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* Remove an outdated comment & unused import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, 27 insertions, 3 deletions

diff --git a/Ryujinx.HLE/HOS/Services/Time/Clock/SystemClockCore.cs b/Ryujinx.HLE/HOS/Services/Time/Clock/SystemClockCore.cs
index d3a056e4..52f3c908 100644
--- a/Ryujinx.HLE/HOS/Services/Time/Clock/SystemClockCore.cs
+++ b/Ryujinx.HLE/HOS/Services/Time/Clock/SystemClockCore.cs
@@ -4,11 +4,35 @@ namespace Ryujinx.HLE.HOS.Services.Time.Clock
 {
     abstract class SystemClockCore
     {
-        public abstract SteadyClockCore GetSteadyClockCore();
+        private SteadyClockCore    _steadyClockCore;
+        private SystemClockContext _context;
 
-        public abstract ResultCode GetSystemClockContext(KThread thread, out SystemClockContext context);
+        public SystemClockCore(SteadyClockCore steadyClockCore)
+        {
+            _steadyClockCore = steadyClockCore;
+            _context         = new SystemClockContext();
+
+            _context.SteadyTimePoint.ClockSourceId = steadyClockCore.GetClockSourceId();
+        }
 
-        public abstract ResultCode SetSystemClockContext(SystemClockContext context);
+        public virtual SteadyClockCore GetSteadyClockCore()
+        {
+            return _steadyClockCore;
+        }
+
+        public virtual ResultCode GetSystemClockContext(KThread thread, out SystemClockContext context)
+        {
+            context = _context;
+
+            return ResultCode.Success;
+        }
+
+        public virtual ResultCode SetSystemClockContext(SystemClockContext context)
+        {
+            _context = context;
+
+            return ResultCode.Success;
+        }
 
         public abstract ResultCode Flush(SystemClockContext context);