old data

StgSharp.Common/Logic/Timing/TimeSourceProvider.cs

@@ -0,0 +1,89 @@
+//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
+//     file="TimeSourceProvider.cs"
+//     Project: StgSharp
+//     AuthorGroup: Nitload Space
+//     Copyright (c) Nitload Space. All rights reserved.
+//     
+//     Permission is hereby granted, free of charge, to any person 
+//     obtaining a copy of this software and associated documentation 
+//     files (the “Software”), to deal in the Software without restriction, 
+//     including without limitation the rights to use, copy, modify, merge,
+//     publish, distribute, sublicense, and/or sell copies of the Software, 
+//     and to permit persons to whom the Software is furnished to do so, 
+//     subject to the following conditions:
+//     
+//     The above copyright notice and 
+//     this permission notice shall be included in all copies 
+//     or substantial portions of the Software.
+//     
+//     THE SOFTWARE IS PROVIDED “AS IS”, 
+//     WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
+//     INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+//     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
+//     IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+//     DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+//     ARISING FROM, OUT OF OR IN CONNECTION WITH 
+//     THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//     
+//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
+using StgSharp;
+
+using System;
+using System.Linq;
+using System.Threading;
+
+namespace StgSharp.Timing
+{
+    public abstract class TimeSourceProviderBase
+    {
+
+        private SemaphoreSlim _addSubscriberSemaphore = new SemaphoreSlim(
+            1, 1 );
+
+        protected SemaphoreSlim CheckSubscriberSemaphore
+        {
+            get => _addSubscriberSemaphore;
+        }
+
+        public void AddSubscriber( TimeSpanProvider subscriber )
+        {
+            try {
+                _addSubscriberSemaphore.Wait();
+                AddSubscriberUnsynced( subscriber );
+            }
+            catch( Exception ) {
+                throw;
+            }
+            finally {
+                _addSubscriberSemaphore.Release();
+            }
+        }
+
+        public void RemoveSubscriber( TimeSpanProvider subscriber )
+        {
+            _addSubscriberSemaphore.Wait();
+            try {
+                RemoveSubscriberUnsynced( subscriber );
+            }
+            catch( Exception ) {
+                throw;
+            }
+            finally {
+                _addSubscriberSemaphore.Release();
+            }
+        }
+
+        public abstract void StartProvidingTime();
+
+        public abstract void StopProvidingTime();
+
+        protected abstract void AddSubscriberUnsynced(
+            TimeSpanProvider subscriber );
+
+        protected abstract void RemoveSubscriberUnsynced(
+            TimeSpanProvider subscriber );
+
+    }
+}