websockets: Initial websocket support.

[8sync.git] / 8sync / ports.scm

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+;;; 8sync --- Asynchronous programming for Guile
+;;; Copyright © 2017 Christopher Allan Webber <cwebber@dustycloud.org>
+;;;
+;;; This file is part of 8sync.
+;;;
+;;; 8sync is free software: you can redistribute it and/or modify it
+;;; under the terms of the GNU Lesser General Public License as
+;;; published by the Free Software Foundation, either version 3 of the
+;;; License, or (at your option) any later version.
+;;;
+;;; 8sync is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU Lesser General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU Lesser General Public
+;;; License along with 8sync.  If not, see <http://www.gnu.org/licenses/>.
+
+
+(define-module (8sync ports)
+  #:export (set-port-nonblocking!))
+
+(define (set-port-nonblocking! port)
+  "Do the usual song and dance to make this port nonblocking."
+  (let ((flags (fcntl port F_GETFL)))
+    (fcntl port F_SETFL (logior O_NONBLOCK flags))))