;;; -*- Mode: Scheme -*-

;;;; Concurrent ML for Scheme
;;;; MIT Scheme: Miscellanea

;;; Copyright (c) 2009, Taylor R. Campbell
;;;
;;; Redistribution and use in source and binary forms, with or without
;;; modification, are permitted provided that the following conditions
;;; are met:
;;;
;;; * Redistributions of source code must retain the above copyright
;;;   notice, this list of conditions and the following disclaimer.
;;;
;;; * Redistributions in binary form must reproduce the above copyright
;;;   notice, this list of conditions and the following disclaimer in
;;;   the documentation and/or other materials provided with the
;;;   distribution.
;;;
;;; * Neither the names of the authors nor the names of contributors
;;;   may be used to endorse or promote products derived from this
;;;   software without specific prior written permission.
;;;
;;; THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
;;; OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
;;; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
;;; ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
;;; DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
;;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
;;; GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
;;; INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
;;; WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
;;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
;;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

(declare (usual-integrations))

(define (spawn thunk #!optional name)
  (let ((thread (create-thread #f thunk)))
    (if (and (not (default-object? name))
             name)
        (1d-table/put! (thread/properties thread) 'NAME name))
    thread))

(define (sleep duration)
  (sleep-current-thread duration))

(define (list-sort! < list)
  (sort list <))

(define (compose-nullary procedure nullary-procedure)
  (lambda ()
    (procedure (nullary-procedure))))

(define (compose-unary procedure unary-procedure)
  (lambda (argument)
    (procedure (unary-procedure argument))))