core: hle: server_session: Use separate threads for each service connection.

src/core/hle/kernel/service_thread.h

@@ -0,0 +1,27 @@
+// Copyright 2020 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+
+namespace Kernel {
+
+class HLERequestContext;
+class KernelCore;
+class ServerSession;
+
+class ServiceThread final {
+public:
+    explicit ServiceThread(KernelCore& kernel);
+    ~ServiceThread();
+
+    void QueueSyncRequest(ServerSession& session, std::shared_ptr<HLERequestContext>&& context);
+
+private:
+    class Impl;
+    std::unique_ptr<Impl> impl;
+};
+
+} // namespace Kernel