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// Copyright 2018 yuzu emulator team
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2014-12-16 21:38:14 -08:00
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// Licensed under GPLv2 or any later version
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2014-04-11 15:44:21 -07:00
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// Refer to the license.txt file included.
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#pragma once
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2015-06-21 07:44:11 -07:00
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#include <cstddef>
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#include <string>
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#include <unordered_map>
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#include <boost/container/flat_map.hpp>
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#include "common/bit_field.h"
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#include "common/common_types.h"
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#include "core/hle/kernel/hle_ipc.h"
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#include "core/hle/kernel/kernel.h"
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// Namespace Service
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namespace Kernel {
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class ClientPort;
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class ServerPort;
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class ServerSession;
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class HLERequestContext;
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} // namespace Kernel
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namespace Service {
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namespace SM {
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class ServiceManager;
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}
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static const int kMaxPortSize = 8; ///< Maximum size of a port name (8 characters)
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/// Arbitrary default number of maximum connections to an HLE service.
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static const u32 DefaultMaxSessions = 10;
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/**
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* This is an non-templated base of ServiceFramework to reduce code bloat and compilation times, it
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* is not meant to be used directly.
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*
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* @see ServiceFramework
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*/
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class ServiceFrameworkBase : public Kernel::SessionRequestHandler {
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public:
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/// Returns the string identifier used to connect to the service.
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std::string GetServiceName() const {
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return service_name;
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}
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/**
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* Returns the maximum number of sessions that can be connected to this service at the same
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* time.
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*/
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u32 GetMaxSessions() const {
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return max_sessions;
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}
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/// Creates a port pair and registers this service with the given ServiceManager.
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void InstallAsService(SM::ServiceManager& service_manager);
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/// Creates a port pair and registers it on the kernel's global port registry.
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void InstallAsNamedPort();
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/// Creates and returns an unregistered port for the service.
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Kernel::SharedPtr<Kernel::ClientPort> CreatePort();
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void InvokeRequest(Kernel::HLERequestContext& ctx);
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ResultCode HandleSyncRequest(Kernel::HLERequestContext& context) override;
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protected:
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/// Member-function pointer type of SyncRequest handlers.
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template <typename Self>
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using HandlerFnP = void (Self::*)(Kernel::HLERequestContext&);
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private:
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template <typename T>
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friend class ServiceFramework;
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struct FunctionInfoBase {
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u32 expected_header;
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HandlerFnP<ServiceFrameworkBase> handler_callback;
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const char* name;
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};
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using InvokerFn = void(ServiceFrameworkBase* object, HandlerFnP<ServiceFrameworkBase> member,
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Kernel::HLERequestContext& ctx);
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ServiceFrameworkBase(const char* service_name, u32 max_sessions, InvokerFn* handler_invoker);
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~ServiceFrameworkBase();
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void RegisterHandlersBase(const FunctionInfoBase* functions, size_t n);
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void ReportUnimplementedFunction(Kernel::HLERequestContext& ctx, const FunctionInfoBase* info);
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/// Identifier string used to connect to the service.
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std::string service_name;
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/// Maximum number of concurrent sessions that this service can handle.
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u32 max_sessions;
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/**
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* Port where incoming connections will be received. Only created when InstallAsService() or
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* InstallAsNamedPort() are called.
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*/
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Kernel::SharedPtr<Kernel::ServerPort> port;
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/// Function used to safely up-cast pointers to the derived class before invoking a handler.
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InvokerFn* handler_invoker;
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boost::container::flat_map<u32, FunctionInfoBase> handlers;
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};
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/**
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* Framework for implementing HLE services. Dispatches on the header id of incoming SyncRequests
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* based on a table mapping header ids to handler functions. Service implementations should inherit
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* from ServiceFramework using the CRTP (`class Foo : public ServiceFramework<Foo> { ... };`) and
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* populate it with handlers by calling #RegisterHandlers.
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*
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* In order to avoid duplicating code in the binary and exposing too many implementation details in
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* the header, this class is split into a non-templated base (ServiceFrameworkBase) and a template
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* deriving from it (ServiceFramework). The functions in this class will mostly only erase the type
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* of the passed in function pointers and then delegate the actual work to the implementation in the
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* base class.
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*/
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template <typename Self>
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class ServiceFramework : public ServiceFrameworkBase {
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protected:
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/// Contains information about a request type which is handled by the service.
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struct FunctionInfo : FunctionInfoBase {
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// TODO(yuriks): This function could be constexpr, but clang is the only compiler that
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// doesn't emit an ICE or a wrong diagnostic because of the static_cast.
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/**
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* Constructs a FunctionInfo for a function.
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*
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* @param expected_header request header in the command buffer which will trigger dispatch
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* to this handler
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* @param handler_callback member function in this service which will be called to handle
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* the request
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* @param name human-friendly name for the request. Used mostly for logging purposes.
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*/
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FunctionInfo(u32 expected_header, HandlerFnP<Self> handler_callback, const char* name)
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: FunctionInfoBase{
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expected_header,
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// Type-erase member function pointer by casting it down to the base class.
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static_cast<HandlerFnP<ServiceFrameworkBase>>(handler_callback), name} {}
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};
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/**
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* Initializes the handler with no functions installed.
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* @param max_sessions Maximum number of sessions that can be
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* connected to this service at the same time.
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*/
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ServiceFramework(const char* service_name, u32 max_sessions = DefaultMaxSessions)
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: ServiceFrameworkBase(service_name, max_sessions, Invoker) {}
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/// Registers handlers in the service.
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template <size_t N>
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void RegisterHandlers(const FunctionInfo (&functions)[N]) {
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RegisterHandlers(functions, N);
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}
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/**
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* Registers handlers in the service. Usually prefer using the other RegisterHandlers
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* overload in order to avoid needing to specify the array size.
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*/
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void RegisterHandlers(const FunctionInfo* functions, size_t n) {
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RegisterHandlersBase(functions, n);
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}
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private:
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/**
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* This function is used to allow invocation of pointers to handlers stored in the base class
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* without needing to expose the type of this derived class. Pointers-to-member may require a
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* fixup when being up or downcast, and thus code that does that needs to know the concrete type
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* of the derived class in order to invoke one of it's functions through a pointer.
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*/
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static void Invoker(ServiceFrameworkBase* object, HandlerFnP<ServiceFrameworkBase> member,
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Kernel::HLERequestContext& ctx) {
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// Cast back up to our original types and call the member function
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(static_cast<Self*>(object)->*static_cast<HandlerFnP<Self>>(member))(ctx);
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}
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};
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/// Initialize ServiceManager
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void Init();
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/// Shutdown ServiceManager
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void Shutdown();
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/// Map of named ports managed by the kernel, which can be retrieved using the ConnectToPort SVC.
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extern std::unordered_map<std::string, Kernel::SharedPtr<Kernel::ClientPort>> g_kernel_named_ports;
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/// Adds a port to the named port table
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void AddNamedPort(std::string name, Kernel::SharedPtr<Kernel::ClientPort> port);
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} // namespace Service
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