private static ValueTask <int> WritePacketAsync(IByteHandler byteHandler, int sequenceNumber, ArraySegment <byte> contents, IOBehavior ioBehavior)
{
var bufferLength = contents.Count + 4;
var buffer = ArrayPool <byte> .Shared.Rent(bufferLength);
SerializationUtility.WriteUInt32((uint)contents.Count, buffer, 0, 3);
buffer[3] = (byte)sequenceNumber;
Buffer.BlockCopy(contents.Array, contents.Offset, buffer, 4, contents.Count);
var task = byteHandler.WriteBytesAsync(new ArraySegment <byte>(buffer, 0, bufferLength), ioBehavior);
if (task.IsCompletedSuccessfully)
{
ArrayPool <byte> .Shared.Return(buffer);
return(default(ValueTask <int>));
}
return(AddContinuation(task, buffer));
// NOTE: use a local function (with no captures) to defer creation of lambda objects
ValueTask <int> AddContinuation(ValueTask <int> task_, byte[] buffer_)
{
return(task_.ContinueWith(x =>
{
ArrayPool <byte> .Shared.Return(buffer_);
return default(ValueTask <int>);
}));
}
}
private static ValueTask <int> WritePacketAsync(IByteHandler byteHandler, int sequenceNumber, ArraySegment <byte> contents, IOBehavior ioBehavior)
{
var bufferLength = contents.Count + 4;
var buffer = ArrayPool <byte> .Shared.Rent(bufferLength);
SerializationUtility.WriteUInt32((uint)contents.Count, buffer, 0, 3);
buffer[3] = (byte)sequenceNumber;
Buffer.BlockCopy(contents.Array, contents.Offset, buffer, 4, contents.Count);
var task = byteHandler.WriteBytesAsync(new ArraySegment <byte>(buffer, 0, bufferLength), ioBehavior);
if (task.IsCompletedSuccessfully)
{
ArrayPool <byte> .Shared.Return(buffer);
return(default);