public virtual void RemovePendingTask(IImageLoaderTask task)
{
if (task != null)
{
lock (_lock)
{
PendingTasks.TryRemove(task);
SimilarTasks.Remove(task);
}
}
}
protected async Task RunImageLoadingTaskAsync(IImageLoaderTask pendingTask)
{
string keyRaw = pendingTask.KeyRaw;
try
{
if (_imageLoader.VerbosePerformanceLogging)
{
IPlatformPerformance performance = _imageLoader.Performance;
LogSchedulerStats(performance);
var stopwatch = Stopwatch.StartNew();
await pendingTask.RunAsync().ConfigureAwait(false);
stopwatch.Stop();
_imageLoader.Logger?.Debug(string.Format("[PERFORMANCE] RunAsync - NetManagedThreadId: {0}, NativeThreadId: {1}, Execution: {2} ms, Key: {3}",
performance.GetCurrentManagedThreadId(),
performance.GetCurrentSystemThreadId(),
stopwatch.Elapsed.Milliseconds,
pendingTask.Key));
}
else
{
await pendingTask.RunAsync().ConfigureAwait(false);
}
}
finally
{
lock (_lock)
{
RunningTasks.Remove(keyRaw);
if (SimilarTasks.Count > 0)
{
SimilarTasks.RemoveAll(v => v == null || v.IsCompleted || v.IsCancelled);
var similarItems = SimilarTasks.Where(v => v.KeyRaw == keyRaw);
foreach (var similar in similarItems)
{
SimilarTasks.Remove(similar);
LoadImage(similar);
}
}
}
pendingTask.TryDispose();
await TakeFromPendingTasksAndRunAsync().ConfigureAwait(false);
}
}
public virtual void Cancel(Func <IImageLoaderTask, bool> predicate)
{
lock (_similarTasksLock)
{
foreach (var task in PendingTasks.Where(p => predicate(p)))
{
task?.Cancel();
}
var items = SimilarTasks.Where(v => predicate(v)).ToList();
foreach (var item in items)
{
SimilarTasks.Remove(item);
}
}
}
