From a5ff497e57bc6e8793c38bdd94ea9f1cfefd17fd Mon Sep 17 00:00:00 2001 From: Eric Wong Date: Sun, 26 Dec 2010 23:54:49 +0000 Subject: revactor: split out tee_socket and use autoload Some applications never need TeeSocket, and we don't have to worry about thread-safety with Revactor. --- lib/rainbows/revactor/tee_socket.rb | 44 +++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 lib/rainbows/revactor/tee_socket.rb (limited to 'lib/rainbows/revactor') diff --git a/lib/rainbows/revactor/tee_socket.rb b/lib/rainbows/revactor/tee_socket.rb new file mode 100644 index 0000000..71aeb88 --- /dev/null +++ b/lib/rainbows/revactor/tee_socket.rb @@ -0,0 +1,44 @@ +# -*- encoding: binary -*- +# :enddoc: +# +# Revactor Sockets do not implement readpartial, so we emulate just +# enough to avoid mucking with TeeInput internals. Fortunately +# this code is not heavily used so we can usually avoid the overhead +# of adding a userspace buffer. +class Rainbows::Revactor::TeeSocket + def initialize(socket) + # IO::Buffer is used internally by Rev which Revactor is based on + # so we'll always have it available + @socket, @rbuf = socket, IO::Buffer.new + end + + def leftover + @rbuf.read + end + + # Revactor socket reads always return an unspecified amount, + # sometimes too much + def kgio_read(length, dst = "") + return dst.replace("") if length == 0 + + # always check and return from the userspace buffer first + @rbuf.size > 0 and return dst.replace(@rbuf.read(length)) + + # read off the socket since there was nothing in rbuf + tmp = @socket.read + + # we didn't read too much, good, just return it straight back + # to avoid needlessly wasting memory bandwidth + tmp.size <= length and return dst.replace(tmp) + + # ugh, read returned too much + @rbuf << tmp[length, tmp.size] + dst.replace(tmp[0, length]) + rescue EOFError + end + + # just proxy any remaining methods TeeInput may use + def close + @socket.close + end +end -- cgit v1.2.3-24-ge0c7