ntc: Implement IEnsureNetworkClockAvailabilityService (#3192)

* ntc: Implement IEnsureNetworkClockAvailabilityService

This PR implement a basic `IEnsureNetworkClockAvailabilityService` checked by RE. It's needed by Splatoon 2 with Guest Internet Access enabled. Game is now playable with this setting.

* Update Ryujinx.HLE/HOS/Services/Nim/Ntc/StaticService/IEnsureNetworkClockAvailabilityService.cs

Co-authored-by: gdkchan <gab.dark.100@gmail.com>

Co-authored-by: gdkchan <gab.dark.100@gmail.com>

1 files changed, 77 insertions, 0 deletions

diff --git a/Ryujinx.HLE/HOS/Services/Nim/Ntc/StaticService/IEnsureNetworkClockAvailabilityService.cs b/Ryujinx.HLE/HOS/Services/Nim/Ntc/StaticService/IEnsureNetworkClockAvailabilityService.cs
new file mode 100644
index 00000000..fb31bd1f
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Services/Nim/Ntc/StaticService/IEnsureNetworkClockAvailabilityService.cs
@@ -0,0 +1,77 @@
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.HOS.Ipc;
+using Ryujinx.HLE.HOS.Kernel.Common;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Nim.Ntc.StaticService
+{
+    class IEnsureNetworkClockAvailabilityService : IpcService 
+    {
+        private KEvent     _finishNotificationEvent;
+        private ResultCode _taskResultCode;
+
+        public IEnsureNetworkClockAvailabilityService(ServiceCtx context)
+        {
+            _finishNotificationEvent = new KEvent(context.Device.System.KernelContext);
+            _taskResultCode          = ResultCode.Success;
+
+            // NOTE: The service starts a thread that polls Nintendo NTP server and syncs the time with it.
+            //       Additionnally it gets and uses some settings too:
+            //       autonomic_correction_interval_seconds, autonomic_correction_failed_retry_interval_seconds,
+            //       autonomic_correction_immediate_try_count_max, autonomic_correction_immediate_try_interval_milliseconds
+        }
+
+        [CommandHipc(0)]
+        // StartTask()
+        public ResultCode StartTask(ServiceCtx context)
+        {
+            if (!context.Device.Configuration.EnableInternetAccess)
+            {
+                return (ResultCode)Time.ResultCode.NetworkTimeNotAvailable;
+            }
+
+            // NOTE: Since we don't support the Nintendo NTP server, we can signal the event now to confirm the update task is done.
+            _finishNotificationEvent.ReadableEvent.Signal();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceNtc);
+
+            return ResultCode.Success;
+        }
+
+        [CommandHipc(1)]
+        // GetFinishNotificationEvent() -> handle<copy>
+        public ResultCode GetFinishNotificationEvent(ServiceCtx context)
+        {
+            if (context.Process.HandleTable.GenerateHandle(_finishNotificationEvent.ReadableEvent, out int finishNotificationEventHandle) != KernelResult.Success)
+            {
+                throw new InvalidOperationException("Out of handles!");
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(finishNotificationEventHandle);
+
+            return ResultCode.Success;
+        }
+
+        [CommandHipc(2)]
+        // GetResult()
+        public ResultCode GetResult(ServiceCtx context)
+        {
+            return _taskResultCode;
+        }
+
+        [CommandHipc(3)]
+        // Cancel()
+        public ResultCode Cancel(ServiceCtx context)
+        {
+            // NOTE: The update task should be canceled here.
+            _finishNotificationEvent.ReadableEvent.Signal();
+
+            _taskResultCode = (ResultCode)Time.ResultCode.NetworkTimeTaskCanceled;
+
+            Logger.Stub?.PrintStub(LogClass.ServiceNtc);
+
+            return ResultCode.Success;
+        }
+    }
+}
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