private void RemoveVolumeCore(CacheKey cacheKey, CachedVolume cachedItem)
{
lock (_syncRoot)
{
// double check identity of item being removed, in case it's already been recreated before the previous item's dispose finishes
CachedVolume realItem;
if (_cache.TryGetValue(cacheKey, out realItem) && ReferenceEquals(realItem, cachedItem))
{
_cache.Remove(cacheKey);
}
}
}
public void Dispose()
{
if (_cachedVolume != null)
{
if (_locked)
{
_cachedVolume.Unlock();
}
_cachedVolume._progressChanged.RemoveHandler(CachedVolumeOnProgressChanged);
_cachedVolume.DecrementReferenceCount();
_cachedVolume = null;
}
}
private ICachedVolumeReference CreateVolumeCore(IList <Frame> frames)
{
var cacheKey = new CacheKey(frames);
lock (_syncRoot)
{
CachedVolume cachedItem;
if (!_cache.TryGetValue(cacheKey, out cachedItem) || cachedItem.IsDisposed)
{
_cache[cacheKey] = cachedItem = new CachedVolume(this, cacheKey, frames);
}
return(cachedItem.CreateReference()); // always return a new counted reference to the cache item
}
}
private void RemoveVolumeCore(CacheKey cacheKey, CachedVolume cachedItem)
{
lock (_syncRoot)
{
// cached volume is an orphan because viewer was closed, so just ignore this command
if (_cache == null)
{
return;
}
// double check identity of item being removed, in case it's already been recreated before the previous item's dispose finishes
CachedVolume realItem;
if (_cache.TryGetValue(cacheKey, out realItem) && ReferenceEquals(realItem, cachedItem))
{
_cache.Remove(cacheKey);
}
}
}
public CachedVolumeReference(CachedVolume cachedVolume)
{
cachedVolume.IncrementReferenceCount();
_cachedVolume = cachedVolume;
_cachedVolume._progressChanged.AddHandler(CachedVolumeOnProgressChanged);
}
public CachedVolumeReference(CachedVolume cachedVolume)
{
cachedVolume.IncrementReferenceCount();
_cachedVolume = cachedVolume;
_cachedVolume._progressChanged += CachedVolumeOnProgressChanged;
}