Fix divide by zero exception occasionally occurring when exiting

Ruben2776 · May 17, 2023 · 5eb724c · 5eb724c
1 parent 9f00b97
commit 5eb724c
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/PicView/ChangeImage/Preloader.cs b/PicView/ChangeImage/Preloader.cs
@@ -194,18 +194,21 @@ internal static void Remove(int key)
 
             Parallel.For(0, PositiveIterations, i =>
             {
+                if (Pics.Count is 0) return; // Fix divide by zero exception occasionally occurring when exiting
                 var index = (nextStartingIndex + i) % Pics.Count;
                 _ = AddAsync(index).ConfigureAwait(false);
             });
             Parallel.For(0, NegativeIterations, i =>
             {
+                if (Pics.Count is 0) return; // Fix divide by zero exception occasionally occurring when exiting
                 var index = (prevStartingIndex - i + Pics.Count) % Pics.Count;
                 _ = AddAsync(index).ConfigureAwait(false);
             });
             if (Pics.Count > MaxCount + NegativeIterations)
             {
                 for (var i = 0; i < NegativeIterations; i++)
                 {
+                    if (Pics.Count is 0) return; // Fix divide by zero exception occasionally occurring when exiting
                     var index = (deleteIndex - i + Pics.Count) % Pics.Count;
                     Remove(index);
                 }
@@ -219,18 +222,21 @@ internal static void Remove(int key)
 
             Parallel.For(0, PositiveIterations, i =>
             {
+                if (Pics.Count is 0) return; // Fix divide by zero exception occasionally occurring when exiting
                 var index = (nextStartingIndex - i + Pics.Count) % Pics.Count;
                 _ = AddAsync(index).ConfigureAwait(false);
             });
             Parallel.For(0, NegativeIterations, i =>
             {
+                if (Pics.Count is 0) return; // Fix divide by zero exception occasionally occurring when exiting
                 var index = (prevStartingIndex + i) % Pics.Count;
                 _ = AddAsync(index).ConfigureAwait(false);
             });
             if (Pics.Count > MaxCount + NegativeIterations)
             {
                 for (var i = 0; i < NegativeIterations; i++)
                 {
+                    if (Pics.Count is 0) return; // Fix divide by zero exception occasionally occurring when exiting
                     var index = (deleteIndex + i) % Pics.Count;
                     Remove(index);
                 }