;
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}
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std::shared_ptr<HLERequestContext>& GetContext() {
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return m_context;
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}
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private:
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std::shared_ptr<SessionRequestManager> m_manager;
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std::shared_ptr<HLERequestContext> m_context;
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};
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ServerManager::ServerManager(Core::System& system) : m_system{system}, m_selection_mutex{system} {
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// Initialize event.
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m_event = Kernel::KEvent::Create(system.Kernel());
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m_event->Initialize(nullptr);
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m_wakeup_event = Kernel::KEvent::Create(system.Kernel());
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m_wakeup_event->Initialize(nullptr);
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// Register event.
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Kernel::KEvent::Register(system.Kernel(), m_event);
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Kernel::KEvent::Register(system.Kernel(), m_wakeup_event);
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// Link to holder.
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m_wakeup_holder.emplace(std::addressof(m_wakeup_event->GetReadableEvent()));
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m_wakeup_holder->LinkToMultiWait(std::addressof(m_deferred_list));
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}
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ServerManager::~ServerManager() {
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// Signal stop.
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m_stop_source.request_stop();
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m_event->Signal();
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m_wakeup_event->Signal();
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// Wait for processing to stop.
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m_stopped.Wait();
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m_threads.clear();
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// Clean up server ports.
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for (const auto& [port, handler] : m_ports) {
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port->Close();
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// Clean up ports.
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for (auto it = m_servers.begin(); it != m_servers.end(); it = m_servers.erase(it)) {
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delete std::addressof(*it);
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}
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// Clean up sessions.
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for (const auto& [session, manager] : m_sessions) {
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session->Close();
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for (auto it = m_sessions.begin(); it != m_sessions.end(); it = m_sessions.erase(it)) {
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delete std::addressof(*it);
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}
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for (const auto& request : m_deferrals) {
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request.session->Close();
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}
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// Close event.
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m_event->GetReadableEvent().Close();
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m_event->Close();
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// Close wakeup event.
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m_wakeup_event->GetReadableEvent().Close();
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m_wakeup_event->Close();
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if (m_deferral_event) {
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m_deferral_event->GetReadableEvent().Close();
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@ -75,19 +116,19 @@ void ServerManager::RunServer(std::unique_ptr<ServerManager>&& server_manager) {
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server_manager->m_system.RunServer(std::move(server_manager));
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}
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Result ServerManager::RegisterSession(Kernel::KServerSession* session,
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Result ServerManager::RegisterSession(Kernel::KServerSession* server_session,
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std::shared_ptr<SessionRequestManager> manager) {
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ASSERT(m_sessions.size() + m_ports.size() < MaximumWaitObjects);
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// We are taking ownership of the server session, so don't open it.
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auto* session = new Session(server_session, std::move(manager));
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// Begin tracking the server session.
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{
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std::scoped_lock ll{m_list_mutex};
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m_sessions.emplace(session, std::move(manager));
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std::scoped_lock ll{m_deferred_list_mutex};
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m_sessions.push_back(*session);
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}
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// Signal the wakeup event.
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m_event->Signal();
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// Register to wait on the session.
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this->LinkToDeferredList(session);
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R_SUCCEED();
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}
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@ -95,21 +136,22 @@ Result ServerManager::RegisterSession(Kernel::KServerSession* session,
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Result ServerManager::RegisterNamedService(const std::string& service_name,
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SessionRequestHandlerFactory&& handler_factory,
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u32 max_sessions) {
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ASSERT(m_sessions.size() + m_ports.size() < MaximumWaitObjects);
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// Add the new server to sm: and get the moved server port.
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Kernel::KServerPort* server_port{};
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R_ASSERT(m_system.ServiceManager().RegisterService(std::addressof(server_port), service_name,
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max_sessions, handler_factory));
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// We are taking ownership of the server port, so don't open it.
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auto* server = new Port(server_port, std::move(handler_factory));
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// Begin tracking the server port.
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{
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std::scoped_lock ll{m_list_mutex};
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m_ports.emplace(server_port, std::move(handler_factory));
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std::scoped_lock ll{m_deferred_list_mutex};
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m_servers.push_back(*server);
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}
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// Signal the wakeup event.
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m_event->Signal();
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// Register to wait on the server port.
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this->LinkToDeferredList(server);
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R_SUCCEED();
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}
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@ -127,8 +169,6 @@ Result ServerManager::RegisterNamedService(const std::string& service_name,
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Result ServerManager::ManageNamedPort(const std::string& service_name,
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SessionRequestHandlerFactory&& handler_factory,
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u32 max_sessions) {
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ASSERT(m_sessions.size() + m_ports.size() < MaximumWaitObjects);
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// Create a new port.
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auto* port = Kernel::KPort::Create(m_system.Kernel());
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port->Initialize(max_sessions, false, 0);
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@ -149,12 +189,18 @@ Result ServerManager::ManageNamedPort(const std::string& service_name,
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// Open a new reference to the server port.
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port->GetServerPort().Open();
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// Begin tracking the server port.
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// Transfer ownership into a new port object.
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auto* server = new Port(std::addressof(port->GetServerPort()), std::move(handler_factory));
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// Begin tracking the port.
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{
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std::scoped_lock ll{m_list_mutex};
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m_ports.emplace(std::addressof(port->GetServerPort()), std::move(handler_factory));
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std::scoped_lock ll{m_deferred_list_mutex};
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m_servers.push_back(*server);
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}
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// Register to wait on the port.
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this->LinkToDeferredList(server);
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// We succeeded.
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R_SUCCEED();
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}
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@ -173,6 +219,11 @@ Result ServerManager::ManageDeferral(Kernel::KEvent** out_event) {
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// Set the output.
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*out_event = m_deferral_event;
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// Register to wait on the event.
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m_deferral_holder.emplace(std::addressof(m_deferral_event->GetReadableEvent()));
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m_deferral_holder->SetUserData(static_cast<uintptr_t>(UserDataTag::DeferEvent));
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this->LinkToDeferredList(std::addressof(*m_deferral_holder));
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// We succeeded.
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R_SUCCEED();
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}
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@ -191,270 +242,185 @@ Result ServerManager::LoopProcess() {
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R_RETURN(this->LoopProcessImpl());
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}
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void ServerManager::LinkToDeferredList(MultiWaitHolder* holder) {
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// Link.
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{
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std::scoped_lock lk{m_deferred_list_mutex};
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holder->LinkToMultiWait(std::addressof(m_deferred_list));
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}
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// Signal the wakeup event.
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m_wakeup_event->Signal();
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}
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void ServerManager::LinkDeferred() {
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std::scoped_lock lk{m_deferred_list_mutex};
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m_multi_wait.MoveAll(std::addressof(m_deferred_list));
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}
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MultiWaitHolder* ServerManager::WaitSignaled() {
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// Ensure we are the only thread waiting for this server.
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std::scoped_lock lk{m_selection_mutex};
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while (true) {
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this->LinkDeferred();
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// If we're done, return before we start waiting.
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if (m_stop_source.stop_requested()) {
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return nullptr;
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}
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auto* selected = m_multi_wait.WaitAny(m_system.Kernel());
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if (selected == std::addressof(*m_wakeup_holder)) {
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// Clear and restart if we were woken up.
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m_wakeup_event->Clear();
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} else {
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// Unlink and handle the event.
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selected->UnlinkFromMultiWait();
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return selected;
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}
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}
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}
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Result ServerManager::Process(MultiWaitHolder* holder) {
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switch (static_cast<UserDataTag>(holder->GetUserData())) {
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case UserDataTag::Session:
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R_RETURN(this->OnSessionEvent(static_cast<Session*>(holder)));
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case UserDataTag::Port:
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R_RETURN(this->OnPortEvent(static_cast<Port*>(holder)));
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case UserDataTag::DeferEvent:
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R_RETURN(this->OnDeferralEvent());
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default:
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UNREACHABLE();
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}
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}
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bool ServerManager::WaitAndProcessImpl() {
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if (auto* signaled_holder = this->WaitSignaled(); signaled_holder != nullptr) {
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R_ASSERT(this->Process(signaled_holder));
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return true;
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} else {
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return false;
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}
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}
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Result ServerManager::LoopProcessImpl() {
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while (!m_stop_source.stop_requested()) {
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R_TRY(this->WaitAndProcessImpl());
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this->WaitAndProcessImpl();
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}
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R_SUCCEED();
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}
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Result ServerManager::WaitAndProcessImpl() {
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Kernel::KScopedAutoObject<Kernel::KSynchronizationObject> wait_obj;
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HandleType wait_type{};
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// Ensure we are the only thread waiting for this server.
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std::unique_lock sl{m_serve_mutex};
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// If we're done, return before we start waiting.
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R_SUCCEED_IF(m_stop_source.stop_requested());
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// Wait for a tracked object to become signaled.
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{
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s32 num_objs{};
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std::array<HandleType, MaximumWaitObjects> wait_types{};
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std::array<Kernel::KSynchronizationObject*, MaximumWaitObjects> wait_objs{};
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const auto AddWaiter{
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[&](Kernel::KSynchronizationObject* synchronization_object, HandleType type) {
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// Open a new reference to the object.
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synchronization_object->Open();
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// Insert into the list.
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wait_types[num_objs] = type;
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wait_objs[num_objs++] = synchronization_object;
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}};
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{
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std::scoped_lock ll{m_list_mutex};
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// Add all of our ports.
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for (const auto& [port, handler] : m_ports) {
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AddWaiter(port, HandleType::Port);
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}
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// Add all of our sessions.
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for (const auto& [session, manager] : m_sessions) {
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AddWaiter(session, HandleType::Session);
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}
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}
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// Add the deferral wakeup event.
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if (m_deferral_event != nullptr) {
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AddWaiter(std::addressof(m_deferral_event->GetReadableEvent()), HandleType::DeferEvent);
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}
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// Add the wakeup event.
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AddWaiter(std::addressof(m_event->GetReadableEvent()), HandleType::Event);
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// Clean up extra references on exit.
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SCOPE_EXIT({
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for (s32 i = 0; i < num_objs; i++) {
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wait_objs[i]->Close();
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}
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});
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// Wait for a signal.
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s32 out_index{-1};
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R_TRY_CATCH(Kernel::KSynchronizationObject::Wait(m_system.Kernel(), &out_index,
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wait_objs.data(), num_objs, -1)) {
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R_CATCH(Kernel::ResultSessionClosed) {
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// On session closed, index is updated and we don't want to return an error.
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}
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}
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R_END_TRY_CATCH;
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ASSERT(out_index >= 0 && out_index < num_objs);
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// Set the output index.
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wait_obj = wait_objs[out_index];
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wait_type = wait_types[out_index];
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}
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// Process what we just received, temporarily removing the object so it is
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// not processed concurrently by another thread.
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{
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switch (wait_type) {
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case HandleType::Port: {
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// Port signaled.
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auto* port = wait_obj->DynamicCast<Kernel::KServerPort*>();
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SessionRequestHandlerFactory handler_factory;
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// Remove from tracking.
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{
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std::scoped_lock ll{m_list_mutex};
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ASSERT(m_ports.contains(port));
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m_ports.at(port).swap(handler_factory);
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m_ports.erase(port);
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}
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// Allow other threads to serve.
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sl.unlock();
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// Finish.
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R_RETURN(this->OnPortEvent(port, std::move(handler_factory)));
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}
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case HandleType::Session: {
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// Session signaled.
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auto* session = wait_obj->DynamicCast<Kernel::KServerSession*>();
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std::shared_ptr<SessionRequestManager> manager;
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// Remove from tracking.
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{
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std::scoped_lock ll{m_list_mutex};
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ASSERT(m_sessions.contains(session));
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m_sessions.at(session).swap(manager);
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m_sessions.erase(session);
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}
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// Allow other threads to serve.
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sl.unlock();
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// Finish.
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R_RETURN(this->OnSessionEvent(session, std::move(manager)));
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}
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case HandleType::DeferEvent: {
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// Clear event.
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ASSERT(R_SUCCEEDED(m_deferral_event->Clear()));
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// Drain the list of deferrals while we process.
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std::list<RequestState> deferrals;
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{
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std::scoped_lock ll{m_list_mutex};
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m_deferrals.swap(deferrals);
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}
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// Allow other threads to serve.
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sl.unlock();
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// Finish.
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R_RETURN(this->OnDeferralEvent(std::move(deferrals)));
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}
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case HandleType::Event: {
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// Clear event and finish.
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R_RETURN(m_event->Clear());
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}
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default: {
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UNREACHABLE();
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}
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}
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}
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}
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Result ServerManager::OnPortEvent(Kernel::KServerPort* port,
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SessionRequestHandlerFactory&& handler_factory) {
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Result ServerManager::OnPortEvent(Port* server) {
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// Accept a new server session.
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Kernel::KServerSession* session = port->AcceptSession();
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ASSERT(session != nullptr);
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auto* server_port = static_cast<Kernel::KServerPort*>(server->GetNativeHandle());
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Kernel::KServerSession* server_session = server_port->AcceptSession();
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ASSERT(server_session != nullptr);
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// Create the session manager and install the handler.
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auto manager = std::make_shared<SessionRequestManager>(m_system.Kernel(), *this);
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manager->SetSessionHandler(handler_factory());
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manager->SetSessionHandler(server->CreateHandler());
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// Track the server session.
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{
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std::scoped_lock ll{m_list_mutex};
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m_ports.emplace(port, std::move(handler_factory));
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m_sessions.emplace(session, std::move(manager));
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}
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// Create and register the new session.
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this->RegisterSession(server_session, std::move(manager));
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// Signal the wakeup event.
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m_event->Signal();
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// Resume tracking the port.
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this->LinkToDeferredList(server);
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// We succeeded.
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R_SUCCEED();
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}
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Result ServerManager::OnSessionEvent(Kernel::KServerSession* session,
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std::shared_ptr<SessionRequestManager>&& manager) {
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Result rc{ResultSuccess};
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Result ServerManager::OnSessionEvent(Session* session) {
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Result res = ResultSuccess;
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// Try to receive a message.
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std::shared_ptr<HLERequestContext> context;
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rc = session->ReceiveRequestHLE(&context, manager);
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auto* server_session = static_cast<Kernel::KServerSession*>(session->GetNativeHandle());
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res = server_session->ReceiveRequestHLE(&session->GetContext(), session->GetManager());
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// If the session has been closed, we're done.
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if (rc == Kernel::ResultSessionClosed) {
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// Close the session.
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session->Close();
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// Finish.
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if (res == Kernel::ResultSessionClosed) {
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this->DestroySession(session);
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R_SUCCEED();
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}
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ASSERT(R_SUCCEEDED(rc));
|
||||
|
||||
RequestState request{
|
||||
.session = session,
|
||||
.context = std::move(context),
|
||||
.manager = std::move(manager),
|
||||
};
|
||||
R_ASSERT(res);
|
||||
|
||||
// Complete the sync request with deferral handling.
|
||||
R_RETURN(this->CompleteSyncRequest(std::move(request)));
|
||||
R_RETURN(this->CompleteSyncRequest(session));
|
||||
}
|
||||
|
||||
Result ServerManager::CompleteSyncRequest(RequestState&& request) {
|
||||
Result rc{ResultSuccess};
|
||||
Result service_rc{ResultSuccess};
|
||||
Result ServerManager::CompleteSyncRequest(Session* session) {
|
||||
Result res = ResultSuccess;
|
||||
Result service_res = ResultSuccess;
|
||||
|
||||
// Mark the request as not deferred.
|
||||
request.context->SetIsDeferred(false);
|
||||
session->GetContext()->SetIsDeferred(false);
|
||||
|
||||
// Complete the request. We have exclusive access to this session.
|
||||
service_rc = request.manager->CompleteSyncRequest(request.session, *request.context);
|
||||
auto* server_session = static_cast<Kernel::KServerSession*>(session->GetNativeHandle());
|
||||
service_res =
|
||||
session->GetManager()->CompleteSyncRequest(server_session, *session->GetContext());
|
||||
|
||||
// If we've been deferred, we're done.
|
||||
if (request.context->GetIsDeferred()) {
|
||||
// Insert into deferral list.
|
||||
std::scoped_lock ll{m_list_mutex};
|
||||
m_deferrals.emplace_back(std::move(request));
|
||||
if (session->GetContext()->GetIsDeferred()) {
|
||||
// Insert into deferred session list.
|
||||
std::scoped_lock ll{m_deferred_list_mutex};
|
||||
m_deferred_sessions.push_back(session);
|
||||
|
||||
// Finish.
|
||||
R_SUCCEED();
|
||||
}
|
||||
|
||||
// Send the reply.
|
||||
rc = request.session->SendReplyHLE();
|
||||
res = server_session->SendReplyHLE();
|
||||
|
||||
// If the session has been closed, we're done.
|
||||
if (rc == Kernel::ResultSessionClosed || service_rc == IPC::ResultSessionClosed) {
|
||||
// Close the session.
|
||||
request.session->Close();
|
||||
|
||||
// Finish.
|
||||
if (res == Kernel::ResultSessionClosed || service_res == IPC::ResultSessionClosed) {
|
||||
this->DestroySession(session);
|
||||
R_SUCCEED();
|
||||
}
|
||||
|
||||
ASSERT(R_SUCCEEDED(rc));
|
||||
ASSERT(R_SUCCEEDED(service_rc));
|
||||
R_ASSERT(res);
|
||||
R_ASSERT(service_res);
|
||||
|
||||
// Reinsert the session.
|
||||
{
|
||||
std::scoped_lock ll{m_list_mutex};
|
||||
m_sessions.emplace(request.session, std::move(request.manager));
|
||||
}
|
||||
// We succeeded, so we can process future messages on this session.
|
||||
this->LinkToDeferredList(session);
|
||||
|
||||
// Signal the wakeup event.
|
||||
m_event->Signal();
|
||||
|
||||
// We succeeded.
|
||||
R_SUCCEED();
|
||||
}
|
||||
|
||||
Result ServerManager::OnDeferralEvent(std::list<RequestState>&& deferrals) {
|
||||
ON_RESULT_FAILURE {
|
||||
std::scoped_lock ll{m_list_mutex};
|
||||
m_deferrals.splice(m_deferrals.end(), deferrals);
|
||||
};
|
||||
Result ServerManager::OnDeferralEvent() {
|
||||
// Clear event before grabbing the list.
|
||||
m_deferral_event->Clear();
|
||||
|
||||
while (!deferrals.empty()) {
|
||||
RequestState request = deferrals.front();
|
||||
deferrals.pop_front();
|
||||
// Get and clear list.
|
||||
const auto deferrals = [&] {
|
||||
std::scoped_lock lk{m_deferred_list_mutex};
|
||||
return std::move(m_deferred_sessions);
|
||||
}();
|
||||
|
||||
// Try again to complete the request.
|
||||
R_TRY(this->CompleteSyncRequest(std::move(request)));
|
||||
// Relink deferral event.
|
||||
this->LinkToDeferredList(std::addressof(*m_deferral_holder));
|
||||
|
||||
// For each session, try again to complete the request.
|
||||
for (auto* session : deferrals) {
|
||||
R_ASSERT(this->CompleteSyncRequest(session));
|
||||
}
|
||||
|
||||
R_SUCCEED();
|
||||
}
|
||||
|
||||
void ServerManager::DestroySession(Session* session) {
|
||||
// Unlink.
|
||||
{
|
||||
std::scoped_lock lk{m_deferred_list_mutex};
|
||||
m_sessions.erase(m_sessions.iterator_to(*session));
|
||||
}
|
||||
|
||||
// Free the session.
|
||||
delete session;
|
||||
}
|
||||
|
||||
} // namespace Service
|
||||
|
|
|
|||
|
|
@ -3,17 +3,16 @@
|
|||
|
||||
#pragma once
|
||||
|
||||
#include <functional>
|
||||
#include <list>
|
||||
#include <map>
|
||||
#include <mutex>
|
||||
#include <string_view>
|
||||
#include <optional>
|
||||
#include <vector>
|
||||
|
||||
#include "common/polyfill_thread.h"
|
||||
#include "common/thread.h"
|
||||
#include "core/hle/result.h"
|
||||
#include "core/hle/service/hle_ipc.h"
|
||||
#include "core/hle/service/os/multi_wait.h"
|
||||
#include "core/hle/service/os/mutex.h"
|
||||
|
||||
namespace Core {
|
||||
|
|
@ -24,11 +23,13 @@ namespace Kernel {
|
|||
class KEvent;
|
||||
class KServerPort;
|
||||
class KServerSession;
|
||||
class KSynchronizationObject;
|
||||
} // namespace Kernel
|
||||
|
||||
namespace Service {
|
||||
|
||||
class Port;
|
||||
class Session;
|
||||
|
||||
class ServerManager {
|
||||
public:
|
||||
explicit ServerManager(Core::System& system);
|
||||
|
|
@ -52,34 +53,40 @@ public:
|
|||
static void RunServer(std::unique_ptr<ServerManager>&& server);
|
||||
|
||||
private:
|
||||
struct RequestState;
|
||||
|
||||
void LinkToDeferredList(MultiWaitHolder* holder);
|
||||
void LinkDeferred();
|
||||
MultiWaitHolder* WaitSignaled();
|
||||
Result Process(MultiWaitHolder* holder);
|
||||
bool WaitAndProcessImpl();
|
||||
Result LoopProcessImpl();
|
||||
Result WaitAndProcessImpl();
|
||||
Result OnPortEvent(Kernel::KServerPort* port, SessionRequestHandlerFactory&& handler_factory);
|
||||
Result OnSessionEvent(Kernel::KServerSession* session,
|
||||
std::shared_ptr<SessionRequestManager>&& manager);
|
||||
Result OnDeferralEvent(std::list<RequestState>&& deferrals);
|
||||
Result CompleteSyncRequest(RequestState&& state);
|
||||
|
||||
Result OnPortEvent(Port* port);
|
||||
Result OnSessionEvent(Session* session);
|
||||
Result OnDeferralEvent();
|
||||
Result CompleteSyncRequest(Session* session);
|
||||
|
||||
private:
|
||||
void DestroySession(Session* session);
|
||||
|
||||
private:
|
||||
Core::System& m_system;
|
||||
Mutex m_serve_mutex;
|
||||
std::mutex m_list_mutex;
|
||||
Mutex m_selection_mutex;
|
||||
|
||||
// Guest state tracking
|
||||
std::map<Kernel::KServerPort*, SessionRequestHandlerFactory> m_ports{};
|
||||
std::map<Kernel::KServerSession*, std::shared_ptr<SessionRequestManager>> m_sessions{};
|
||||
Kernel::KEvent* m_event{};
|
||||
// Events
|
||||
Kernel::KEvent* m_wakeup_event{};
|
||||
Kernel::KEvent* m_deferral_event{};
|
||||
|
||||
// Deferral tracking
|
||||
struct RequestState {
|
||||
Kernel::KServerSession* session;
|
||||
std::shared_ptr<HLERequestContext> context;
|
||||
std::shared_ptr<SessionRequestManager> manager;
|
||||
};
|
||||
std::list<RequestState> m_deferrals{};
|
||||
// Deferred wait list
|
||||
std::mutex m_deferred_list_mutex{};
|
||||
MultiWait m_deferred_list{};
|
||||
|
||||
// Guest state tracking
|
||||
MultiWait m_multi_wait{};
|
||||
Common::IntrusiveListBaseTraits<Port>::ListType m_servers{};
|
||||
Common::IntrusiveListBaseTraits<Session>::ListType m_sessions{};
|
||||
std::list<Session*> m_deferred_sessions{};
|
||||
std::optional<MultiWaitHolder> m_wakeup_holder{};
|
||||
std::optional<MultiWaitHolder> m_deferral_holder{};
|
||||
|
||||
// Host state tracking
|
||||
Common::Event m_stopped{};
|
||||
|
|
|
|||
Reference in New Issue