mirror of https://github.com/yuzu-mirror/yuzu
Kernel/IPC: Use Ports and Sessions as the fundamental building block of Inter Process Communication.
All handles obtained via srv::GetServiceHandle or svcConnectToPort are references to ClientSessions. Service modules will wait on the counterpart of those ClientSessions (Called ServerSessions) using svcReplyAndReceive or svcWaitSynchronization[1|N], and will be awoken when a SyncRequest is performed. HLE Interfaces are now ClientPorts which override the HandleSyncRequest virtual member function to perform command handling immediately.pull/8/head
Subv
9 years ago
parent
68c00ee771
commit
073653e858
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// Copyright 2016 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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#include "common/assert.h"
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#include "core/hle/kernel/client_port.h"
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#include "core/hle/kernel/client_session.h"
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#include "core/hle/kernel/server_session.h"
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#include "core/hle/kernel/kernel.h"
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namespace Kernel {
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ClientSession::ClientSession() {}
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ClientSession::~ClientSession() {}
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ResultVal<SharedPtr<ClientSession>> ClientSession::Create(SharedPtr<ServerSession> server_session, SharedPtr<ClientPort> client_port, std::string name) {
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SharedPtr<ClientSession> client_session(new ClientSession);
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client_session->name = std::move(name);
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client_session->server_session = server_session;
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client_session->client_port = client_port;
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return MakeResult<SharedPtr<ClientSession>>(std::move(client_session));
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}
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ResultCode ClientSession::HandleSyncRequest() {
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// Signal the server session that new data is available
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ResultCode result = server_session->HandleSyncRequest();
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if (result.IsError())
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return result;
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// Tell the client port to handle the request in case it's an HLE service.
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// The client port can be nullptr for port-less sessions (Like for example File and Directory sessions).
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if (client_port != nullptr)
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result = client_port->HandleSyncRequest();
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return result;
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}
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} // namespace
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// Copyright 2016 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 <string>
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#include "common/common_types.h"
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#include "core/hle/kernel/kernel.h"
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namespace Kernel {
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class ClientPort;
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class ServerSession;
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class ClientSession final : public Object {
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public:
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/**
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* Creates a client session.
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* @param server_session The server session associated with this client session
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* @param client_port The client port which this session is connected to
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* @param name Optional name of client session
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* @return The created client session
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*/
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static ResultVal<SharedPtr<ClientSession>> Create(SharedPtr<ServerSession> server_session, SharedPtr<ClientPort> client_port, std::string name = "Unknown");
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std::string GetTypeName() const override { return "ClientSession"; }
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std::string GetName() const override { return name; }
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static const HandleType HANDLE_TYPE = HandleType::ClientSession;
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HandleType GetHandleType() const override { return HANDLE_TYPE; }
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/**
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* Handle a SyncRequest from the emulated application.
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* @return ResultCode of the operation.
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*/
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ResultCode HandleSyncRequest();
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std::string name; ///< Name of client port (optional)
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SharedPtr<ServerSession> server_session; ///< The server session associated with this client session.
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SharedPtr<ClientPort> client_port; ///< The client port which this session is connected to.
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private:
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ClientSession();
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~ClientSession() override;
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};
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} // namespace
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// Copyright 2016 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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#include <tuple>
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#include "core/hle/kernel/client_port.h"
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#include "core/hle/kernel/client_session.h"
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#include "core/hle/kernel/server_session.h"
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#include "core/hle/kernel/thread.h"
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namespace Kernel {
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ServerSession::ServerSession() {}
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ServerSession::~ServerSession() {}
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ResultVal<SharedPtr<ServerSession>> ServerSession::Create(std::string name) {
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SharedPtr<ServerSession> server_session(new ServerSession);
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server_session->name = std::move(name);
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server_session->signaled = false;
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return MakeResult<SharedPtr<ServerSession>>(std::move(server_session));
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}
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bool ServerSession::ShouldWait() {
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return !signaled;
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}
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void ServerSession::Acquire() {
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ASSERT_MSG(!ShouldWait(), "object unavailable!");
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signaled = false;
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}
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ResultCode ServerSession::HandleSyncRequest() {
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// The ServerSession received a sync request, this means that there's new data available
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// from one of its ClientSessions, so wake up any threads that may be waiting on a svcReplyAndReceive or similar.
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signaled = true;
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WakeupAllWaitingThreads();
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return RESULT_SUCCESS;
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}
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SharedPtr<ClientSession> ServerSession::CreateClientSession() {
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// In Citra, some types of ServerSessions (File and Directory sessions) are not created as a pair of Server-Client sessions,
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// but are instead created as a single ServerSession, which then hands over a ClientSession on demand (When opening the File or Directory).
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// The real kernel (Or more specifically, the real FS service) does create the pair of Sessions at the same time (via svcCreateSession), and simply
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// stores the ClientSession until it is needed.
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return ClientSession::Create(SharedPtr<ServerSession>(this), nullptr, name + "Client").MoveFrom();
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}
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std::tuple<SharedPtr<ServerSession>, SharedPtr<ClientSession>> ServerSession::CreateSessionPair(SharedPtr<ClientPort> client_port, std::string name) {
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auto server_session = ServerSession::Create(name + "Server").MoveFrom();
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auto client_session = ClientSession::Create(server_session, client_port, name + "Client").MoveFrom();
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return std::make_tuple(server_session, client_session);
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}
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}
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