Code style fixes and nits on the HLE project (#355)

* Some style fixes and nits on ITimeZoneService

* Remove some unneeded usings

* Remove the Ryujinx.HLE.OsHle.Handles namespace

* Remove hbmenu automatic load on process exit

* Rename Ns to Device, rename Os to System, rename SystemState to State

* Move Exceptions and Utilities out of OsHle

* Rename OsHle to HOS

* Rename OsHle folder to HOS

* IManagerDisplayService and ISystemDisplayService style fixes

* BsdError shouldn't be public

* Add a empty new line before using static

* Remove unused file

* Some style fixes on NPDM

* Exit gracefully when the application is closed

* Code style fixes on IGeneralService

* Add 0x prefix on values printed as hex

* Small improvements on finalization code

* Move ProcessId and ThreadId out of AThreadState

* Rename VFs to FileSystem

* FsAccessHeader shouldn't be public. Also fix file names casing

* More case changes on NPDM

* Remove unused files

* Move using to the correct place on NPDM

* Use properties on KernelAccessControlMmio

* Address PR feedback

4 files changed, 156 insertions, 0 deletions

diff --git a/Ryujinx.HLE/HOS/Services/Nfp/DeviceState.cs b/Ryujinx.HLE/HOS/Services/Nfp/DeviceState.cs
new file mode 100644
index 00000000..04527893
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Services/Nfp/DeviceState.cs
@@ -0,0 +1,7 @@
+namespace Ryujinx.HLE.HOS.Services.Nfp
+{
+    enum DeviceState
+    {
+        Initialized = 0
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Services/Nfp/IUser.cs b/Ryujinx.HLE/HOS/Services/Nfp/IUser.cs
new file mode 100644
index 00000000..eac90da4
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Services/Nfp/IUser.cs
@@ -0,0 +1,114 @@
+using Ryujinx.HLE.HOS.Ipc;
+using Ryujinx.HLE.HOS.Kernel;
+using Ryujinx.HLE.Input;
+using Ryujinx.HLE.Logging;
+using System.Collections.Generic;
+
+namespace Ryujinx.HLE.HOS.Services.Nfp
+{
+    class IUser : IpcService
+    {
+        private Dictionary<int, ServiceProcessRequest> m_Commands;
+
+        public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => m_Commands;
+
+        private const HidControllerId NpadId = HidControllerId.CONTROLLER_PLAYER_1;
+
+        private State State = State.NonInitialized;
+
+        private DeviceState DeviceState = DeviceState.Initialized;
+
+        private KEvent ActivateEvent;
+
+        private KEvent DeactivateEvent;
+
+        private KEvent AvailabilityChangeEvent;
+
+        public IUser()
+        {
+            m_Commands = new Dictionary<int, ServiceProcessRequest>()
+            {
+                { 0,  Initialize                    },
+                { 17, AttachActivateEvent           },
+                { 18, AttachDeactivateEvent         },
+                { 19, GetState                      },
+                { 20, GetDeviceState                },
+                { 21, GetNpadId                     },
+                { 23, AttachAvailabilityChangeEvent }
+            };
+
+            ActivateEvent           = new KEvent();
+            DeactivateEvent         = new KEvent();
+            AvailabilityChangeEvent = new KEvent();
+        }
+
+        public long Initialize(ServiceCtx Context)
+        {
+            Context.Device.Log.PrintStub(LogClass.ServiceNfp, "Stubbed.");
+
+            State = State.Initialized;
+
+            return 0;
+        }
+
+        public long AttachActivateEvent(ServiceCtx Context)
+        {
+            Context.Device.Log.PrintStub(LogClass.ServiceNfp, "Stubbed.");
+
+            int Handle = Context.Process.HandleTable.OpenHandle(ActivateEvent);
+
+            Context.Response.HandleDesc = IpcHandleDesc.MakeCopy(Handle);;
+
+            return 0;
+        }
+
+        public long AttachDeactivateEvent(ServiceCtx Context)
+        {
+            Context.Device.Log.PrintStub(LogClass.ServiceNfp, "Stubbed.");
+
+            int Handle = Context.Process.HandleTable.OpenHandle(DeactivateEvent);
+
+            Context.Response.HandleDesc = IpcHandleDesc.MakeCopy(Handle);
+
+            return 0;
+        }
+
+        public long GetState(ServiceCtx Context)
+        {
+            Context.ResponseData.Write((int)State);
+
+            Context.Device.Log.PrintStub(LogClass.ServiceNfp, "Stubbed.");
+
+            return 0;
+        }
+
+        public long GetDeviceState(ServiceCtx Context)
+        {
+            Context.ResponseData.Write((int)DeviceState);
+
+            Context.Device.Log.PrintStub(LogClass.ServiceNfp, "Stubbed.");
+
+            return 0;
+        }
+
+        public long GetNpadId(ServiceCtx Context)
+        {
+            Context.ResponseData.Write((int)NpadId);
+
+            Context.Device.Log.PrintStub(LogClass.ServiceNfp, "Stubbed.");
+
+            return 0;
+        }
+
+        public long AttachAvailabilityChangeEvent(ServiceCtx Context)
+        {
+            Context.Device.Log.PrintStub(LogClass.ServiceNfp, "Stubbed.");
+
+            int Handle = Context.Process.HandleTable.OpenHandle(AvailabilityChangeEvent);
+
+            Context.Response.HandleDesc = IpcHandleDesc.MakeCopy(Handle);
+
+            return 0;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Services/Nfp/IUserManager.cs b/Ryujinx.HLE/HOS/Services/Nfp/IUserManager.cs
new file mode 100644
index 00000000..770f0341
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Services/Nfp/IUserManager.cs
@@ -0,0 +1,27 @@
+using Ryujinx.HLE.HOS.Ipc;
+using System.Collections.Generic;
+
+namespace Ryujinx.HLE.HOS.Services.Nfp
+{
+    class IUserManager : IpcService
+    {
+        private Dictionary<int, ServiceProcessRequest> m_Commands;
+
+        public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => m_Commands;
+
+        public IUserManager()
+        {
+            m_Commands = new Dictionary<int, ServiceProcessRequest>()
+            {
+                { 0, GetUserInterface }
+            };
+        }
+
+        public long GetUserInterface(ServiceCtx Context)
+        {
+            MakeObject(Context, new IUser());
+
+            return 0;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Services/Nfp/State.cs b/Ryujinx.HLE/HOS/Services/Nfp/State.cs
new file mode 100644
index 00000000..0b4b3c1b
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Services/Nfp/State.cs
@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Nfp
+{
+    enum State
+    {
+        NonInitialized = 0,
+        Initialized = 1
+    }
+}
\ No newline at end of file