home *** CD-ROM | disk | FTP | other *** search
- ;;;; Copyright (C) 1996, 1998, 2001 Free Software Foundation, Inc.
- ;;;;
- ;;;; This program is free software; you can redistribute it and/or modify
- ;;;; it under the terms of the GNU General Public License as published by
- ;;;; the Free Software Foundation; either version 2, or (at your option)
- ;;;; any later version.
- ;;;;
- ;;;; This program 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 General Public License for more details.
- ;;;;
- ;;;; You should have received a copy of the GNU General Public License
- ;;;; along with this software; see the file COPYING. If not, write to
- ;;;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
- ;;;; Boston, MA 02111-1307 USA
- ;;;;
- ;;;; As a special exception, the Free Software Foundation gives permission
- ;;;; for additional uses of the text contained in its release of GUILE.
- ;;;;
- ;;;; The exception is that, if you link the GUILE library with other files
- ;;;; to produce an executable, this does not by itself cause the
- ;;;; resulting executable to be covered by the GNU General Public License.
- ;;;; Your use of that executable is in no way restricted on account of
- ;;;; linking the GUILE library code into it.
- ;;;;
- ;;;; This exception does not however invalidate any other reasons why
- ;;;; the executable file might be covered by the GNU General Public License.
- ;;;;
- ;;;; This exception applies only to the code released by the
- ;;;; Free Software Foundation under the name GUILE. If you copy
- ;;;; code from other Free Software Foundation releases into a copy of
- ;;;; GUILE, as the General Public License permits, the exception does
- ;;;; not apply to the code that you add in this way. To avoid misleading
- ;;;; anyone as to the status of such modified files, you must delete
- ;;;; this exception notice from them.
- ;;;;
- ;;;; If you write modifications of your own for GUILE, it is your choice
- ;;;; whether to permit this exception to apply to your modifications.
- ;;;; If you do not wish that, delete this exception notice.
- ;;;;
- ;;;; ----------------------------------------------------------------
- ;;;; threads.scm -- User-level interface to Guile's thread system
- ;;;; 4 March 1996, Anthony Green <green@cygnus.com>
- ;;;; Modified 5 October 1996, MDJ <djurfeldt@nada.kth.se>
- ;;;; Modified 6 April 2001, ttn
- ;;;; ----------------------------------------------------------------
- ;;;;
-
- ;;; Commentary:
-
- ;; This module is documented in the Guile Reference Manual.
- ;; Briefly, one procedure is exported: `%thread-handler';
- ;; as well as four macros: `make-thread', `begin-thread',
- ;; `with-mutex' and `monitor'.
-
- ;;; Code:
-
- (define-module (ice-9 threads)
- :export-syntax (make-thread
- begin-thread
- with-mutex
- monitor)
- :export (%thread-handler))
-
-
-
- (define (%thread-handler tag . args)
- (fluid-set! the-last-stack #f)
- (unmask-signals)
- (let ((n (length args))
- (p (current-error-port)))
- (display "In thread:" p)
- (newline p)
- (if (>= n 3)
- (display-error #f
- p
- (car args)
- (cadr args)
- (caddr args)
- (if (= n 4)
- (cadddr args)
- '()))
- (begin
- (display "uncaught throw to " p)
- (display tag p)
- (display ": " p)
- (display args p)
- (newline p)))))
-
- ; --- MACROS -------------------------------------------------------
-
- (defmacro make-thread (proc . args)
- `(call-with-new-thread
- (lambda ()
- (,proc ,@args))
- %thread-handler))
-
- (defmacro begin-thread (first . rest)
- `(call-with-new-thread
- (lambda ()
- (begin
- ,first ,@rest))
- %thread-handler))
-
- (defmacro with-mutex (m . body)
- `(dynamic-wind
- (lambda () (lock-mutex ,m))
- (lambda () (begin ,@body))
- (lambda () (unlock-mutex ,m))))
-
- (defmacro monitor (first . rest)
- `(with-mutex ,(make-mutex)
- (begin
- ,first ,@rest)))
-
- ;;; threads.scm ends here
-