public void SetCacheWorkItem(CacheWorkItem item)
{
lock (this.sync)
{
this.cacheWorkItem = item;
this.cacheWorkWait.Set();
}
}
/// <summary>
/// Deletes all unused containers where the work item does not match <paramref name="current_work_item"/>.
/// Must be called after <see cref="ImageContainer.last_requesting_work_item"/> has been set for all elements that should remain.
/// </summary>
internal void PruneUnusedContainers(CacheWorkItem current_work_item)
{
var disposableContainers = new List <ImageContainer>();
lock (this.cache)
{
this.current_work_item = current_work_item;
foreach (ImageContainer container in this.cache.Values.ToArray())
{
if (container.last_requesting_work_item != this.current_work_item && !container.IsHandleAlive)
{
// Do not dispose here while we're in the lock - the Dispose might take a relatively long time.
disposableContainers.Add(container);
this.cache.Remove(container.Key);
}
}
}
ThreadPool.QueueUserWorkItem(this.disposeManyContainersHelperDelegate, disposableContainers);
}
