Service: Make service registration part of the sm implementation

Also enhances the GetServiceHandle implementation to be more accurate.

src/core/hle/service/sm/sm.h

@@ -0,0 +1,49 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <string>
+#include <unordered_map>
+#include "core/hle/kernel/kernel.h"
+#include "core/hle/result.h"
+#include "core/hle/service/service.h"
+
+namespace Kernel {
+class ClientPort;
+class ClientSession;
+class ServerPort;
+class SessionRequestHandler;
+} // namespace Kernel
+
+namespace Service {
+namespace SM {
+
+constexpr ResultCode ERR_SERVICE_NOT_REGISTERED(1, ErrorModule::SRV, ErrorSummary::WouldBlock,
+                                                ErrorLevel::Temporary); // 0xD0406401
+constexpr ResultCode ERR_MAX_CONNECTIONS_REACHED(2, ErrorModule::SRV, ErrorSummary::WouldBlock,
+                                                 ErrorLevel::Temporary); // 0xD0406402
+constexpr ResultCode ERR_INVALID_NAME_SIZE(5, ErrorModule::SRV, ErrorSummary::WrongArgument,
+                                           ErrorLevel::Permanent); // 0xD9006405
+constexpr ResultCode ERR_ACCESS_DENIED(6, ErrorModule::SRV, ErrorSummary::InvalidArgument,
+                                       ErrorLevel::Permanent); // 0xD8E06406
+constexpr ResultCode ERR_NAME_CONTAINS_NUL(7, ErrorModule::SRV, ErrorSummary::WrongArgument,
+                                           ErrorLevel::Permanent); // 0xD9006407
+
+class ServiceManager {
+public:
+    ResultVal<Kernel::SharedPtr<Kernel::ServerPort>> RegisterService(std::string name,
+                                                                     unsigned int max_sessions);
+    ResultVal<Kernel::SharedPtr<Kernel::ClientPort>> GetServicePort(const std::string& name);
+    ResultVal<Kernel::SharedPtr<Kernel::ClientSession>> ConnectToService(const std::string& name);
+
+private:
+    /// Map of services registered with the "srv:" service, retrieved using GetServiceHandle.
+    std::unordered_map<std::string, Kernel::SharedPtr<Kernel::ClientPort>> registered_services;
+};
+
+extern std::unique_ptr<ServiceManager> g_service_manager;
+
+} // namespace SM
+} // namespace Service