/// <summary>
/// Adds new message to the queue. This method is thread-safe.
/// </summary>
/// <param name="writingDelegate">Custom delegate to write using message's stream.</param>
/// <param name="length">
/// Specifies how much memory will be allocated for new message.
/// Delegate will receive a stream with capacity limited by this parameter, but it is not forced to use all allocated space.
/// </param>
/// <param name="timeout">Operation timeout.</param>
/// <returns>
/// ChannelStateOperationResult with ChannelState and OperationStatus.Completed, OperationStatus.Timeout, OperationStatus.Cancelled,
/// OperationStatus.DelegateFailed, OperationStatus.RequestedLengthIsGreaterThanLogicalAddressSpace,
/// OperationStatus.RequestedLengthIsGreaterThanVirtualAddressSpace or OperationStatus.OutOfSpace
/// </returns>
public IAsyncOperation <ChannelStateOperationResult> WriteAsync(AsynchronousWritingDelegate writingDelegate, long length, TimeSpan timeout)
{
return(AsyncInfo.Run(async cancellationToken =>
{
return new ChannelStateOperationResult(await _internal.WriteAsync(DelegateHelper.Wrap(writingDelegate), null, length, cancellationToken, timeout));
}));
}
public static Func <MemoryMappedViewStream, object, CancellationToken, Task <Internal.OperationStatus> > Wrap(AsynchronousWritingDelegate externalDelegate)
{
return(async(MemoryMappedViewStream stream, object parameter, CancellationToken cancellationToken) =>
{
if (externalDelegate != null)
{
await externalDelegate.Invoke(stream.AsRandomAccessStream()).AsTask(cancellationToken);
}
return Internal.OperationStatus.Completed;
});
}