Start reading data from sockets directly into external byte arrays

Start reading data from sockets directly into external byte arrays

This adds a new read function to Dart sockets which delivers data in a
system allocated buffer. For now just use that for socket input
streams.

The IOBuffer class does not do much at the moment, but the idea of
adding it is to be able to centralize the management of the IO
buffers. One thing I am considering here is to keep a cache of free
buffers which can be reused without freeing and re-allocating.

R=ager@google.com, ajhonsen@google.com

BUG=

Committed: https://code.google.com/p/dart/source/detail?r=14321

[Mads Ager (google), 2012-10-31 07:06:22]

LGTM!

https://codereview.chromium.org/11338037/diff/1/lib/io/socket.dart
File lib/io/socket.dart (right):

https://codereview.chromium.org/11338037/diff/1/lib/io/socket.dart#newcode53
lib/io/socket.dart:53: * available for immediate reading. If no data is
available the
available the -> available

https://codereview.chromium.org/11338037/diff/1/lib/io/socket_stream_impl.dart
File lib/io/socket_stream_impl.dart (right):

https://codereview.chromium.org/11338037/diff/1/lib/io/socket_stream_impl.dar...
lib/io/socket_stream_impl.dart:12: return _socket.read(len);
Yay!

[Søren Gjesse, 2012-10-31 09:54:44]

https://codereview.chromium.org/11338037/diff/1/lib/io/socket.dart
File lib/io/socket.dart (right):

https://codereview.chromium.org/11338037/diff/1/lib/io/socket.dart#newcode53
lib/io/socket.dart:53: * available for immediate reading. If no data is
available the
On 2012/10/31 07:06:22, Mads Ager wrote:
> available the -> available

Done.