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243 lines
11 KiB
C++
243 lines
11 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <array>
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#include <cstddef>
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#include <functional>
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#include <memory>
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#include <string>
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#include <boost/container/flat_map.hpp>
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#include <boost/serialization/assume_abstract.hpp>
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#include <boost/serialization/base_object.hpp>
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#include <boost/serialization/shared_ptr.hpp>
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#include "common/common_types.h"
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#include "common/construct.h"
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#include "core/hle/kernel/hle_ipc.h"
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#include "core/hle/kernel/object.h"
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#include "core/hle/service/sm/sm.h"
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namespace Core {
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class System;
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}
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namespace Kernel {
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class KernelSystem;
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class ClientPort;
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class ServerPort;
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class ServerSession;
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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(Kernel::KernelSystem& kernel);
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void HandleSyncRequest(Kernel::HLERequestContext& context) override;
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/// Retrieves name of a function based on the header code. For IPC Recorder.
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std::string GetFunctionName(u32 header) const;
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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, typename SessionData>
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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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// TODO: Replace all these with virtual functions!
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ServiceFrameworkBase(const char* service_name, u32 max_sessions, InvokerFn* handler_invoker);
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~ServiceFrameworkBase() override;
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void RegisterHandlersBase(const FunctionInfoBase* functions, std::size_t n);
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void ReportUnimplementedFunction(u32* cmd_buf, 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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/// 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, typename SessionData = Kernel::SessionRequestHandler::SessionDataBase>
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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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explicit 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 <std::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, std::size_t n) {
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RegisterHandlersBase(functions, n);
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}
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std::unique_ptr<SessionDataBase> MakeSessionData() override {
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return std::make_unique<SessionData>();
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}
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SessionData* GetSessionData(std::shared_ptr<Kernel::ServerSession> server_session) {
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return ServiceFrameworkBase::GetSessionData<SessionData>(server_session);
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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(Core::System& system);
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struct ServiceModuleInfo {
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std::string name;
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u64 title_id;
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std::function<void(Core::System&)> init_function;
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};
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extern const std::array<ServiceModuleInfo, 40> service_module_map;
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} // namespace Service
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#define SERVICE_SERIALIZATION(T, MFIELD, TMODULE) \
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template <class Archive> \
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void save_construct(Archive& ar, const unsigned int file_version) const { \
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ar << MFIELD; \
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} \
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\
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template <class Archive> \
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static void load_construct(Archive& ar, T* t, const unsigned int file_version) { \
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std::shared_ptr<TMODULE> MFIELD; \
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ar >> MFIELD; \
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::new (t) T(MFIELD); \
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} \
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\
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template <class Archive> \
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void serialize(Archive& ar, const unsigned int) { \
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ar& boost::serialization::base_object<Kernel::SessionRequestHandler>(*this); \
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} \
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friend class boost::serialization::access; \
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friend class ::construct_access;
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#define SERVICE_SERIALIZATION_SIMPLE \
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template <class Archive> \
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void serialize(Archive& ar, const unsigned int) { \
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ar& boost::serialization::base_object<Kernel::SessionRequestHandler>(*this); \
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} \
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friend class boost::serialization::access;
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#define SERVICE_CONSTRUCT(T) \
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namespace boost::serialization { \
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template <class Archive> \
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void load_construct_data(Archive& ar, T* t, const unsigned int); \
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}
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#define SERVICE_CONSTRUCT_IMPL(T) \
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namespace boost::serialization { \
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template <class Archive> \
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void load_construct_data(Archive& ar, T* t, const unsigned int) { \
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::new (t) T(Core::Global<Core::System>()); \
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} \
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template void load_construct_data<iarchive>(iarchive & ar, T* t, const unsigned int); \
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}
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