249 lines
9.4 KiB
C++
249 lines
9.4 KiB
C++
// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include <cstddef>
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#include <mutex>
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#include <string>
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#include <boost/container/flat_map.hpp>
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#include "common/common_types.h"
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#include "core/hle/kernel/hle_ipc.h"
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// Namespace Service
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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 HLERequestContext;
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class KClientPort;
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class KServerSession;
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class ServiceThread;
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} // namespace Kernel
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namespace Service {
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namespace FileSystem {
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class FileSystemController;
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}
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namespace NVFlinger {
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class HosBinderDriverServer;
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class NVFlinger;
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} // namespace NVFlinger
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namespace SM {
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class ServiceManager;
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}
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/// Default number of maximum connections to a server session.
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static constexpr u32 ServerSessionCountMax = 0x40;
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static_assert(ServerSessionCountMax == 0x40,
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"ServerSessionCountMax isn't 0x40 somehow, this assert is a reminder that this will "
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"break lots of things");
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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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/// Invokes a service request routine using the HIPC protocol.
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void InvokeRequest(Kernel::HLERequestContext& ctx);
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/// Invokes a service request routine using the HIPC protocol.
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void InvokeRequestTipc(Kernel::HLERequestContext& ctx);
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/// Creates a port pair and registers it on the kernel's global port registry.
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Kernel::KClientPort& CreatePort();
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/// Handles a synchronization request for the service.
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Result HandleSyncRequest(Kernel::KServerSession& session,
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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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/// Used to gain exclusive access to the service members, e.g. from CoreTiming thread.
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[[nodiscard]] std::scoped_lock<std::mutex> LockService() {
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return std::scoped_lock{lock_service};
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}
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/// System context that the service operates under.
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Core::System& system;
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/// Identifier string used to connect to the service.
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std::string service_name;
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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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explicit ServiceFrameworkBase(Core::System& system_, const char* service_name_,
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ServiceThreadType thread_type, u32 max_sessions_,
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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 RegisterHandlersBaseTipc(const FunctionInfoBase* functions, std::size_t n);
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void ReportUnimplementedFunction(Kernel::HLERequestContext& ctx, const FunctionInfoBase* info);
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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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/// Flag to store if a port was already create/installed to detect multiple install attempts,
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/// which is not supported.
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bool service_registered = false;
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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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boost::container::flat_map<u32, FunctionInfoBase> handlers_tipc;
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/// Used to gain exclusive access to the service members, e.g. from CoreTiming thread.
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std::mutex lock_service;
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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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*
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* @param system_ The system context to construct this service under.
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* @param service_name_ Name of the service.
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* @param thread_type Specifies the thread type for this service. If this is set to CreateNew,
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* it creates a new thread for it, otherwise this uses the default thread.
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* @param max_sessions_ Maximum number of sessions that can be connected to this service at the
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* same time.
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*/
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explicit ServiceFramework(Core::System& system_, const char* service_name_,
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ServiceThreadType thread_type = ServiceThreadType::Default,
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u32 max_sessions_ = ServerSessionCountMax)
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: ServiceFrameworkBase(system_, service_name_, thread_type, 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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/// Registers handlers in the service.
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template <std::size_t N>
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void RegisterHandlersTipc(const FunctionInfo (&functions)[N]) {
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RegisterHandlersTipc(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 RegisterHandlersTipc(const FunctionInfo* functions, std::size_t n) {
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RegisterHandlersBaseTipc(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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/**
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* The purpose of this class is to own any objects that need to be shared across the other service
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* implementations. Will be torn down when the global system instance is shutdown.
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*/
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class Services final {
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public:
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explicit Services(std::shared_ptr<SM::ServiceManager>& sm, Core::System& system);
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~Services();
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void KillNVNFlinger();
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private:
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std::unique_ptr<NVFlinger::HosBinderDriverServer> hos_binder_driver_server;
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std::unique_ptr<NVFlinger::NVFlinger> nv_flinger;
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};
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} // namespace Service
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