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* Remove an outdated comment & unused import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, 0 deletions

diff --git a/Ryujinx.HLE/HOS/Services/Time/Clock/EphemeralNetworkSystemClockCore.cs b/Ryujinx.HLE/HOS/Services/Time/Clock/EphemeralNetworkSystemClockCore.cs
new file mode 100644
index 00000000..8e9073a4
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Services/Time/Clock/EphemeralNetworkSystemClockCore.cs
@@ -0,0 +1,27 @@
+namespace Ryujinx.HLE.HOS.Services.Time.Clock
+{
+    class EphemeralNetworkSystemClockCore : SystemClockCore
+    {
+        private static EphemeralNetworkSystemClockCore _instance;
+
+        public static EphemeralNetworkSystemClockCore Instance
+        {
+            get
+            {
+                if (_instance == null)
+                {
+                    _instance = new EphemeralNetworkSystemClockCore(TickBasedSteadyClockCore.Instance);
+                }
+
+                return _instance;
+            }
+        }
+
+        public EphemeralNetworkSystemClockCore(SteadyClockCore steadyClockCore) : base(steadyClockCore) { }
+
+        public override ResultCode Flush(SystemClockContext context)
+        {
+            return ResultCode.Success;
+        }
+    }
+}