Implement time:* 4.0.0 commands (#736)

* Abstract SteadyClockCore to follow Nintendo changes in 4.x

This is the ground work for 4.0.0 support

* Implement TickBasedSteadyClockCore

Preparation for the ephemeral clock.

* Refactor SystemClockCore to follow 4.0.0 changes

* Implement EphemeralNetworkSystemClock

* Implement GetSnapshotClock & GetSnapshotClockFromSystemClockContext

* Implement CalculateStandardUserSystemClockDifferenceByUser & CalculateSpanBetween

* Remove an outdated comment & unused import

* Fix a nit and GetClockSnapshot

* Address comment

1 files changed, 5 insertions, 10 deletions

diff --git a/Ryujinx.HLE/HOS/Services/Time/Clock/StandardUserSystemClockCore.cs b/Ryujinx.HLE/HOS/Services/Time/Clock/StandardUserSystemClockCore.cs
index 00f296ad..c98b0064 100644
--- a/Ryujinx.HLE/HOS/Services/Time/Clock/StandardUserSystemClockCore.cs
+++ b/Ryujinx.HLE/HOS/Services/Time/Clock/StandardUserSystemClockCore.cs
@@ -8,22 +8,22 @@ namespace Ryujinx.HLE.HOS.Services.Time.Clock
         private StandardNetworkSystemClockCore _networkSystemClockCore;
         private bool                           _autoCorrectionEnabled;
 
-        private static StandardUserSystemClockCore instance;
+        private static StandardUserSystemClockCore _instance;
 
         public static StandardUserSystemClockCore Instance
         {
             get
             {
-                if (instance == null)
+                if (_instance == null)
                 {
-                    instance = new StandardUserSystemClockCore(StandardLocalSystemClockCore.Instance, StandardNetworkSystemClockCore.Instance);
+                    _instance = new StandardUserSystemClockCore(StandardLocalSystemClockCore.Instance, StandardNetworkSystemClockCore.Instance);
                 }
 
-                return instance;
+                return _instance;
             }
         }
 
-        public StandardUserSystemClockCore(StandardLocalSystemClockCore localSystemClockCore, StandardNetworkSystemClockCore networkSystemClockCore)
+        public StandardUserSystemClockCore(StandardLocalSystemClockCore localSystemClockCore, StandardNetworkSystemClockCore networkSystemClockCore) : base(localSystemClockCore.GetSteadyClockCore())
         {
             _localSystemClockCore   = localSystemClockCore;
             _networkSystemClockCore = networkSystemClockCore;
@@ -35,11 +35,6 @@ namespace Ryujinx.HLE.HOS.Services.Time.Clock
             return ResultCode.NotImplemented;
         }
 
-        public override SteadyClockCore GetSteadyClockCore()
-        {
-            return _localSystemClockCore.GetSteadyClockCore();
-        }
-
         public override ResultCode GetSystemClockContext(KThread thread, out SystemClockContext context)
         {
             ResultCode result = ApplyAutomaticCorrection(thread, false);