public static bool BeginIO(Stream stream, PhpStream phpStream, StreamAccessOptions access, int desc_no)
{
if (access == StreamAccessOptions.Read && !phpStream.CanWrite ||
access == StreamAccessOptions.Write && !phpStream.CanRead)
{
PhpException.Throw(PhpError.Warning, LibResources.GetString("descriptor_item_invalid_mode", desc_no));
return false;
}
ActivePipe pipe = new ActivePipe();
pipe.stream = stream;
pipe.phpStream = phpStream;
pipe.access = access;
pipe.callback = new AsyncCallback(pipe.Callback);
if (access == StreamAccessOptions.Read)
{
var buffer = new byte[BufferSize];
stream.BeginRead(buffer, 0, buffer.Length, pipe.callback, null);
pipe.buffer = new PhpBytes(buffer);
}
else
{
pipe.buffer = phpStream.ReadBytes(BufferSize);
if (pipe.buffer != null)
stream.BeginWrite(pipe.buffer.ReadonlyData, 0, pipe.buffer.Length, pipe.callback, null);
else
stream.Close();
}
return true;
}
