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102 lines
3.9 KiB
C++
102 lines
3.9 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 <memory>
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#include <string>
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#include "common/assert.h"
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#include "common/common_types.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/session.h"
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#include "core/hle/kernel/thread.h"
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#include "core/hle/result.h"
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#include "core/hle/service/service.h"
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#include "core/memory.h"
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namespace Kernel {
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class ClientSession;
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class ClientPort;
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class ServerSession;
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/**
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* Kernel object representing the server endpoint of an IPC session. Sessions are the basic CTR-OS
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* primitive for communication between different processes, and are used to implement service calls
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* to the various system services.
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*
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* To make a service call, the client must write the command header and parameters to the buffer
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* located at offset 0x80 of the TLS (Thread-Local Storage) area, then execute a SendSyncRequest
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* SVC call with its ClientSession handle. The kernel will read the command header, using it to
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* marshall the parameters to the process at the server endpoint of the session.
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* After the server replies to the request, the response is marshalled back to the caller's
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* TLS buffer and control is transferred back to it.
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*/
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class ServerSession final : public WaitObject {
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public:
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std::string GetTypeName() const override {
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return "ServerSession";
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}
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static const HandleType HANDLE_TYPE = HandleType::ServerSession;
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HandleType GetHandleType() const override {
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return HANDLE_TYPE;
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}
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using SessionPair = std::tuple<SharedPtr<ServerSession>, SharedPtr<ClientSession>>;
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/**
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* Creates a pair of ServerSession and an associated ClientSession.
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* @param name Optional name of the ports.
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* @param hle_handler Optional HLE handler for this server session.
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* @param client_port Optional The ClientPort that spawned this session.
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* @return The created session tuple
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*/
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static SessionPair CreateSessionPair(
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const std::string& name = "Unknown",
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std::shared_ptr<Service::SessionRequestHandler> hle_handler = nullptr,
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SharedPtr<ClientPort> client_port = nullptr);
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/**
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* Handle a sync request from the emulated application.
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* @returns ResultCode from the operation.
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*/
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ResultCode HandleSyncRequest();
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bool ShouldWait(Thread* thread) const override;
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void Acquire(Thread* thread) override;
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std::string name; ///< The name of this session (optional)
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bool signaled; ///< Whether there's new data available to this ServerSession
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std::shared_ptr<Session> parent; ///< The parent session, which links to the client endpoint.
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std::shared_ptr<Service::SessionRequestHandler>
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hle_handler; ///< This session's HLE request handler (optional)
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private:
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ServerSession();
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~ServerSession() override;
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/**
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* Creates a server session. The server session can have an optional HLE handler,
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* which will be invoked to handle the IPC requests that this session receives.
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* @param name Optional name of the server session.
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* @param hle_handler Optional HLE handler for this server session.
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* @return The created server session
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*/
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static ResultVal<SharedPtr<ServerSession>> Create(
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std::string name = "Unknown",
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std::shared_ptr<Service::SessionRequestHandler> hle_handler = nullptr);
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};
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/**
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* Performs command buffer translation for an HLE IPC request.
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* The command buffer from the ServerSession thread's TLS is copied into a
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* buffer and all descriptors in the buffer are processed.
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* TODO(Subv): Implement this function, currently we do not support multiple processes running at
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* once, but once that is implemented we'll need to properly translate all descriptors
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* in the command buffer.
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*/
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ResultCode TranslateHLERequest(ServerSession* server_session);
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}
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