mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-04-30 20:00:19 +02:00
117 lines
4 KiB
Scheme
117 lines
4 KiB
Scheme
;;;; 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., 51 Franklin Street, Fifth Floor,
|
||
;;;; Boston, MA 02110-1301 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
|