Kernel/HLE: Service::Interface no longer inherits from any Kernel object, and is now its own standalone class.

Interface is now used by aggregation in ClientPort, to forward service commands to their HLE implementation if needed.

src/core/hle/kernel/client_port.cpp

@@ -8,16 +8,39 @@
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/server_port.h"
 #include "core/hle/kernel/server_session.h"
+#include "core/hle/service/service.h"
 
 namespace Kernel {
 
 ClientPort::ClientPort() {}
 ClientPort::~ClientPort() {}
 
+Kernel::SharedPtr<ClientPort> ClientPort::CreateForHLE(u32 max_sessions, std::unique_ptr<Service::Interface> hle_interface) {
+    SharedPtr<ClientPort> client_port(new ClientPort);
+    client_port->max_sessions = max_sessions;
+    client_port->active_sessions = 0;
+    client_port->name = hle_interface->GetPortName();
+    client_port->hle_interface = std::move(hle_interface);
+
+    return client_port;
+}
+
 void ClientPort::AddWaitingSession(SharedPtr<ServerSession> server_session) {
+    // A port that has an associated HLE interface doesn't have a server port.
+    if (hle_interface != nullptr)
+        return;
+
     server_port->pending_sessions.push_back(server_session);
     // Wake the threads waiting on the ServerPort
     server_port->WakeupAllWaitingThreads();
 }
 
+ResultCode ClientPort::HandleSyncRequest() {
+    // Forward the request to the associated HLE interface if it exists
+    if (hle_interface != nullptr)
+        return hle_interface->HandleSyncRequest();
+
+    return RESULT_SUCCESS;
+}
+
 } // namespace

src/core/hle/kernel/client_port.h

@@ -5,20 +5,33 @@
 #pragma once
 
 #include <string>
+#include <memory>
 
 #include "common/common_types.h"
 
 #include "core/hle/kernel/kernel.h"
 
+namespace Service {
+class Interface;
+}
+
 namespace Kernel {
 
 class ServerPort;
 class ServerSession;
 
-class ClientPort : public Object {
+class ClientPort final : public Object {
 public:
     friend class ServerPort;
 
+    /**
+     * Creates a serverless ClientPort that represents a bridge between the HLE implementation of a service/port and the emulated application.
+     * @param max_sessions Maximum number of sessions that this port is able to handle concurrently.
+     * @param hle_interface Interface object that implements the commands of the service.
+     * @returns ClientPort for the given HLE interface.
+     */
+    static Kernel::SharedPtr<ClientPort> CreateForHLE(u32 max_sessions, std::unique_ptr<Service::Interface> hle_interface);
+
     /**
      * Adds the specified server session to the queue of pending sessions of the associated ServerPort
      * @param server_session Server session to add to the queue
@@ -27,10 +40,9 @@ public:
 
     /**
      * Handle a sync request from the emulated application.
-     * Only HLE services should override this function.
      * @returns ResultCode from the operation.
      */
-    virtual ResultCode HandleSyncRequest() { return RESULT_SUCCESS; }
+    ResultCode HandleSyncRequest();
 
     std::string GetTypeName() const override { return "ClientPort"; }
     std::string GetName() const override { return name; }
@@ -38,12 +50,13 @@ public:
     static const HandleType HANDLE_TYPE = HandleType::ClientPort;
     HandleType GetHandleType() const override { return HANDLE_TYPE; }
 
-    SharedPtr<ServerPort> server_port;          ///< ServerPort associated with this client port.
+    SharedPtr<ServerPort> server_port = nullptr;                 ///< ServerPort associated with this client port.
-    u32 max_sessions;                           ///< Maximum number of simultaneous sessions the port can have
+    u32 max_sessions;                                            ///< Maximum number of simultaneous sessions the port can have
-    u32 active_sessions;                        ///< Number of currently open sessions to this port
+    u32 active_sessions;                                         ///< Number of currently open sessions to this port
-    std::string name;                           ///< Name of client port (optional)
+    std::string name;                                            ///< Name of client port (optional)
+    std::unique_ptr<Service::Interface> hle_interface = nullptr; ///< HLE implementation of this port's request handler
 
-protected:
+private:
     ClientPort();
     ~ClientPort() override;
 };

src/core/hle/service/service.cpp

@@ -92,17 +92,13 @@ void Interface::Register(const FunctionInfo* functions, size_t n) {
 // Module interface
 
 static void AddNamedPort(Interface* interface_) {
-    interface_->name = interface_->GetPortName();
+    auto client_port = Kernel::ClientPort::CreateForHLE(interface_->GetMaxSessions(), std::unique_ptr<Interface>(interface_));
-    interface_->active_sessions = 0;
+    g_kernel_named_ports.emplace(interface_->GetPortName(), client_port);
-    interface_->max_sessions = interface_->GetMaxSessions();
-    g_kernel_named_ports.emplace(interface_->GetPortName(), interface_);
 }
 
 void AddService(Interface* interface_) {
-    interface_->name = interface_->GetPortName();
+    auto client_port = Kernel::ClientPort::CreateForHLE(interface_->GetMaxSessions(), std::unique_ptr<Interface>(interface_));
-    interface_->active_sessions = 0;
+    g_srv_services.emplace(interface_->GetPortName(), client_port);
-    interface_->max_sessions = interface_->GetMaxSessions();
-    g_srv_services.emplace(interface_->GetPortName(), interface_);
 }
 
 /// Initialize ServiceManager

src/core/hle/service/service.h

@@ -25,12 +25,9 @@ static const int kMaxPortSize = 8; ///< Maximum size of a port name (8 character
 static const u32 DefaultMaxSessions = 10; ///< Arbitrary default number of maximum connections to an HLE port
 
 /// Interface to a CTROS service
-class Interface : public Kernel::ClientPort {
+class Interface {
-    // TODO(yuriks): An "Interface" being a Kernel::Object is mostly non-sense. Interface should be
-    // just something that encapsulates a session and acts as a helper to implement service
-    // processes.
 public:
-    std::string GetName() const override { return GetPortName(); }
+    virtual ~Interface() {}
 
     /**
      * Gets the maximum allowed number of sessions that can be connected to this port at the same time.
@@ -39,8 +36,6 @@ public:
      */
     virtual u32 GetMaxSessions() const { return DefaultMaxSessions; }
 
-    void AddWaitingSession(Kernel::SharedPtr<Kernel::ServerSession> server_session) override { }
-
     typedef void (*Function)(Interface*);
 
     struct FunctionInfo {
@@ -57,10 +52,9 @@ public:
         return "[UNKNOWN SERVICE PORT]";
     }
 
-    ResultCode HandleSyncRequest() override;
+    ResultCode HandleSyncRequest();
 
 protected:
-
     /**
      * Registers the functions in the service
      */