Synchronisation hang bugfix

Author: levitation

FileExtensions.cs

@@ -22,7 +22,8 @@ public static partial class FileExtensions
     {
         //adapted from https://github.com/dotnet/runtime/blob/5ddc873d9ea6cd4bc6a935fec3057fe89a6932aa/src/libraries/System.IO.FileSystem/src/System/IO/File.cs
 
-        internal const int DefaultBufferSize = 4096;
+        //internal const int DefaultBufferSize = 4096;
+        internal const int DefaultBufferSize = 1024 * 1024;     //roland
 
         private static Encoding s_UTF8NoBOM;
 

Program.cs

@@ -448,7 +448,10 @@ public static bool NeedsUpdate(string fullName)
             var converterSaveDate = GetConverterSaveDate(fullName);
             var fileTime = GetFileTime(fullName);
 
-            if (fileTime > converterSaveDate.AddSeconds(3))     //NB! ignore if the file changed during 3 seconds after converter save   //TODO!! config
+            if (
+                !Global.Bidirectional   //no need to debounce BIDIRECTIONAL file save events when bidirectional save is disabled
+                || fileTime > converterSaveDate.AddSeconds(3)     //NB! ignore if the file changed during 3 seconds after converter save   //TODO!! config
+            )
             {
                 var otherFullName = GetOtherFullName(fullName);
                 if (fileTime > GetFileTime(otherFullName))     //NB!

Synchronisation.cs

@@ -1,6 +1,7 @@
 #define ASYNC
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Threading;
 using System.Threading.Tasks;
 using Nito.AsyncEx;
@@ -51,6 +52,9 @@ private void ReleaseLock(string name, AsyncLockWithCount lockEntry, IDisposable
 
             lock (DictionaryAccessMutex)
             {
+                lockEntry.WaiterCount--;
+                Debug.Assert(lockEntry.WaiterCount >= 0);
+
                 if (lockEntry.WaiterCount == 0)   //NB!
                 {
                     LockQueueDictionary.Remove(name);