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97 lines
2.8 KiB
Scheme
97 lines
2.8 KiB
Scheme
;;;; Copyright (C) 1996, 1998, 2001 Free Software Foundation, Inc.
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;;;;
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;;;; This program is free software; you can redistribute it and/or modify
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;;;; it under the terms of the GNU General Public License as published by
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;;;; the Free Software Foundation; either version 2, or (at your option)
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;;;; any later version.
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;;;;
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;;;; This program is distributed in the hope that it will be useful,
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;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;;; GNU General Public License for more details.
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;;;;
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;;;; You should have received a copy of the GNU General Public License
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;;;; along with this software; see the file COPYING. If not, write to
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;;;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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;;;; Boston, MA 02111-1307 USA
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;;;;
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;;;; ----------------------------------------------------------------
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;;;; threads.scm -- User-level interface to Guile's thread system
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;;;; 4 March 1996, Anthony Green <green@cygnus.com>
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;;;; Modified 5 October 1996, MDJ <djurfeldt@nada.kth.se>
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;;;; Modified 6 April 2001, ttn
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;;;; ----------------------------------------------------------------
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;;;;
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;;; Commentary:
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;; This module is documented in the Guile Reference Manual.
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;; Briefly, one procedure is exported: `%thread-handler';
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;; as well as four macros: `make-thread', `begin-thread',
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;; `with-mutex' and `monitor'.
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;;; Code:
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(define-module (ice-9 threads))
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(define (%thread-handler tag . args)
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(fluid-set! the-last-stack #f)
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(unmask-signals)
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(let ((n (length args))
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(p (current-error-port)))
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(display "In thread:" p)
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(newline p)
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(if (>= n 3)
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(display-error #f
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p
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(car args)
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(cadr args)
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(caddr args)
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(if (= n 4)
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(cadddr args)
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'()))
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(begin
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(display "uncaught throw to " p)
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(display tag p)
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(display ": " p)
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(display args p)
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(newline p)))))
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; --- MACROS -------------------------------------------------------
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(defmacro make-thread (proc . args)
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`(call-with-new-thread
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(lambda ()
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(,proc ,@args))
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%thread-handler))
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(defmacro begin-thread (first . rest)
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`(call-with-new-thread
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(lambda ()
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(begin
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,first ,@rest))
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%thread-handler))
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(defmacro with-mutex (m . body)
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`(dynamic-wind
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(lambda () (lock-mutex ,m))
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(lambda () (begin ,@body))
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(lambda () (unlock-mutex ,m))))
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(defmacro monitor (first . rest)
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`(with-mutex ,(make-mutex)
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(begin
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,first ,@rest)))
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;; export
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(export %thread-handler)
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(export-syntax make-thread
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begin-thread
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with-mutex
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monitor)
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;;; threads.scm ends here
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