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Diffstat (limited to '')
-rw-r--r-- | src/core/hle/service/server_manager.cpp | 448 |
1 files changed, 448 insertions, 0 deletions
diff --git a/src/core/hle/service/server_manager.cpp b/src/core/hle/service/server_manager.cpp new file mode 100644 index 000000000..bd04cd023 --- /dev/null +++ b/src/core/hle/service/server_manager.cpp @@ -0,0 +1,448 @@ +// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#include "common/scope_exit.h" + +#include "core/core.h" +#include "core/hle/kernel/k_client_port.h" +#include "core/hle/kernel/k_client_session.h" +#include "core/hle/kernel/k_event.h" +#include "core/hle/kernel/k_object_name.h" +#include "core/hle/kernel/k_port.h" +#include "core/hle/kernel/k_server_port.h" +#include "core/hle/kernel/k_server_session.h" +#include "core/hle/kernel/k_synchronization_object.h" +#include "core/hle/kernel/svc_results.h" +#include "core/hle/service/hle_ipc.h" +#include "core/hle/service/ipc_helpers.h" +#include "core/hle/service/server_manager.h" +#include "core/hle/service/sm/sm.h" + +namespace Service { + +constexpr size_t MaximumWaitObjects = 0x40; + +enum HandleType { + Port, + Session, + DeferEvent, + Event, +}; + +ServerManager::ServerManager(Core::System& system) : m_system{system}, m_serve_mutex{system} { + // Initialize event. + m_event = Kernel::KEvent::Create(system.Kernel()); + m_event->Initialize(nullptr); +} + +ServerManager::~ServerManager() { + // Signal stop. + m_stop_source.request_stop(); + m_event->Signal(); + + // Wait for processing to stop. + m_stopped.wait(false); + m_threads.clear(); + + // Clean up ports. + for (const auto& [port, handler] : m_ports) { + port->Close(); + } + + // Clean up sessions. + for (const auto& [session, manager] : m_sessions) { + session->Close(); + } + + for (const auto& request : m_deferrals) { + request.session->Close(); + } + + // Close event. + m_event->GetReadableEvent().Close(); + m_event->Close(); + + if (m_deferral_event) { + m_deferral_event->GetReadableEvent().Close(); + // Write event is owned by ServiceManager + } +} + +void ServerManager::RunServer(std::unique_ptr<ServerManager>&& server_manager) { + server_manager->m_system.RunServer(std::move(server_manager)); +} + +Result ServerManager::RegisterSession(Kernel::KServerSession* session, + std::shared_ptr<SessionRequestManager> manager) { + ASSERT(m_sessions.size() + m_ports.size() < MaximumWaitObjects); + + // We are taking ownership of the server session, so don't open it. + // Begin tracking the server session. + { + std::scoped_lock ll{m_list_mutex}; + m_sessions.emplace(session, std::move(manager)); + } + + // Signal the wakeup event. + m_event->Signal(); + + R_SUCCEED(); +} + +Result ServerManager::RegisterNamedService(const std::string& service_name, + std::shared_ptr<SessionRequestHandler>&& handler, + u32 max_sessions) { + ASSERT(m_sessions.size() + m_ports.size() < MaximumWaitObjects); + + // Add the new server to sm:. + ASSERT(R_SUCCEEDED( + m_system.ServiceManager().RegisterService(service_name, max_sessions, handler))); + + // Get the registered port. + auto port = m_system.ServiceManager().GetServicePort(service_name); + ASSERT(port.Succeeded()); + + // Open a new reference to the server port. + (*port)->GetServerPort().Open(); + + // Begin tracking the server port. + { + std::scoped_lock ll{m_list_mutex}; + m_ports.emplace(std::addressof((*port)->GetServerPort()), std::move(handler)); + } + + // Signal the wakeup event. + m_event->Signal(); + + R_SUCCEED(); +} + +Result ServerManager::ManageNamedPort(const std::string& service_name, + std::shared_ptr<SessionRequestHandler>&& handler, + u32 max_sessions) { + ASSERT(m_sessions.size() + m_ports.size() < MaximumWaitObjects); + + // Create a new port. + auto* port = Kernel::KPort::Create(m_system.Kernel()); + port->Initialize(max_sessions, false, service_name); + + // Register the port. + Kernel::KPort::Register(m_system.Kernel(), port); + + // Ensure that our reference to the port is closed if we fail to register it. + SCOPE_EXIT({ + port->GetClientPort().Close(); + port->GetServerPort().Close(); + }); + + // Register the object name with the kernel. + R_TRY(Kernel::KObjectName::NewFromName(m_system.Kernel(), std::addressof(port->GetClientPort()), + service_name.c_str())); + + // Open a new reference to the server port. + port->GetServerPort().Open(); + + // Begin tracking the server port. + { + std::scoped_lock ll{m_list_mutex}; + m_ports.emplace(std::addressof(port->GetServerPort()), std::move(handler)); + } + + // We succeeded. + R_SUCCEED(); +} + +Result ServerManager::ManageDeferral(Kernel::KEvent** out_event) { + // Create a new event. + m_deferral_event = Kernel::KEvent::Create(m_system.Kernel()); + ASSERT(m_deferral_event != nullptr); + + // Initialize the event. + m_deferral_event->Initialize(nullptr); + + // Set the output. + *out_event = m_deferral_event; + + // We succeeded. + R_SUCCEED(); +} + +void ServerManager::StartAdditionalHostThreads(const char* name, size_t num_threads) { + for (size_t i = 0; i < num_threads; i++) { + auto thread_name = fmt::format("{}:{}", name, i + 1); + m_threads.emplace_back(m_system.Kernel().RunOnHostCoreThread( + std::move(thread_name), [&] { this->LoopProcessImpl(); })); + } +} + +Result ServerManager::LoopProcess() { + SCOPE_EXIT({ + m_stopped.store(true); + m_stopped.notify_all(); + }); + + R_RETURN(this->LoopProcessImpl()); +} + +Result ServerManager::LoopProcessImpl() { + while (!m_stop_source.stop_requested()) { + R_TRY(this->WaitAndProcessImpl()); + } + + R_SUCCEED(); +} + +Result ServerManager::WaitAndProcessImpl() { + Kernel::KScopedAutoObject<Kernel::KSynchronizationObject> wait_obj; + HandleType wait_type{}; + + // Ensure we are the only thread waiting for this server. + std::unique_lock sl{m_serve_mutex}; + + // If we're done, return before we start waiting. + R_SUCCEED_IF(m_stop_source.stop_requested()); + + // Wait for a tracked object to become signaled. + { + s32 num_objs{}; + std::array<HandleType, MaximumWaitObjects> wait_types{}; + std::array<Kernel::KSynchronizationObject*, MaximumWaitObjects> wait_objs{}; + + const auto AddWaiter{ + [&](Kernel::KSynchronizationObject* synchronization_object, HandleType type) { + // Open a new reference to the object. + synchronization_object->Open(); + + // Insert into the list. + wait_types[num_objs] = type; + wait_objs[num_objs++] = synchronization_object; + }}; + + { + std::scoped_lock ll{m_list_mutex}; + + // Add all of our ports. + for (const auto& [port, handler] : m_ports) { + AddWaiter(port, HandleType::Port); + } + + // Add all of our sessions. + for (const auto& [session, manager] : m_sessions) { + AddWaiter(session, HandleType::Session); + } + } + + // Add the deferral wakeup event. + if (m_deferral_event != nullptr) { + AddWaiter(std::addressof(m_deferral_event->GetReadableEvent()), HandleType::DeferEvent); + } + + // Add the wakeup event. + AddWaiter(std::addressof(m_event->GetReadableEvent()), HandleType::Event); + + // Clean up extra references on exit. + SCOPE_EXIT({ + for (s32 i = 0; i < num_objs; i++) { + wait_objs[i]->Close(); + } + }); + + // Wait for a signal. + s32 out_index{-1}; + R_TRY(Kernel::KSynchronizationObject::Wait(m_system.Kernel(), &out_index, wait_objs.data(), + num_objs, -1)); + ASSERT(out_index >= 0 && out_index < num_objs); + + // Set the output index. + wait_obj = wait_objs[out_index]; + wait_type = wait_types[out_index]; + } + + // Process what we just received, temporarily removing the object so it is + // not processed concurrently by another thread. + { + switch (wait_type) { + case HandleType::Port: { + // Port signaled. + auto* port = wait_obj->DynamicCast<Kernel::KServerPort*>(); + std::shared_ptr<SessionRequestHandler> handler; + + // Remove from tracking. + { + std::scoped_lock ll{m_list_mutex}; + ASSERT(m_ports.contains(port)); + m_ports.at(port).swap(handler); + m_ports.erase(port); + } + + // Allow other threads to serve. + sl.unlock(); + + // Finish. + R_RETURN(this->OnPortEvent(port, std::move(handler))); + } + case HandleType::Session: { + // Session signaled. + auto* session = wait_obj->DynamicCast<Kernel::KServerSession*>(); + std::shared_ptr<SessionRequestManager> manager; + + // Remove from tracking. + { + std::scoped_lock ll{m_list_mutex}; + ASSERT(m_sessions.contains(session)); + m_sessions.at(session).swap(manager); + m_sessions.erase(session); + } + + // Allow other threads to serve. + sl.unlock(); + + // Finish. + R_RETURN(this->OnSessionEvent(session, std::move(manager))); + } + case HandleType::DeferEvent: { + // Clear event. + ASSERT(R_SUCCEEDED(m_deferral_event->Clear())); + + // Drain the list of deferrals while we process. + std::list<RequestState> deferrals; + { + std::scoped_lock ll{m_list_mutex}; + m_deferrals.swap(deferrals); + } + + // Allow other threads to serve. + sl.unlock(); + + // Finish. + R_RETURN(this->OnDeferralEvent(std::move(deferrals))); + } + case HandleType::Event: { + // Clear event and finish. + R_RETURN(m_event->Clear()); + } + default: { + UNREACHABLE(); + } + } + } +} + +Result ServerManager::OnPortEvent(Kernel::KServerPort* port, + std::shared_ptr<SessionRequestHandler>&& handler) { + // Accept a new server session. + Kernel::KServerSession* session = port->AcceptSession(); + ASSERT(session != nullptr); + + // Create the session manager and install the handler. + auto manager = std::make_shared<SessionRequestManager>(m_system.Kernel(), *this); + manager->SetSessionHandler(std::shared_ptr(handler)); + + // Track the server session. + { + std::scoped_lock ll{m_list_mutex}; + m_ports.emplace(port, std::move(handler)); + m_sessions.emplace(session, std::move(manager)); + } + + // Signal the wakeup event. + m_event->Signal(); + + // We succeeded. + R_SUCCEED(); +} + +Result ServerManager::OnSessionEvent(Kernel::KServerSession* session, + std::shared_ptr<SessionRequestManager>&& manager) { + Result rc{ResultSuccess}; + + // Try to receive a message. + std::shared_ptr<HLERequestContext> context; + rc = session->ReceiveRequest(&context, manager); + + // If the session has been closed, we're done. + if (rc == Kernel::ResultSessionClosed) { + // Close the session. + session->Close(); + + // Finish. + R_SUCCEED(); + } + ASSERT(R_SUCCEEDED(rc)); + + RequestState request{ + .session = session, + .context = std::move(context), + .manager = std::move(manager), + }; + + // Complete the sync request with deferral handling. + R_RETURN(this->CompleteSyncRequest(std::move(request))); +} + +Result ServerManager::CompleteSyncRequest(RequestState&& request) { + Result rc{ResultSuccess}; + Result service_rc{ResultSuccess}; + + // Mark the request as not deferred. + request.context->SetIsDeferred(false); + + // Complete the request. We have exclusive access to this session. + service_rc = request.manager->CompleteSyncRequest(request.session, *request.context); + + // 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)); + + // Finish. + R_SUCCEED(); + } + + // Send the reply. + rc = request.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. + R_SUCCEED(); + } + + ASSERT(R_SUCCEEDED(rc)); + ASSERT(R_SUCCEEDED(service_rc)); + + // Reinsert the session. + { + std::scoped_lock ll{m_list_mutex}; + m_sessions.emplace(request.session, std::move(request.manager)); + } + + // 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); + }; + + while (!deferrals.empty()) { + RequestState request = deferrals.front(); + deferrals.pop_front(); + + // Try again to complete the request. + R_TRY(this->CompleteSyncRequest(std::move(request))); + } + + R_SUCCEED(); +} + +} // namespace Service |