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avoid duplicate removing

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弘韬 张 2021-05-23 22:54:52 +08:00
parent e8691c210d
commit 37f1a64495
1 changed files with 6 additions and 2 deletions
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8
Flow.Launcher.Infrastructure/Image/ImageCache.cs
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@ -26,7 +26,7 @@ namespace Flow.Launcher.Infrastructure.Image
private const int MaxCached = 50;
public ConcurrentDictionary<string, ImageUsage> Data { get; private set; } = new ConcurrentDictionary<string, ImageUsage>();
private const int permissibleFactor = 2;
public void Initialization(Dictionary<string, int> usage)
{
foreach (var key in usage.Keys)
@ -35,6 +35,8 @@ namespace Flow.Launcher.Infrastructure.Image
}
}
private volatile bool removing;
public ImageSource this[string path]
{
get
@ -62,11 +64,13 @@ namespace Flow.Launcher.Infrastructure.Image
// To prevent the dictionary from drastically increasing in size by caching images, the dictionary size is not allowed to grow more than the permissibleFactor * maxCached size
// This is done so that we don't constantly perform this resizing operation and also maintain the image cache size at the same time
if (Data.Count > permissibleFactor * MaxCached)
if (Data.Count > permissibleFactor * MaxCached && !removing)
{
removing = true;
// To delete the images from the data dictionary based on the resizing of the Usage Dictionary.
foreach (var key in Data.OrderBy(x => x.Value.usage).Take(Data.Count - MaxCached).Select(x => x.Key))
Data.TryRemove(key, out _);
removing = false;
}
}
}