private async Task <PPError> FlushAsyncCore(MessageLoop messageLoop = null)
{
var tcs = new TaskCompletionSource <PPError>();
EventHandler <PPError> handler = (s, e) => { tcs.TrySetResult(e); };
try
{
HandleFlush += handler;
if (MessageLoop == null && messageLoop == null)
{
Flush();
}
else
{
Action <PPError> action = new Action <PPError>((e) =>
{
var result = (PPError)PPBFileIO.Flush(this,
new BlockUntilComplete()
);
tcs.TrySetResult(result);
}
);
InvokeHelper(action, messageLoop);
}
return(await tcs.Task);
}
catch (Exception exc)
{
Console.WriteLine(exc.Message);
tcs.SetException(exc);
return(PPError.Aborted);
}
finally
{
HandleFlush -= handler;
}
}
/// <summary> /// Flush() flushes changes to disk. This call can be very expensive! /// </summary> /// <returns>Error code.</returns> public PPError Flush() => (PPError)PPBFileIO.Flush(this, new CompletionCallback(OnFlush));
