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-rw-r--r--2d/repl/server.scm132
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diff --git a/2d/repl/server.scm b/2d/repl/server.scm
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-;;; Repl server
-
-;; Copyright (C) 2003, 2010, 2011 Free Software Foundation, Inc.
-
-;; This library 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.
-;;
-;; This library 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 this library; if not, write to the Free Software
-;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-;; 02110-1301 USA
-
-;;; Code:
-
-(define-module (2d repl server)
- #:use-module (2d repl repl)
- #:use-module (ice-9 threads)
- #:export (make-tcp-server-socket
- make-unix-domain-server-socket
- run-server
- spawn-server
- stop-server-and-clients!))
-
-(define *open-sockets* '())
-
-(define sockets-lock (make-mutex))
-
-(define (close-socket! s)
- (with-mutex sockets-lock
- (set! *open-sockets* (delq! s *open-sockets*)))
- ;; Close-port could block or raise an exception flushing buffered
- ;; output. Hmm.
- (close-port s))
-
-(define (add-open-socket! s)
- (with-mutex sockets-lock
- (set! *open-sockets* (cons s *open-sockets*))))
-
-(define (stop-server-and-clients!)
- (cond
- ((with-mutex sockets-lock
- (and (pair? *open-sockets*)
- (car *open-sockets*)))
- => (lambda (s)
- (close-socket! s)
- (stop-server-and-clients!)))))
-
-(define* (make-tcp-server-socket #:key
- (host #f)
- (addr (if host (inet-aton host) INADDR_LOOPBACK))
- (port 37146))
- (let ((sock (socket PF_INET SOCK_STREAM 0)))
- (setsockopt sock SOL_SOCKET SO_REUSEADDR 1)
- (bind sock AF_INET addr port)
- sock))
-
-(define* (make-unix-domain-server-socket #:key (path "/tmp/guile-socket"))
- (let ((sock (socket PF_UNIX SOCK_STREAM 0)))
- (setsockopt sock SOL_SOCKET SO_REUSEADDR 1)
- (bind sock AF_UNIX path)
- sock))
-
-(define call-with-sigint
- (if (not (provided? 'posix))
- (lambda (thunk) (thunk))
- (lambda (thunk)
- (let ((handler #f))
- (dynamic-wind
- (lambda ()
- (set! handler
- (sigaction SIGINT (lambda (sig) (throw 'interrupt)))))
- thunk
- (lambda ()
- (if handler
- ;; restore Scheme handler, SIG_IGN or SIG_DFL.
- (sigaction SIGINT (car handler) (cdr handler))
- ;; restore original C handler.
- (sigaction SIGINT #f))))))))
-
-(define* (run-server #:optional (server-socket (make-tcp-server-socket)))
- (define (accept-new-client)
- (catch #t
- (lambda () (call-with-sigint (lambda () (accept server-socket))))
- (lambda (k . args)
- (cond
- ((port-closed? server-socket)
- ;; Shutting down.
- #f)
- ((eq? k 'interrupt)
- ;; Interrupt.
- (close-socket! server-socket)
- #f)
- (else
- (warn "Error accepting client" k args)
- ;; Retry after a timeout.
- (sleep 1)
- (accept-new-client))))))
-
- (sigaction SIGPIPE SIG_IGN)
- (add-open-socket! server-socket)
- (listen server-socket 5)
- (let lp ((client (accept-new-client)))
- ;; If client is false, we are shutting down.
- (if client
- (let ((client-socket (car client))
- (client-addr (cdr client)))
- (add-open-socket! client-socket)
- (make-thread serve-client client-socket client-addr)
- (lp (accept-new-client))))))
-
-(define* (spawn-server #:optional (server-socket (make-tcp-server-socket)))
- (make-thread run-server server-socket))
-
-(define (serve-client client addr)
- (with-continuation-barrier
- (lambda ()
- (with-input-from-port client
- (lambda ()
- (with-output-to-port client
- (lambda ()
- (with-error-to-port client
- (lambda ()
- (with-fluids ((*repl-stack* '()))
- (start-repl))))))))))
- (close-socket! client))