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

1 files changed, 62 insertions, 0 deletions

diff --git a/Ryujinx.HLE/HOS/SystemState/AppletStateMgr.cs b/Ryujinx.HLE/HOS/SystemState/AppletStateMgr.cs
new file mode 100644
index 00000000..ee0e6fea
--- /dev/null
+++ b/Ryujinx.HLE/HOS/SystemState/AppletStateMgr.cs
@@ -0,0 +1,62 @@
+using Ryujinx.HLE.HOS.Kernel;
+using Ryujinx.HLE.HOS.Services.Am;
+using System;
+using System.Collections.Concurrent;
+
+namespace Ryujinx.HLE.HOS.SystemState
+{
+    class AppletStateMgr : IDisposable
+    {
+        private ConcurrentQueue<MessageInfo> Messages;
+
+        public FocusState FocusState { get; private set; }
+
+        public KEvent MessageEvent { get; private set; }
+
+        public AppletStateMgr()
+        {
+            Messages = new ConcurrentQueue<MessageInfo>();
+
+            MessageEvent = new KEvent();
+        }
+
+        public void SetFocus(bool IsFocused)
+        {
+            FocusState = IsFocused
+                ? FocusState.InFocus
+                : FocusState.OutOfFocus;
+
+            EnqueueMessage(MessageInfo.FocusStateChanged);
+        }
+
+        public void EnqueueMessage(MessageInfo Message)
+        {
+            Messages.Enqueue(Message);
+
+            MessageEvent.WaitEvent.Set();
+        }
+
+        public bool TryDequeueMessage(out MessageInfo Message)
+        {
+            if (Messages.Count < 2)
+            {
+                MessageEvent.WaitEvent.Reset();
+            }
+
+            return Messages.TryDequeue(out Message);
+        }
+
+        public void Dispose()
+        {
+            Dispose(true);
+        }
+
+        protected virtual void Dispose(bool Disposing)
+        {
+            if (Disposing)
+            {
+                MessageEvent.Dispose();
+            }
+        }
+    }
+}
\ No newline at end of file