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Name	Size	Permission	Date
peg	[ DIR ]	drwxr-xr-x	2025-02-07 15:04
and-let-star.scm	2.53 KB	-rw-r--r--	2022-02-10 20:40
arrays.scm	2.63 KB	-rw-r--r--	2022-02-10 20:40
atomic.scm	1.55 KB	-rw-r--r--	2022-02-10 20:40
binary-ports.scm	2.71 KB	-rw-r--r--	2022-02-10 20:40
boot-9.scm	166.75 KB	-rw-r--r--	2022-02-10 20:40
buffered-input.scm	4.82 KB	-rw-r--r--	2022-02-10 20:40
calling.scm	10.54 KB	-rw-r--r--	2022-02-10 20:40
command-line.scm	18.6 KB	-rw-r--r--	2022-02-10 20:40
common-list.scm	8.95 KB	-rw-r--r--	2022-02-10 20:40
control.scm	4.08 KB	-rw-r--r--	2022-02-10 20:40
copy-tree.scm	3.05 KB	-rw-r--r--	2022-02-10 20:40
curried-definitions.scm	1.79 KB	-rw-r--r--	2022-02-10 20:40
deprecated.scm	1.54 KB	-rw-r--r--	2022-02-10 20:40
documentation.scm	7.41 KB	-rw-r--r--	2022-03-05 22:19
eval-string.scm	2.99 KB	-rw-r--r--	2022-02-10 20:40
eval.scm	25.08 KB	-rw-r--r--	2022-02-10 20:40
exceptions.scm	14.38 KB	-rw-r--r--	2022-02-10 20:40
expect.scm	5.5 KB	-rw-r--r--	2022-02-10 20:40
fdes-finalizers.scm	1.06 KB	-rw-r--r--	2022-02-10 20:40
format.scm	65.47 KB	-rw-r--r--	2022-02-10 20:40
ftw.scm	25.05 KB	-rw-r--r--	2022-02-10 20:40
futures.scm	10.49 KB	-rw-r--r--	2022-02-10 20:40
gap-buffer.scm	9.59 KB	-rw-r--r--	2022-02-10 20:40
getopt-long.scm	16.49 KB	-rw-r--r--	2022-02-10 20:40
hash-table.scm	1.77 KB	-rw-r--r--	2022-02-10 20:40
hcons.scm	2.55 KB	-rw-r--r--	2022-02-10 20:40
history.scm	2.29 KB	-rw-r--r--	2022-02-10 20:40
i18n.scm	20.51 KB	-rw-r--r--	2022-02-10 20:40
iconv.scm	3.19 KB	-rw-r--r--	2022-02-10 20:40
lineio.scm	3.85 KB	-rw-r--r--	2022-02-10 20:40
list.scm	1.29 KB	-rw-r--r--	2022-02-10 20:40
local-eval.scm	9.84 KB	-rw-r--r--	2022-02-10 20:40
ls.scm	3.2 KB	-rw-r--r--	2022-02-10 20:40
match.scm	2.18 KB	-rw-r--r--	2022-02-10 20:40
match.upstream.scm	37.33 KB	-rw-r--r--	2022-02-10 20:40
networking.scm	3.33 KB	-rw-r--r--	2022-02-10 20:40
null.scm	1.21 KB	-rw-r--r--	2022-02-10 20:40
occam-channel.scm	7.26 KB	-rw-r--r--	2022-02-10 20:40
optargs.scm	15.75 KB	-rw-r--r--	2022-02-10 20:40
peg.scm	1.64 KB	-rw-r--r--	2022-02-10 20:40
poe.scm	3.3 KB	-rw-r--r--	2022-02-10 20:40
poll.scm	5.79 KB	-rw-r--r--	2022-02-10 20:40
popen.scm	9.27 KB	-rw-r--r--	2022-02-10 20:40
ports.scm	19.08 KB	-rw-r--r--	2022-02-10 20:40
posix.scm	2.73 KB	-rw-r--r--	2022-02-10 20:40
pretty-print.scm	16.88 KB	-rw-r--r--	2022-02-10 20:40
psyntax-pp.scm	183.78 KB	-rw-r--r--	2022-02-10 20:40
psyntax.scm	149.4 KB	-rw-r--r--	2022-02-10 20:40
q.scm	4.2 KB	-rw-r--r--	2022-02-10 20:40
quasisyntax.scm	5.22 KB	-rw-r--r--	2022-02-10 20:40
r5rs.scm	1.56 KB	-rw-r--r--	2022-02-10 20:40
r6rs-libraries.scm	12.52 KB	-rw-r--r--	2022-02-10 20:40
r7rs-libraries.scm	4.28 KB	-rw-r--r--	2022-02-10 20:40
rdelim.scm	7.72 KB	-rw-r--r--	2022-02-10 20:40
read.scm	32.69 KB	-rw-r--r--	2022-02-10 20:40
readline.scm	9.56 KB	-rw-r--r--	2022-02-10 20:40
receive.scm	1.06 KB	-rw-r--r--	2022-02-10 20:40
regex.scm	8.87 KB	-rw-r--r--	2022-02-10 20:40
runq.scm	8.18 KB	-rw-r--r--	2022-02-10 20:40
rw.scm	1.02 KB	-rw-r--r--	2022-02-10 20:40
safe-r5rs.scm	7.5 KB	-rw-r--r--	2022-02-10 20:40
safe.scm	1.25 KB	-rw-r--r--	2022-02-10 20:40
sandbox.scm	34.24 KB	-rw-r--r--	2022-02-10 20:40
save-stack.scm	2.15 KB	-rw-r--r--	2022-02-10 20:40
scm-style-repl.scm	11.62 KB	-rw-r--r--	2022-02-10 20:40
serialize.scm	3.78 KB	-rw-r--r--	2022-02-10 20:40
session.scm	17.72 KB	-rw-r--r--	2022-02-10 20:40
slib.scm	1.55 KB	-rw-r--r--	2022-02-10 20:40
stack-catch.scm	1.94 KB	-rw-r--r--	2022-02-10 20:40
streams.scm	5.86 KB	-rw-r--r--	2022-02-10 20:40
string-fun.scm	9.68 KB	-rw-r--r--	2022-02-10 20:40
suspendable-ports.scm	29.86 KB	-rw-r--r--	2022-02-10 20:40
textual-ports.scm	2.29 KB	-rw-r--r--	2022-02-10 20:40
threads.scm	12.54 KB	-rw-r--r--	2022-02-10 20:40
time.scm	2.07 KB	-rw-r--r--	2022-02-10 20:40
top-repl.scm	2.63 KB	-rw-r--r--	2022-02-10 20:40
unicode.scm	1005 B	-rw-r--r--	2022-02-10 20:40
vlist.scm	21.56 KB	-rw-r--r--	2022-02-10 20:40
weak-vector.scm	1.2 KB	-rw-r--r--	2022-02-10 20:40

Rename

;;;; 	Copyright (C) 2003, 2006 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
;;;;

;;; Commentary:

;; (serialize FORM1 ...) and (parallelize FORM1 ...) are useful when
;; you don't trust the thread safety of most of your program, but
;; where you have some section(s) of code which you consider can run
;; in parallel to other sections.
;;
;; They "flag" (with dynamic extent) sections of code to be of
;; "serial" or "parallel" nature and have the single effect of
;; preventing a serial section from being run in parallel with any
;; serial section (including itself).
;;
;; Both serialize and parallelize can be nested.  If so, the
;; inner-most construct is in effect.
;;
;; NOTE 1: A serial section can run in parallel with a parallel
;; section.
;;
;; NOTE 2: If a serial section S is "interrupted" by a parallel
;; section P in the following manner: S = S1 P S2, S2 is not
;; guaranteed to be resumed by the same thread that previously
;; executed S1.
;;
;; WARNING: Spawning new threads within a serial section have
;; undefined effects.  It is OK, though, to spawn threads in unflagged
;; sections of code where neither serialize or parallelize is in
;; effect.
;;
;; A typical usage is when Guile is used as scripting language in some
;; application doing heavy computations.  If each thread is
;; encapsulated with a serialize form, you can then put a parallelize
;; form around the code performing the heavy computations (typically a
;; C code primitive), enabling the computations to run in parallel
;; while the scripting code runs single-threadedly.
;;

;;; Code:

(define-module (ice-9 serialize)
  :use-module (ice-9 threads)
  :export (call-with-serialization
	   call-with-parallelization)
  :export-syntax (serialize
		  parallelize))

(define serialization-mutex (make-mutex))
(define admin-mutex (make-mutex))
(define owner #f)

(define (call-with-serialization thunk)
  (let ((outer-owner #f))
    (dynamic-wind
	(lambda ()
	  (lock-mutex admin-mutex)
	  (set! outer-owner owner)
	  (if (not (eqv? outer-owner (current-thread)))
	      (begin
		(unlock-mutex admin-mutex)
		(lock-mutex serialization-mutex)
		(set! owner (current-thread)))
	      (unlock-mutex admin-mutex)))
	thunk
	(lambda ()
	  (lock-mutex admin-mutex)
	  (if (not (eqv? outer-owner (current-thread)))
	      (begin
		(set! owner #f)
		(unlock-mutex serialization-mutex)))
	  (unlock-mutex admin-mutex)))))

(define-macro (serialize . forms)
  `(call-with-serialization (lambda () ,@forms)))

(define (call-with-parallelization thunk)
  (let ((outer-owner #f))
    (dynamic-wind
	(lambda ()
	  (lock-mutex admin-mutex)
	  (set! outer-owner owner)
	  (if (eqv? outer-owner (current-thread))
	      (begin
		(set! owner #f)
		(unlock-mutex serialization-mutex)))
	  (unlock-mutex admin-mutex))
	thunk
	(lambda ()
	  (lock-mutex admin-mutex)
	  (if (eqv? outer-owner (current-thread))
	      (begin
		(unlock-mutex admin-mutex)
		(lock-mutex serialization-mutex)
		(set! owner outer-owner))
	      (unlock-mutex admin-mutex))))))

(define-macro (parallelize . forms)
  `(call-with-parallelization (lambda () ,@forms)))