From 1facca84bab1efeaf29e26550ebbc1324a9b5f8a Mon Sep 17 00:00:00 2001
From: glax <johanna@bernloehr.eu>
Date: Fri, 21 Apr 2023 11:01:05 +0200
Subject: [PATCH] Prevent multiple processes from reading same file.

---
 Pathfinding/RegionManager.cs | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/Pathfinding/RegionManager.cs b/Pathfinding/RegionManager.cs
index 01d491e..cd572ef 100644
--- a/Pathfinding/RegionManager.cs
+++ b/Pathfinding/RegionManager.cs
@@ -39,11 +39,21 @@ namespace Pathfinding
         {
             if (!File.Exists(filePath)) 
                 return null;
-            
-            FileStream regionFile = new (filePath, FileMode.Open);
-            Region retRegion = JsonSerializer.Deserialize<Region>(regionFile, Region.serializerOptions)!;
-            regionFile.Dispose();
-            return retRegion;
+
+            while (true)
+            {
+                
+                try
+                {
+                    FileStream regionFile = new (filePath, FileMode.Open);
+                    Region retRegion = JsonSerializer.Deserialize<Region>(regionFile, Region.serializerOptions)!;
+                    regionFile.Dispose();
+                    return retRegion;
+                }catch(IOException)
+                {
+                    Thread.Sleep(10);
+                }
+            }
         }
 
         private Region? RegionFromId(ulong regionId)