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31 changed files with 1601 additions and 5228 deletions
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26
.forgejo/workflows/build-website.yaml
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on:
push:
branches:
- trunk
jobs:
test:
runs-on: host
steps:
- run: git clone --depth=1 https://$FORGEJO_TOKEN@forge.cbaines.net/cbaines/guile-knots.git knots-trunk
- run: git clone --depth=1 https://$FORGEJO_TOKEN@forge.cbaines.net/cbaines/guile-knots.git --branch=pages knots-pages
- run: |
cd knots-trunk
guix shell -D -f guix-dev.scm -- documenta api "knots.scm knots/"
guix shell texinfo -- makeinfo --css-ref=https://luis-felipe.gitlab.io/texinfo-css/static/css/texinfo-7.css --no-split --html -c SHOW_TITLE=true -o ../knots-pages/index.html doc/index.texi
- run: |
cd knots-pages
git add .
if [[ -z "$(git status -s)" ]]; then
echo "Nothing to push"
else
git config user.email ""
git config user.name "Automatic website updater"
git commit -m "Automatic website update"
git push
fi

20
.gitignore vendored
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*.go
Makefile.in
Makefile
aclocal.m4
autom4te.cache
config.log
config.status
configure
build-aux/install-sh
build-aux/missing
*.log
tests/*.log
tests/*.trs
pre-inst-env
test-env
.local.envrc

674
COPYING
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@ -1,674 +0,0 @@
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<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
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 3 of the License, 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 program. If not, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

33
Makefile.am
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@ -1,33 +0,0 @@
include guile.am
SOURCES = \
knots.scm \
knots/non-blocking.scm \
knots/parallelism.scm \
knots/promise.scm \
knots/queue.scm \
knots/resource-pool.scm \
knots/timeout.scm \
knots/web-server.scm \
knots/thread-pool.scm
SCM_TESTS = \
tests/non-blocking.scm \
tests/promise.scm \
tests/timeout.scm \
tests/non-blocking.scm \
tests/queue.scm \
tests/web-server.scm \
tests/parallelism.scm \
tests/resource-pool.scm \
tests/thread-pool.scm
TESTS_GOBJECTS = $(SCM_TESTS:%.scm=%.go)
EXTRA_DIST = \
README \
bootstrap \
pre-inst-env.in
check: $(GOBJECTS) $(TESTS_GOBJECTS)
find tests -name "*.scm" | xargs -t -L1 ./test-env guile

4
README
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@ -1,4 +0,0 @@
-*- mode: org -*-
This Guile library provides useful patterns and functionality to use
Guile Fibers.

3
bootstrap
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@ -1,3 +0,0 @@
#! /bin/sh
autoreconf --verbose --install --force

20
configure.ac
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@ -1,20 +0,0 @@
AC_INIT([guile-knots], [0.1])
AC_CONFIG_AUX_DIR([build-aux])
AM_INIT_AUTOMAKE([-Wall -Werror foreign])
GUILE_PKG([3.0])
GUILE_PROGS
if test "x$GUILD" = "x"; then
AC_MSG_ERROR(['guild' binary not found; please check your guile 3 installation.])
fi
if test "$cross_compiling" != no; then
GUILE_TARGET="--target=$host_alias"
AC_SUBST([GUILE_TARGET])
fi
AC_CONFIG_FILES([Makefile])
AC_CONFIG_FILES([pre-inst-env], [chmod +x pre-inst-env])
AC_CONFIG_FILES([test-env], [chmod +x test-env])
AC_OUTPUT

96
doc/index.texi
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@ -1,96 +0,0 @@
\input texinfo
@setfilename guile-knots
@c HEADER
@settitle Guile Knots
@documentlanguage en
@documentencoding UTF-8
@afourpaper
@c END HEADER
@c MASTER MENU
@node Top
@top Overview
Guile Knots is a library providing tools and patterns for programming
with @url{https://github.com/wingo/fibers, Guile Fibers}. Guile Knots
provides higher level building blocks for writing programs using Guile
Fibers, including managing code that can't run in a thread used by
fibers. Also included is a web server implementation using Fibers,
which while being similar to the web server provided by Fibers, can
provide some benefits in specific circumstances.
@c END MASTER MENU
@c TABLE OF CONTENTS
@contents
@c END TABLE OF CONTENTS
@c CHAPTER: API
@include api/index.texi
@c END CHAPTER: API
@c APPENDICES
@node Version History
@appendix Version History
@table @dfn
@item Version 0.Y.0, Month DD, 20YY
@itemize
@item
No initial release has yet been made.
@end itemize
@end table
@node Copying Information
@appendix Copying Information
Copyright © 2024, 2025 Christopher Baines <mail@@cbaines.net>
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.
@c END APPENDICES
@c INDICES
@node Concept Index
@unnumbered Concept Index
@printindex cp
@node Data Type Index
@unnumbered Data Type Index
@printindex tp
@node Procedure Index
@unnumbered Procedure Index
@printindex fn
@node Variable Index
@unnumbered Variable Index
@printindex vr
@c END INDICES
@bye

21
guile.am
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@ -1,21 +0,0 @@
moddir=$(datadir)/guile/site/$(GUILE_EFFECTIVE_VERSION)
godir=$(libdir)/guile/$(GUILE_EFFECTIVE_VERSION)/site-ccache
GOBJECTS = $(SOURCES:%.scm=%.go)
nobase_dist_mod_DATA = $(SOURCES) $(NOCOMP_SOURCES)
nobase_go_DATA = $(GOBJECTS)
# Make sure source files are installed first, so that the mtime of
# installed compiled files is greater than that of installed source
# files. See
# <http://lists.gnu.org/archive/html/guile-devel/2010-07/msg00125.html>
# for details.
guile_install_go_files = install-nobase_goDATA
$(guile_install_go_files): install-nobase_dist_modDATA
CLEANFILES = $(GOBJECTS)
GUILE_WARNINGS = -Wunbound-variable -Warity-mismatch -Wformat
SUFFIXES = .scm .go
.scm.go:
$(AM_V_GEN)$(top_builddir)/pre-inst-env $(GUILD) compile $(GUILE_TARGET) $(GUILE_WARNINGS) -o "$@" "$<"

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guix-dev.scm
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;;; Guile Knots
;;; Copyright © 2020 Christopher Baines <mail@cbaines.net>
;;;
;;; This file is part of Guile Knots.
;;;
;;; The Guile Knots 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 3 of the
;;; License, or (at your option) any later version.
;;;
;;; The Guile Knots 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 the guix-data-service. If not, see
;;; <http://www.gnu.org/licenses/>.
;;; Run the following command to enter a development environment for
;;; Guile Knots:
;;;
;;; $ guix environment -l guix-dev.scm
(use-modules ((guix licenses) #:prefix license:)
(guix packages)
(guix build-system gnu)
(gnu packages)
(gnu packages autotools)
(gnu packages guile)
(gnu packages guile-xyz)
(gnu packages pkg-config)
(gnu packages texinfo)
(srfi srfi-1))
(package
(name "guile-knots")
(version "0.0.0")
(source #f)
(build-system gnu-build-system)
(inputs
(list guile-next
guile-fibers-next))
(native-inputs
(list autoconf
automake
pkg-config
guile-documenta
texinfo))
(synopsis "TODO")
(description "TODO")
(home-page "TODO")
(license license:gpl3+))

1601
index.html Normal file
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130
knots.scm
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(define-module (knots)
#:use-module (srfi srfi-1)
#:use-module (ice-9 match)
#:use-module (ice-9 suspendable-ports)
#:use-module (fibers conditions)
#:use-module (system repl debug)
#:export (call-with-default-io-waiters
wait-when-system-clock-behind
call-with-sigint
&knots-exception
make-knots-exception
knots-exception?
knots-exception-stack
print-backtrace-and-exception/knots))
(define (call-with-default-io-waiters thunk)
(parameterize
((current-read-waiter (@@ (ice-9 suspendable-ports)
default-read-waiter))
(current-write-waiter (@@ (ice-9 suspendable-ports)
default-write-waiter)))
(thunk)))
(define (wait-when-system-clock-behind)
(let ((start-of-the-year-2000 946684800))
(while (< (current-time)
start-of-the-year-2000)
(simple-format (current-error-port)
"warning: system clock potentially behind, waiting\n")
(sleep 20))))
;; Copied from (fibers web server)
(define (call-with-sigint thunk cvar)
(let ((handler #f))
(dynamic-wind
(lambda ()
(set! handler
(sigaction SIGINT (lambda (sig) (signal-condition! cvar)))))
thunk
(lambda ()
(if handler
;; restore Scheme handler, SIG_IGN or SIG_DFL.
(sigaction SIGINT (car handler) (cdr handler))
;; restore original C handler.
(sigaction SIGINT #f))))))
(define &knots-exception
(make-exception-type '&knots-exception
&exception
'(stack)))
(define make-knots-exception
(record-constructor &knots-exception))
(define knots-exception?
(exception-predicate &knots-exception))
(define knots-exception-stack
(exception-accessor
&knots-exception
(record-accessor &knots-exception 'stack)))
(define* (print-backtrace-and-exception/knots
exn
#:key (port (current-error-port)))
(let* ((stack
(match (fluid-ref %stacks)
((stack-tag . prompt-tag)
(make-stack #t
0 prompt-tag
0 (and prompt-tag 1)))
(_
(make-stack #t))))
(stack-len
(stack-length stack))
(error-string
(call-with-output-string
(lambda (port)
(let ((knots-stacks
(map knots-exception-stack
(filter knots-exception?
(simple-exceptions exn)))))
(let* ((stack-vec
(stack->vector stack))
(stack-vec-length
(vector-length stack-vec)))
(print-frames (list->vector
(drop
(vector->list stack-vec)
(if (< stack-vec-length 5)
0
4)))
port
#:count (stack-length stack)))
(for-each
(lambda (stack)
(let* ((stack-vec
(stack->vector stack))
(stack-vec-length
(vector-length stack-vec)))
(print-frames (list->vector
(drop
(vector->list stack-vec)
(if (< stack-vec-length 4)
0
3)))
port
#:count (stack-length stack))))
knots-stacks)
(print-exception
port
(if (null? knots-stacks)
(stack-ref stack
(if (< stack-len 4)
stack-len
4))
(let* ((stack (last knots-stacks))
(stack-len (stack-length stack)))
(stack-ref stack
(if (< stack-len 3)
stack-len
3))))
'%exception
(list exn)))))))
(display error-string port)))

62
knots/non-blocking.scm
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;;; Guile Knots
;;; Copyright © 2020 Christopher Baines <mail@cbaines.net>
;;;
;;; This file is part of Guile Knots.
;;;
;;; The Guile Knots 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 3 of the
;;; License, or (at your option) any later version.
;;;
;;; The Guile Knots 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 the guix-data-service. If not, see
;;; <http://www.gnu.org/licenses/>.
(define-module (knots non-blocking)
#:use-module (web uri)
#:use-module (web client)
#:export (non-blocking-port
non-blocking-open-socket-for-uri))
(define (non-blocking-port port)
"Make PORT non-blocking and return it."
(let ((flags (fcntl port F_GETFL)))
(when (zero? (logand O_NONBLOCK flags))
(fcntl port F_SETFL (logior O_NONBLOCK flags)))
port))
(define* (non-blocking-open-socket-for-uri uri
#:key (verify-certificate? #t))
(define tls-wrap
(@@ (web client) tls-wrap))
(define https?
(eq? 'https (uri-scheme uri)))
(define plain-uri
(if https?
(build-uri
'http
#:userinfo (uri-userinfo uri)
#:host (uri-host uri)
#:port (or (uri-port uri) 443)
#:path (uri-path uri)
#:query (uri-query uri)
#:fragment (uri-fragment uri))
uri))
(let ((s (open-socket-for-uri plain-uri)))
(if https?
(let ((port
(tls-wrap s (uri-host uri)
#:verify-certificate? verify-certificate?)))
;; Guile/guile-gnutls don't handle the handshake happening on a non
;; blocking socket, so change the behavior here.
(non-blocking-port s)
port)
(non-blocking-port s))))

340
knots/parallelism.scm
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;;; Guile Knots
;;; Copyright © 2020 Christopher Baines <mail@cbaines.net>
;;;
;;; This file is part of Guile Knots.
;;;
;;; The Guile Knots 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 3 of the
;;; License, or (at your option) any later version.
;;;
;;; The Guile Knots 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 the guix-data-service. If not, see
;;; <http://www.gnu.org/licenses/>.
(define-module (knots parallelism)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-71)
#:use-module (srfi srfi-9)
#:use-module (srfi srfi-9 gnu)
#:use-module (srfi srfi-43)
#:use-module (ice-9 match)
#:use-module (ice-9 control)
#:use-module (ice-9 exceptions)
#:use-module (fibers)
#:use-module (fibers channels)
#:use-module (fibers operations)
#:use-module (knots)
#:use-module (knots resource-pool)
#:export (fibers-batch-map
fibers-map
fibers-map-with-progress
fibers-batch-for-each
fibers-for-each
fibers-parallel
fibers-let
fiberize
make-parallelism-limiter
parallelism-limiter?
destroy-parallelism-limiter
call-with-parallelism-limiter
with-parallelism-limiter))
(define (defer-to-parallel-fiber thunk)
(let ((reply (make-channel)))
(spawn-fiber
(lambda ()
(with-exception-handler
(lambda (exn)
(put-message
reply
(cons 'exception exn)))
(lambda ()
(with-exception-handler
(lambda (exn)
(let ((stack
(match (fluid-ref %stacks)
((stack-tag . prompt-tag)
(make-stack #t
0 prompt-tag
0 (and prompt-tag 1)))
(_
(make-stack #t)))))
(raise-exception
(make-exception
exn
(make-knots-exception stack)))))
(lambda ()
(call-with-values
(lambda ()
(start-stack #t (thunk)))
(lambda vals
(put-message reply (cons 'result vals)))))))
#:unwind? #t))
#:parallel? #t)
reply))
(define (fetch-result-of-defered-thunks . reply-channels)
(let ((responses (map get-message
reply-channels)))
(map
(match-lambda
(('exception . exn)
(raise-exception exn))
(('result . vals)
(apply values vals)))
responses)))
(define (fibers-batch-map proc parallelism-limit . lists)
"Map PROC over LISTS in parallel, with a PARALLELISM-LIMIT. If any of
the invocations of PROC raise an exception, this will be raised once
all of the calls to PROC have finished."
(define vecs (map (lambda (list-or-vec)
(if (vector? list-or-vec)
list-or-vec
(list->vector list-or-vec)))
lists))
(define vecs-length
(vector-length (first vecs)))
(define result-vec
(make-vector vecs-length))
(let loop ((next-to-process-index
(if (= 0 vecs-length)
#f
0))
(channel-indexes '()))
(if (and (eq? #f next-to-process-index)
(null? channel-indexes))
(let ((processed-result-vec
(vector-map
(lambda (_ result-or-exn)
(match result-or-exn
(('exception . exn)
(raise-exception exn))
(('result . vals)
(car vals))))
result-vec)))
(if (vector? (first lists))
processed-result-vec
(vector->list processed-result-vec)))
(if (or (= (length channel-indexes)
(min parallelism-limit vecs-length))
(eq? #f next-to-process-index))
(let ((new-index
new-channel-indexes
(perform-operation
(apply
choice-operation
(map
(lambda (index)
(wrap-operation
(get-operation
(vector-ref result-vec index))
(lambda (result)
(vector-set! result-vec
index
result)
(values next-to-process-index
(lset-difference =
channel-indexes
(list index))))))
channel-indexes)))))
(loop new-index
new-channel-indexes))
(loop (if (= (+ 1 next-to-process-index)
vecs-length)
#f
(+ 1 next-to-process-index))
(begin
(vector-set!
result-vec
next-to-process-index
(defer-to-parallel-fiber
(lambda ()
(apply proc
(map (lambda (vec)
(vector-ref vec next-to-process-index))
vecs)))))
(cons next-to-process-index
channel-indexes)))))))
(define (fibers-map proc . lists)
"Map PROC over LISTS in parallel, running up to 20 fibers in
PARALLEL. If any of the invocations of PROC raise an exception, this
will be raised once all of the calls to PROC have finished."
(apply fibers-batch-map proc 20 lists))
(define (fibers-batch-for-each proc parallelism-limit . lists)
"Call PROC on LISTS, running up to PARALLELISM-LIMIT fibers in
parallel."
(apply fibers-batch-map
(lambda args
(apply proc args)
*unspecified*)
parallelism-limit
lists)
*unspecified*)
(define (fibers-for-each proc . lists)
"Call PROC on LISTS, running up to 20 fibers in parallel."
(apply fibers-batch-for-each proc 20 lists))
(define-syntax fibers-parallel
(lambda (x)
"Run each expression in parallel. If any expression raises an
exception, this will be raised after all exceptions have finished."
(syntax-case x ()
((_ e0 ...)
(with-syntax (((tmp0 ...) (generate-temporaries (syntax (e0 ...)))))
#'(let ((tmp0 (defer-to-parallel-fiber
(lambda ()
e0)))
...)
(apply values (fetch-result-of-defered-thunks tmp0 ...))))))))
(define-syntax-rule (fibers-let ((v e) ...) b0 b1 ...)
"Let, but run each binding in a fiber in parallel."
(call-with-values
(lambda () (fibers-parallel e ...))
(lambda (v ...)
b0 b1 ...)))
(define* (fibers-map-with-progress proc lists #:key report)
"Map PROC over LISTS, calling #:REPORT if specified after each
invocation of PROC finishes. REPORT is passed the results for each
element of LISTS, or #f if no result has been received yet."
(let loop ((channels-to-results
(apply map
(lambda args
(cons (defer-to-parallel-fiber
(lambda ()
(apply proc args)))
#f))
lists)))
(let ((active-channels
(filter-map car channels-to-results)))
(when report
(report (apply map
list
(map cdr channels-to-results)
lists)))
(if (null? active-channels)
(map
(match-lambda
((#f . ('exception . exn))
(raise-exception exn))
((#f . ('result . vals))
(car vals)))
channels-to-results)
(loop
(perform-operation
(apply
choice-operation
(filter-map
(lambda (p)
(match p
((channel . _)
(if channel
(wrap-operation
(get-operation channel)
(lambda (result)
(map (match-lambda
((c . r)
(if (eq? channel c)
(cons #f result)
(cons c r))))
channels-to-results)))
#f))))
channels-to-results))))))))
(define* (fiberize proc
#:key (parallelism 1)
(input-channel (make-channel))
(process-channel input-channel))
(for-each
(lambda _
(spawn-fiber
(lambda ()
(while #t
(let ((reply-channel args (car+cdr
(get-message process-channel))))
(put-message
reply-channel
(with-exception-handler
(lambda (exn)
(cons 'exception exn))
(lambda ()
(with-exception-handler
(lambda (exn)
(let ((stack
(match (fluid-ref %stacks)
((stack-tag . prompt-tag)
(make-stack #t
0 prompt-tag
0 (and prompt-tag 1)))
(_
(make-stack #t)))))
(raise-exception
(make-exception
exn
(make-knots-exception stack)))))
(lambda ()
(call-with-values
(lambda ()
(start-stack #t (apply proc args)))
(lambda vals
(cons 'result vals))))))
#:unwind? #t)))))
#:parallel? #t))
(iota parallelism))
(lambda args
(let ((reply-channel (make-channel)))
(put-message input-channel (cons reply-channel args))
(match (get-message reply-channel)
(('result . vals) (apply values vals))
(('exception . exn)
(raise-exception exn))))))
(define-record-type <parallelism-limiter>
(make-parallelism-limiter-record resource-pool)
parallelism-limiter?
(resource-pool parallelism-limiter-resource-pool))
(define* (make-parallelism-limiter limit #:key (name "unnamed"))
(make-parallelism-limiter-record
(make-fixed-size-resource-pool
(iota limit)
#:name name)))
(define (destroy-parallelism-limiter parallelism-limiter)
(destroy-resource-pool
(parallelism-limiter-resource-pool
parallelism-limiter)))
(define* (call-with-parallelism-limiter parallelism-limiter thunk)
(call-with-resource-from-pool
(parallelism-limiter-resource-pool parallelism-limiter)
(lambda _
(thunk))))
(define-syntax-rule (with-parallelism-limiter parallelism-limiter exp ...)
(call-with-parallelism-limiter
parallelism-limiter
(lambda () exp ...)))

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knots/promise.scm
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;;; Guile Knots
;;; Copyright © 2020 Christopher Baines <mail@cbaines.net>
;;;
;;; This file is part of Guile Knots.
;;;
;;; The Guile Knots 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 3 of the
;;; License, or (at your option) any later version.
;;;
;;; The Guile Knots 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 the guix-data-service. If not, see
;;; <http://www.gnu.org/licenses/>.
(define-module (knots promise)
#:use-module (srfi srfi-9)
#:use-module (ice-9 match)
#:use-module (ice-9 atomic)
#:use-module (ice-9 exceptions)
#:use-module (fibers)
#:use-module (fibers conditions)
#:use-module (knots)
#:export (fibers-promise?
fibers-delay
fibers-force
fibers-promise-reset
fibers-promise-result-available?))
(define-record-type <fibers-promise>
(make-fibers-promise thunk values-box evaluated-condition)
fibers-promise?
(thunk fibers-promise-thunk)
(values-box fibers-promise-values-box)
(evaluated-condition fibers-promise-evaluated-condition))
(define (fibers-delay thunk)
(make-fibers-promise
thunk
(make-atomic-box #f)
(make-condition)))
(define (fibers-force fp)
(unless (fibers-promise? fp)
(raise-exception
(make-exception
(make-exception-with-message "fibers-force: not a fibers promise")
(make-exception-with-irritants fp))))
(let ((res (atomic-box-compare-and-swap!
(fibers-promise-values-box fp)
#f
'started)))
(cond
((eq? #f res)
(call-with-values
(lambda ()
(with-exception-handler
(lambda (exn)
(atomic-box-set! (fibers-promise-values-box fp)
exn)
(signal-condition!
(fibers-promise-evaluated-condition fp))
(raise-exception exn))
(lambda ()
(with-exception-handler
(lambda (exn)
(let ((stack
(match (fluid-ref %stacks)
((stack-tag . prompt-tag)
(make-stack #t
0 prompt-tag
0 (and prompt-tag 1)))
(_
(make-stack #t)))))
(raise-exception
(make-exception
exn
(make-knots-exception stack)))))
(fibers-promise-thunk fp)))
#:unwind? #t))
(lambda vals
(atomic-box-set! (fibers-promise-values-box fp)
vals)
(signal-condition!
(fibers-promise-evaluated-condition fp))
(apply values vals))))
((eq? res 'started)
(begin
(wait (fibers-promise-evaluated-condition fp))
(let ((result (atomic-box-ref (fibers-promise-values-box fp))))
(if (exception? result)
(raise-exception result)
(apply values result)))))
(else
(if (exception? res)
(raise-exception res)
(apply values res))))))
(define (fibers-promise-reset fp)
(atomic-box-set! (fibers-promise-values-box fp)
#f))
(define (fibers-promise-result-available? fp)
(let ((val (atomic-box-ref (fibers-promise-values-box fp))))
(not (or (eq? val #f)
(eq? val 'started)))))

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knots/queue.scm
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;;; Guile Knots
;;; Copyright © 2020 Christopher Baines <mail@cbaines.net>
;;;
;;; This file is part of Guile Knots.
;;;
;;; The Guile Knots 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 3 of the
;;; License, or (at your option) any later version.
;;;
;;; The Guile Knots 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 the guix-data-service. If not, see
;;; <http://www.gnu.org/licenses/>.
(define-module (knots queue)
#:use-module (ice-9 q)
#:use-module (fibers)
#:use-module (fibers channels)
#:use-module (fibers operations)
#:export (spawn-queueing-fiber))
(define (spawn-queueing-fiber dest-channel)
(define queue (make-q))
(let ((queue-channel (make-channel)))
(spawn-fiber
(lambda ()
(while #t
(if (q-empty? queue)
(enq! queue
(perform-operation
(get-operation queue-channel)))
(let ((front (q-front queue)))
(perform-operation
(choice-operation
(wrap-operation (get-operation queue-channel)
(lambda (val)
(enq! queue val)))
(wrap-operation (put-operation dest-channel front)
(lambda _
(q-pop! queue))))))))))
queue-channel))

1428
knots/resource-pool.scm
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524
knots/thread-pool.scm
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;;; Guile Knots
;;; Copyright © 2020 Christopher Baines <mail@cbaines.net>
;;;
;;; This file is part of Guile Knots.
;;;
;;; The Guile Knots 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 3 of the
;;; License, or (at your option) any later version.
;;;
;;; The Guile Knots 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 the guix-data-service. If not, see
;;; <http://www.gnu.org/licenses/>.
(define-module (knots thread-pool)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-9)
#:use-module (srfi srfi-19)
#:use-module (srfi srfi-71)
#:use-module (system foreign)
#:use-module (system base target)
#:use-module (rnrs bytevectors)
#:use-module (ice-9 q)
#:use-module (ice-9 match)
#:use-module (ice-9 atomic)
#:use-module (ice-9 threads)
#:use-module (fibers)
#:use-module (fibers timers)
#:use-module (fibers channels)
#:use-module (fibers operations)
#:use-module (knots)
#:use-module (knots resource-pool)
#:export (set-thread-name
thread-name
&thread-pool-timeout-error
thread-pool-timeout-error-pool
thread-pool-timeout-error?
make-thread-pool
thread-pool?
thread-pool-resource-pool
make-fixed-size-thread-pool
fixed-size-thread-pool?
fixed-size-thread-pool-channel
fixed-size-thread-pool-current-procedures
;; These procedures work for thread pools and fixed size
;; thread pools
thread-pool-arguments-parameter
thread-pool-default-checkout-timeout
destroy-thread-pool
call-with-thread))
(define* (syscall->procedure return-type name argument-types
#:key library)
"Return a procedure that wraps the C function NAME using the dynamic FFI,
and that returns two values: NAME's return value, and errno. When LIBRARY is
specified, look up NAME in that library rather than in the global symbol name
space.
If an error occurs while creating the binding, defer the error report until
the returned procedure is called."
(catch #t
(lambda ()
;; Note: When #:library is set, try it first and fall back to libc
;; proper. This is because libraries like libutil.so have been subsumed
;; by libc.so with glibc >= 2.34.
(let ((ptr (dynamic-func name
(if library
(or (false-if-exception
(dynamic-link library))
(dynamic-link))
(dynamic-link)))))
;; The #:return-errno? facility was introduced in Guile 2.0.12.
(pointer->procedure return-type ptr argument-types
#:return-errno? #t)))
(lambda args
(lambda _
(throw 'system-error name "~A" (list (strerror ENOSYS))
(list ENOSYS))))))
(define %prctl
;; Should it win the API contest against 'ioctl'? You tell us!
(syscall->procedure int "prctl"
(list int unsigned-long unsigned-long
unsigned-long unsigned-long)))
(define PR_SET_NAME 15) ;<linux/prctl.h>
(define PR_GET_NAME 16)
(define PR_SET_CHILD_SUBREAPER 36)
(define (set-child-subreaper!)
"Set the CHILD_SUBREAPER capability for the current process."
(%prctl PR_SET_CHILD_SUBREAPER 1 0 0 0))
(define %max-thread-name-length
;; Maximum length in bytes of the process name, including the terminating
;; zero.
16)
(define (set-thread-name!/linux name)
"Set the name of the calling thread to NAME. NAME is truncated to 15
bytes."
(let ((ptr (string->pointer name)))
(let ((ret
err
(%prctl PR_SET_NAME
(pointer-address ptr) 0 0 0)))
(unless (zero? ret)
(throw 'set-process-name "set-process-name"
"set-process-name: ~A"
(list (strerror err))
(list err))))))
(define (bytes->string bytes)
"Read BYTES, a list of bytes, and return the null-terminated string decoded
from there, or #f if that would be an empty string."
(match (take-while (negate zero?) bytes)
(()
#f)
(non-zero
(list->string (map integer->char non-zero)))))
(define (thread-name/linux)
"Return the name of the calling thread as a string."
(let ((buf (make-bytevector %max-thread-name-length)))
(let ((ret
err
(%prctl PR_GET_NAME
(pointer-address (bytevector->pointer buf))
0 0 0)))
(if (zero? ret)
(bytes->string (bytevector->u8-list buf))
(throw 'process-name "process-name"
"process-name: ~A"
(list (strerror err))
(list err))))))
(define set-thread-name
(if (string-contains %host-type "linux")
set-thread-name!/linux
(const #f)))
(define thread-name
(if (string-contains %host-type "linux")
thread-name/linux
(const "")))
(define-record-type <thread-pool>
(thread-pool resource-pool arguments-parameter)
thread-pool?
(resource-pool thread-pool-resource-pool)
(arguments-parameter thread-pool-arguments-parameter-accessor))
(define-record-type <fixed-size-thread-pool>
(fixed-size-thread-pool channel arguments-parameter current-procedures
default-checkout-timeout)
fixed-size-thread-pool?
(channel fixed-size-thread-pool-channel)
(arguments-parameter fixed-size-thread-pool-arguments-parameter)
(current-procedures fixed-size-thread-pool-current-procedures)
(default-checkout-timeout fixed-size-thread-pool-default-checkout-timeout))
;; Since both thread pool records have this field, use a procedure
;; than handles the appropriate accessor
(define (thread-pool-arguments-parameter pool)
(if (fixed-size-thread-pool? pool)
(fixed-size-thread-pool-arguments-parameter pool)
(thread-pool-arguments-parameter-accessor pool)))
(define (thread-pool-default-checkout-timeout pool)
(if (fixed-size-thread-pool? pool)
(fixed-size-thread-pool-default-checkout-timeout pool)
(assq-ref (resource-pool-configuration
(thread-pool-resource-pool pool))
'default-checkout-timeout)))
(define &thread-pool-timeout-error
(make-exception-type '&thread-pool-timeout-error
&error
'(pool)))
(define make-thread-pool-timeout-error
(record-constructor &thread-pool-timeout-error))
(define thread-pool-timeout-error-pool
(exception-accessor
&thread-pool-timeout-error
(record-accessor &thread-pool-timeout-error 'pool)))
(define thread-pool-timeout-error?
(exception-predicate &thread-pool-timeout-error))
(define* (make-fixed-size-thread-pool size
#:key
thread-initializer
thread-destructor
delay-logger
duration-logger
thread-lifetime
(expire-on-exception? #f)
(name "unnamed")
(use-default-io-waiters? #t)
default-checkout-timeout)
(define channel
(make-channel))
(define param
(make-parameter #f))
(define thread-proc-vector
(make-vector size #f))
(define (initializer/safe)
(let ((args
(with-exception-handler
(lambda _ #f)
(lambda ()
(with-exception-handler
(lambda (exn)
(simple-format
(current-error-port)
"exception running initializer in thread pool (~A): ~A\n"
name
thread-initializer)
(print-backtrace-and-exception/knots exn)
(raise-exception exn))
thread-initializer))
#:unwind? #t)))
(if args
args
;; never give up, just keep retrying
(begin
(sleep 1)
(initializer/safe)))))
(define (destructor/safe args)
(let ((success?
(with-exception-handler
(lambda _ #f)
(lambda ()
(with-exception-handler
(lambda (exn)
(simple-format
(current-error-port)
"exception running destructor in thread pool (~A): ~A\n"
name
thread-destructor)
(print-backtrace-and-exception/knots exn)
(raise-exception exn))
(lambda ()
(apply thread-destructor args)
#t)))
#:unwind? #t)))
(or success?
#t
(begin
(sleep 1)
(destructor/safe args)))))
(define (process channel args)
(let loop ()
(match (get-message channel)
('destroy #f)
((reply sent-time proc)
(when delay-logger
(let ((time-delay
(- (get-internal-real-time)
sent-time)))
(delay-logger (/ time-delay
internal-time-units-per-second)
proc)))
(let* ((start-time (get-internal-real-time))
(response
(with-exception-handler
(lambda (exn)
(list 'thread-pool-error
(/ (- (get-internal-real-time)
start-time)
internal-time-units-per-second)
exn))
(lambda ()
(with-exception-handler
(lambda (exn)
(let ((stack
(match (fluid-ref %stacks)
((stack-tag . prompt-tag)
(make-stack #t
0 prompt-tag
0 (and prompt-tag 1)))
(_
(make-stack #t)))))
(raise-exception
(make-exception
exn
(make-knots-exception stack)))))
(lambda ()
(call-with-values
(lambda ()
(start-stack
#t
(apply proc args)))
(lambda vals
(cons (/ (- (get-internal-real-time)
start-time)
internal-time-units-per-second)
vals))))))
#:unwind? #t)))
(put-message reply
response)
(let ((exception?
(match response
(('thread-pool-error duration _)
(when duration-logger
(duration-logger duration proc))
#t)
((duration . _)
(when duration-logger
(duration-logger duration proc))
#f))))
(if (and exception?
expire-on-exception?)
#t
(loop))))))))
(define (start-thread index channel)
(call-with-new-thread
(lambda ()
(catch 'system-error
(lambda ()
(set-thread-name
(string-append
name " w t " (number->string index))))
(const #t))
(let init ((args (if thread-initializer
(initializer/safe)
'())))
(let ((continue?
(with-exception-handler
(lambda (exn)
(simple-format
(current-error-port)
"knots: thread-pool: internal exception: ~A\n" exn))
(lambda ()
(parameterize ((param args))
(process channel args)))
#:unwind? #t)))
(when thread-destructor
(destructor/safe args))
(when continue?
(init (if thread-initializer
(initializer/safe)
'()))))))))
(for-each
(lambda (i)
(if use-default-io-waiters?
(call-with-default-io-waiters
(lambda ()
(start-thread i channel)))
(start-thread i channel)))
(iota size))
(fixed-size-thread-pool channel
param
thread-proc-vector
default-checkout-timeout))
(define* (make-thread-pool max-size
#:key
(min-size max-size)
scheduler
thread-initializer
thread-destructor
(delay-logger (lambda _ #f))
(duration-logger (const #f))
thread-lifetime
(expire-on-exception? #f)
(name "unnamed")
(use-default-io-waiters? #t)
default-checkout-timeout)
"Return a channel used to offload work to a dedicated thread. ARGS are the
arguments of the thread pool procedure."
(define param
(make-parameter #f))
(let ((resource-pool
(make-resource-pool
(lambda ()
(make-fixed-size-thread-pool
1
#:thread-initializer thread-initializer
#:thread-destructor thread-destructor
#:thread-lifetime thread-lifetime
#:expire-on-exception? expire-on-exception?
#:name name
#:use-default-io-waiters? use-default-io-waiters?))
max-size
#:destructor destroy-thread-pool
#:min-size min-size
#:delay-logger delay-logger
#:scheduler scheduler
#:duration-logger duration-logger
#:default-checkout-timeout default-checkout-timeout)))
(thread-pool resource-pool
param)))
(define* (call-with-thread thread-pool
proc
#:key
duration-logger
checkout-timeout
channel
destroy-thread-on-exception?
(max-waiters 'default))
"Send PROC to the thread pool through CHANNEL. Return the result of PROC.
If already in the thread pool, call PROC immediately."
(define (handle-proc fixed-size-thread-pool
reply-channel
start-time
timeout)
(let* ((request-channel
(or channel
(fixed-size-thread-pool-channel
fixed-size-thread-pool)))
(operation-success?
(perform-operation
(let ((put
(wrap-operation
(put-operation request-channel
(list reply-channel
start-time
proc))
(const #t))))
(if timeout
(choice-operation
put
(wrap-operation (sleep-operation timeout)
(const #f)))
put)))))
(unless operation-success?
(raise-exception
(make-thread-pool-timeout-error)))
(let ((reply (get-message reply-channel)))
(match reply
(('thread-pool-error duration exn)
(when duration-logger
(duration-logger duration))
(raise-exception exn))
((duration . result)
(when duration-logger
(duration-logger duration))
(apply values result))))))
(let ((args ((thread-pool-arguments-parameter thread-pool))))
(if args
(apply proc args)
(let ((start-time (get-internal-real-time))
(reply-channel (make-channel)))
(if (fixed-size-thread-pool? thread-pool)
(handle-proc thread-pool
reply-channel
start-time
checkout-timeout)
(with-exception-handler
(lambda (exn)
(if (and (resource-pool-timeout-error? exn)
(eq? (resource-pool-timeout-error-pool exn)
(thread-pool-resource-pool thread-pool)))
(raise-exception
(make-thread-pool-timeout-error thread-pool))
(raise-exception exn)))
(lambda ()
(call-with-resource-from-pool (thread-pool-resource-pool
thread-pool)
(lambda (fixed-size-thread-pool)
(if checkout-timeout
(let ((remaining-time
(/ (- (get-internal-real-time) start-time)
internal-time-units-per-second)))
(if (< remaining-time checkout-timeout)
(handle-proc fixed-size-thread-pool
reply-channel
start-time
remaining-time)
(raise-exception
(make-thread-pool-timeout-error thread-pool))))
(handle-proc fixed-size-thread-pool
reply-channel
start-time
#f)))
#:max-waiters max-waiters
#:timeout checkout-timeout
#:destroy-resource-on-exception?
destroy-thread-on-exception?))))))))
(define (destroy-thread-pool pool)
(if (fixed-size-thread-pool? pool)
(put-message
(fixed-size-thread-pool-channel pool)
'destroy)
(destroy-resource-pool
(thread-pool-resource-pool pool))))

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knots/timeout.scm
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@ -1,203 +0,0 @@
;;; Guile Knots
;;; Copyright © 2020 Christopher Baines <mail@cbaines.net>
;;;
;;; This file is part of Guile Knots.
;;;
;;; The Guile Knots 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 3 of the
;;; License, or (at your option) any later version.
;;;
;;; The Guile Knots 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 the guix-data-service. If not, see
;;; <http://www.gnu.org/licenses/>.
(define-module (knots timeout)
#:use-module (srfi srfi-71)
#:use-module (ice-9 match)
#:use-module (ice-9 atomic)
#:use-module (ice-9 exceptions)
#:use-module (ice-9 ports internal)
#:use-module (ice-9 suspendable-ports)
#:use-module (fibers)
#:use-module (fibers timers)
#:use-module (fibers channels)
#:use-module (fibers scheduler)
#:use-module (fibers operations)
#:export (with-fibers-timeout
wait-until-port-readable-operation
wait-until-port-writable-operation
&port-timeout-error
port-timeout-error?
&port-read-timeout-error
port-read-timeout-error?
&port-write-timeout-error
port-write-timeout-error?
with-port-timeouts))
(define* (with-fibers-timeout thunk #:key timeout on-timeout)
(let ((channel (make-channel)))
(spawn-fiber
(lambda ()
(with-exception-handler
(lambda (exn)
(perform-operation
(choice-operation
(put-operation channel (cons 'exception exn))
(sleep-operation timeout))))
(lambda ()
(call-with-values thunk
(lambda vals
(perform-operation
(choice-operation
(put-operation channel vals)
(sleep-operation timeout))))))
#:unwind? #t)))
(match (perform-operation
(choice-operation
(get-operation channel)
(wrap-operation (sleep-operation timeout)
(const 'timeout))))
('timeout
(on-timeout))
(('exception . exn)
(raise-exception exn))
(vals
(apply values vals)))))
(define &port-timeout-error
(make-exception-type '&port-timeout-error
&external-error
'(thunk port)))
(define make-port-timeout-error
(record-constructor &port-timeout-error))
(define port-timeout-error?
(exception-predicate &port-timeout-error))
(define &port-read-timeout-error
(make-exception-type '&port-read-timeout-error
&port-timeout-error
'()))
(define make-port-read-timeout-error
(record-constructor &port-read-timeout-error))
(define port-read-timeout-error?
(exception-predicate &port-read-timeout-error))
(define &port-write-timeout-error
(make-exception-type '&port-write-timeout-error
&port-timeout-error
'()))
(define make-port-write-timeout-error
(record-constructor &port-write-timeout-error))
(define port-write-timeout-error?
(exception-predicate &port-write-timeout-error))
(define (readable? port)
"Test if PORT is writable."
(= 1 (port-poll port "r" 0)))
(define (writable? port)
"Test if PORT is writable."
(= 1 (port-poll port "w" 0)))
(define (make-wait-operation ready? schedule-when-ready port
port-ready-fd this-procedure)
(make-base-operation #f
(lambda _
(and (ready? port) values))
(lambda (flag sched resume)
(define (commit)
(match (atomic-box-compare-and-swap! flag 'W 'S)
('W (resume values))
('C (commit))
('S #f)))
(schedule-when-ready
sched (port-ready-fd port) commit))))
(define (wait-until-port-readable-operation port)
"Make an operation that will succeed when PORT is readable."
(unless (input-port? port)
(error "refusing to wait forever for input on non-input port"))
(make-wait-operation readable? schedule-task-when-fd-readable port
port-read-wait-fd
wait-until-port-readable-operation))
(define (wait-until-port-writable-operation port)
"Make an operation that will succeed when PORT is writable."
(unless (output-port? port)
(error "refusing to wait forever for output on non-output port"))
(make-wait-operation writable? schedule-task-when-fd-writable port
port-write-wait-fd
wait-until-port-writable-operation))
(define* (with-port-timeouts thunk
#:key timeout
(read-timeout timeout)
(write-timeout timeout))
(define (no-fibers-wait thunk port mode timeout)
(define poll-timeout-ms 200)
;; When the GC runs, it restarts the poll syscall, but the timeout
;; remains unchanged! When the timeout is longer than the time
;; between the syscall restarting, I think this renders the
;; timeout useless. Therefore, this code uses a short timeout, and
;; repeatedly calls poll while watching the clock to see if it has
;; timed out overall.
(let ((timeout-internal
(+ (get-internal-real-time)
(* internal-time-units-per-second timeout))))
(let loop ((poll-value
(port-poll port mode poll-timeout-ms)))
(if (= poll-value 0)
(if (> (get-internal-real-time)
timeout-internal)
(raise-exception
(if (string=? mode "r")
(make-port-read-timeout-error thunk port)
(make-port-write-timeout-error thunk port)))
(loop (port-poll port mode poll-timeout-ms)))
poll-value))))
(parameterize
((current-read-waiter
(lambda (port)
(if (current-scheduler)
(perform-operation
(choice-operation
(wait-until-port-readable-operation port)
(wrap-operation
(sleep-operation read-timeout)
(lambda ()
(raise-exception
(make-port-read-timeout-error thunk port))))))
(no-fibers-wait thunk port "r" read-timeout))))
(current-write-waiter
(lambda (port)
(if (current-scheduler)
(perform-operation
(choice-operation
(wait-until-port-writable-operation port)
(wrap-operation
(sleep-operation write-timeout)
(lambda ()
(raise-exception
(make-port-write-timeout-error thunk port))))))
(no-fibers-wait thunk port "w" write-timeout)))))
(thunk)))

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knots/web-server.scm
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@ -1,588 +0,0 @@
;;; Guile Knots
;;; Copyright © 2020 Christopher Baines <mail@cbaines.net>
;;; Copyright (C) 2010-2013,2015,2017 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 program. If not, see <http://www.gnu.org/licenses/>.
(define-module (knots web-server)
#:use-module (srfi srfi-9)
#:use-module (srfi srfi-71)
#:use-module (ice-9 control)
#:use-module (fibers)
#:use-module (fibers timers)
#:use-module (fibers operations)
#:use-module (fibers conditions)
#:use-module (rnrs bytevectors)
#:use-module (ice-9 binary-ports)
#:use-module (ice-9 textual-ports)
#:use-module (ice-9 iconv)
#:use-module (ice-9 match)
#:use-module (ice-9 exceptions)
#:use-module ((srfi srfi-9 gnu) #:select (set-field))
#:use-module (system repl error-handling)
#:use-module (web uri)
#:use-module (web http)
#:use-module (web request)
#:use-module (web response)
#:use-module (knots)
#:use-module (knots timeout)
#:use-module (knots non-blocking)
#:export (run-knots-web-server
make-chunked-output-port/knots
&request-body-ended-prematurely
request-body-ended-prematurely-error?
sanitize-response
request-body-port/knots
read-request-body/knots
default-write-response-exception-handler
web-server?
web-server-socket
web-server-port))
(define (make-default-socket family addr port)
(let ((sock (socket PF_INET SOCK_STREAM 0)))
(setsockopt sock SOL_SOCKET SO_REUSEADDR 1)
(fcntl sock F_SETFD FD_CLOEXEC)
(bind sock family addr port)
sock))
(define crlf-bv
(string->utf8 "\r\n"))
(define (chunked-output-port-overhead-bytes write-size)
(+ (string-length (number->string write-size 16))
(bytevector-length crlf-bv)
(bytevector-length crlf-bv)))
(define* (make-chunked-output-port/knots port #:key (keep-alive? #f)
(buffering 1200))
"Returns a new port which translates non-encoded data into a HTTP
chunked transfer encoded data and writes this to PORT. Data written to
this port is buffered until the port is flushed, at which point it is
all sent as one chunk. The port will otherwise be flushed every
BUFFERING bytes, which defaults to 1200. Take care to close the port
when done, as it will output the remaining data, and encode the final
zero chunk. When the port is closed it will also close PORT, unless
KEEP-ALIVE? is true."
(define (write! bv start count)
(let ((len-string
(number->string count 16)))
(put-string port len-string))
(put-bytevector port crlf-bv 0 2)
(put-bytevector port bv start count)
(put-bytevector port crlf-bv 0 2)
(force-output port)
count)
(define (close)
(put-string port "0\r\n\r\n")
(force-output port)
(unless keep-alive?
(close-port port)))
(define ret
(make-custom-binary-output-port "chunked http" write! #f #f close))
(setvbuf ret 'block buffering)
ret)
(define* (make-delimited-input-port port len fail
#:key (keep-alive? #t))
"Return an input port that reads from PORT, and makes sure that
exactly LEN bytes are available from PORT. Closing the returned port
closes PORT, unless KEEP-ALIVE? is true."
(define bytes-read 0)
(define (read! bv start count)
(let ((count (min count (- len bytes-read))))
(let loop ((ret (get-bytevector-n! port bv start count)))
(cond ((eof-object? ret)
(if (= bytes-read len)
0 ; EOF
(fail bytes-read)))
((and (zero? ret) (> count 0))
;; Do not return zero since zero means EOF, so try again.
(loop (get-bytevector-n! port bv start count)))
(else
(set! bytes-read (+ bytes-read ret))
ret)))))
(define close
(and (not keep-alive?)
(lambda ()
(close-port port))))
(make-custom-binary-input-port "delimited input port" read! #f #f close))
;; Chunked Responses
(define &request-body-ended-prematurely
(make-exception-type '&request-body-ended-prematurely
&external-error
'(bytes-read)))
(define make-request-body-ended-prematurely-error
(record-constructor &request-body-ended-prematurely))
(define request-body-ended-prematurely-error?
(exception-predicate &request-body-ended-prematurely))
(define (request-body-port/knots r)
(cond
((member '(chunked) (request-transfer-encoding r))
(make-chunked-input-port (request-port r)
#:keep-alive? #t))
(else
(let ((content-length
(request-content-length r)))
(make-delimited-input-port
(request-port r)
content-length
(lambda (bytes-read)
(raise-exception
(make-request-body-ended-prematurely-error bytes-read))))))))
(define (read-request-body/knots r)
(cond
((member '(chunked) (request-transfer-encoding r))
(get-bytevector-all
(request-body-port/knots r)))
(else
(let ((content-length
(request-content-length r)))
(if content-length
(get-bytevector-n
(request-body-port/knots r)
content-length)
#f)))))
(define (extend-response r k v . additional)
(define (extend-alist alist k v)
(let ((pair (assq k alist)))
(acons k v (if pair (delq pair alist) alist))))
(let ((r (set-field r (response-headers)
(extend-alist (response-headers r) k v))))
(if (null? additional)
r
(apply extend-response r additional))))
(define (response-maybe-add-connection-header-value request response)
(if (memq 'close (response-connection response))
;; Nothing to do
response
(let* ((v (request-version request))
(add-close-header?
(case (car v)
((1)
(case (cdr v)
((1) (memq 'close (request-connection request)))
((0) (not (memq 'keep-alive (request-connection request))))))
(else #t))))
(if add-close-header?
(extend-response response 'connection '(close))
(if (and (= 1 (car v))
(= 0 (cdr v)))
(extend-response response 'connection '(keep-alive))
response)))))
;; -> response body
(define (sanitize-response request response body)
"\"Sanitize\" the given response and body, making them appropriate for
the given request.
As a convenience to web handler authors, RESPONSE may be given as
an alist of headers, in which case it is used to construct a default
response. Ensures that the response version corresponds to the request
version. If BODY is a string, encodes the string to a bytevector,
in an encoding appropriate for RESPONSE. Adds a
‘content-length’ and ‘content-type’ header, as necessary.
If BODY is a procedure, it is called with a port as an argument,
and the output collected as a bytevector. In the future we might try to
instead use a compressing, chunk-encoded port, and call this procedure
later, in the write-client procedure. Authors are advised not to rely
on the procedure being called at any particular time."
(cond
((list? response)
(sanitize-response request
(build-response #:version (request-version request)
#:headers response)
body))
((not (equal? (request-version request) (response-version response)))
(sanitize-response request
(adapt-response-version response
(request-version request))
body))
((not body)
(values response #vu8()))
((string? body)
(let* ((type (response-content-type response
'(text/plain)))
(declared-charset (assq-ref (cdr type) 'charset))
(charset (or declared-charset "utf-8")))
(sanitize-response
request
(if declared-charset
response
(extend-response response 'content-type
`(,@type (charset . ,charset))))
(string->bytevector body charset))))
((not (or (bytevector? body)
(procedure? body)))
(raise-exception
(make-exception-with-irritants
(list (make-exception-with-message
"unexpected body type")
body))))
((and (response-must-not-include-body? response)
body
;; FIXME make this stricter: even an empty body should be prohibited.
(not (zero? (bytevector-length body))))
(raise-exception
(make-exception-with-irritants
(list (make-exception-with-message
"response with this status code must not include body")
response))))
(else
;; check length; assert type; add other required fields?
(values (response-maybe-add-connection-header-value
request
(if (procedure? body)
(if (response-content-length response)
response
(extend-response response
'transfer-encoding
'((chunked))))
(let ((rlen (response-content-length response))
(blen (bytevector-length body)))
(cond
(rlen (if (= rlen blen)
response
(error "bad content-length" rlen blen)))
(else (extend-response response 'content-length blen))))))
(if (eq? (request-method request) 'HEAD)
(raise-exception
(make-exception-with-irritants
(list (make-exception-with-message
"unexpected body type")
body)))
body)))))
(define (with-stack-and-prompt thunk)
(call-with-prompt (default-prompt-tag)
(lambda () (start-stack #t (thunk)))
(lambda (k proc)
(with-stack-and-prompt (lambda () (proc k))))))
(define (keep-alive? response)
(not (memq 'close (response-connection response))))
(define (default-read-request-exception-handler exn)
(display "While reading request:\n" (current-error-port))
(print-exception
(current-error-port)
#f
'%exception
(list exn))
#f)
(define (default-write-response-exception-handler exn request)
(if (and (exception-with-origin? exn)
(string=? (exception-origin exn)
"fport_write"))
(simple-format
(current-error-port)
"~A ~A: error replying to client\n"
(request-method request)
(uri-path (request-uri request)))
(simple-format
(current-error-port)
"knots web server: ~A ~A: exception replying to client: ~A\n"
(request-method request)
(uri-path (request-uri request))
exn))
;; Close the client port
#f)
(define (exception-handler exn request)
(let* ((error-string
(call-with-output-string
(lambda (port)
(simple-format
port
"exception when processing: ~A ~A\n"
(request-method request)
(uri-path (request-uri request)))
(print-backtrace-and-exception/knots
exn
#:port port)))))
(display error-string
(current-error-port)))
(values (build-response #:code 500)
;; TODO Make this configurable
(string->utf8
"internal server error")))
(define* (handle-request handler client
read-request-exception-handler
write-response-exception-handler
buffer-size
#:key post-request-hook)
(let ((request
(with-exception-handler
read-request-exception-handler
(lambda ()
(read-request client))
#:unwind? #t))
(read-request-time
(get-internal-real-time)))
(let ((response
body
(cond
((not request)
;; Bad request.
(values (build-response
#:version '(1 . 0)
#:code 400
#:headers '((content-length . 0)
(connection . (close))))
#vu8()))
(else
(call-with-escape-continuation
(lambda (return)
(with-exception-handler
(lambda (exn)
(call-with-values
(lambda ()
(exception-handler exn request))
(lambda (response body)
(call-with-values
(lambda ()
(sanitize-response request response body))
return))))
(lambda ()
(start-stack
#t
(call-with-values
(lambda ()
(handler request))
(match-lambda*
((response body)
(sanitize-response request response body))
(other
(raise-exception
(make-exception-with-irritants
(list (make-exception-with-message
(simple-format
#f
"wrong number of values returned from handler, expecting 2, got ~A"
(length other)))
handler)))))))))))))))
(with-exception-handler
(lambda (exn)
(write-response-exception-handler exn request))
(lambda ()
(write-response response client)
(let ((response-start-time
(get-internal-real-time))
(body-written?
(if (procedure? body)
(let* ((type (response-content-type response
'(text/plain)))
(declared-charset (assq-ref (cdr type) 'charset))
(charset (or declared-charset "ISO-8859-1"))
(body-port
(if (response-content-length response)
client
(make-chunked-output-port/knots
client
#:keep-alive? #t
#:buffering
(- buffer-size
(chunked-output-port-overhead-bytes
buffer-size))))))
(set-port-encoding! body-port charset)
(let ((body-written?
(with-exception-handler
(lambda (exn)
#f)
(lambda ()
(with-exception-handler
(lambda (exn)
(print-backtrace-and-exception/knots exn)
(raise-exception exn))
(lambda ()
(body body-port)))
#t)
#:unwind? #t)))
(unless (response-content-length response)
(close-port body-port))
body-written?))
(begin
(put-bytevector client body)
#t))))
(if body-written?
(begin
(force-output client)
(when post-request-hook
(post-request-hook request
#:read-request-time read-request-time
#:response-start-time response-start-time
#:response-end-time (get-internal-real-time)))
(when (and (procedure? body)
(response-content-length response))
(set-port-encoding! client "ISO-8859-1"))
(keep-alive? response))
#f)))
#:unwind? #t))))
(define* (client-loop client handler
read-request-exception-handler
write-response-exception-handler
connection-idle-timeout
buffer-size
post-request-hook)
;; Always disable Nagle's algorithm, as we handle buffering
;; ourselves; when we force-output, we really want the data to go
;; out.
(setvbuf client 'block buffer-size)
(setsockopt client IPPROTO_TCP TCP_NODELAY 1)
(let loop ()
(cond
((with-exception-handler
(lambda (exn)
(unless (and (exception-with-origin? exn)
(string=? (exception-origin exn)
"fport_read"))
(display "knots web-server, exception in client loop:\n"
(current-error-port))
(print-exception
(current-error-port)
#f
'%exception
(list exn)))
#t)
(lambda ()
(or
(if (eq? #f connection-idle-timeout)
#f
(perform-operation
(choice-operation (wrap-operation
(wait-until-port-readable-operation client)
(const #f))
(wrap-operation
(sleep-operation connection-idle-timeout)
(const #t)))))
(eof-object? (lookahead-u8 client))))
#:unwind? #t)
(close-port client))
(else
(let ((keep-alive? (handle-request handler client
read-request-exception-handler
write-response-exception-handler
buffer-size
#:post-request-hook
post-request-hook)))
(if keep-alive?
(loop)
(close-port client)))))))
(define (post-request-hook/safe post-request-hook)
(if post-request-hook
(lambda args
(with-exception-handler
(lambda (exn) #f)
(lambda ()
(with-exception-handler
(lambda (exn)
(print-backtrace-and-exception/knots exn)
(raise-exception exn))
(lambda ()
(apply post-request-hook args))))
#:unwind? #t))
#f))
(define-record-type <web-server>
(make-web-server socket port)
web-server?
(socket web-server-socket)
(port web-server-port))
(define* (run-knots-web-server handler #:key
(host #f)
(family AF_INET)
(addr (if host
(inet-pton family host)
INADDR_LOOPBACK))
(port 8080)
(socket (make-default-socket family addr port))
(read-request-exception-handler
default-read-request-exception-handler)
(write-response-exception-handler
default-write-response-exception-handler)
(connection-idle-timeout #f)
(connection-buffer-size 1024)
post-request-hook)
"Run the knots web server.
HANDLER should be a procedure that takes one argument, the HTTP
request and returns two values, the response and response body.
For example, here is a simple \"Hello, World!\" server:
@example
(define (handler request)
(let ((body (read-request-body request)))
(values '((content-type . (text/plain)))
\"Hello, World!\")))
(run-knots-web-server handler)
@end example
The response and body will be run through ‘sanitize-response’
before sending back to the client."
(non-blocking-port socket)
;; We use a large backlog by default. If the server is suddenly hit
;; with a number of connections on a small backlog, clients won't
;; receive confirmation for their SYN, leading them to retry --
;; probably successfully, but with a large latency.
(listen socket 1024)
(sigaction SIGPIPE SIG_IGN)
(spawn-fiber
(lambda ()
(let loop ()
(match (accept socket (logior SOCK_NONBLOCK SOCK_CLOEXEC))
((client . sockaddr)
(spawn-fiber (lambda ()
(client-loop client handler
read-request-exception-handler
write-response-exception-handler
connection-idle-timeout
connection-buffer-size
(post-request-hook/safe
post-request-hook)))
#:parallel? #t)
(loop))))))
(make-web-server socket
(vector-ref (getsockname socket)
2))) ; Not sure what this structure is

13
pre-inst-env.in
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@ -1,13 +0,0 @@
#!/bin/sh
abs_top_srcdir="`cd "@abs_top_srcdir@" > /dev/null; pwd`"
abs_top_builddir="`cd "@abs_top_builddir@" > /dev/null; pwd`"
GUILE_LOAD_COMPILED_PATH="$abs_top_builddir${GUILE_LOAD_COMPILED_PATH:+:}$GUILE_LOAD_COMPILED_PATH"
GUILE_LOAD_PATH="$abs_top_builddir:$abs_top_srcdir${GUILE_LOAD_PATH:+:}:$GUILE_LOAD_PATH"
export GUILE_LOAD_COMPILED_PATH GUILE_LOAD_PATH
PATH="$abs_top_builddir:$PATH"
export PATH
exec "$@"

13
test-env.in
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@ -1,13 +0,0 @@
#!/bin/sh
abs_top_srcdir="`cd "@abs_top_srcdir@" > /dev/null; pwd`"
abs_top_builddir="`cd "@abs_top_builddir@" > /dev/null; pwd`"
GUILE_LOAD_COMPILED_PATH="${abs_top_builddir}/tests${GUILE_LOAD_COMPILED_PATH:+:}$abs_top_builddir${GUILE_LOAD_COMPILED_PATH:+:}$GUILE_LOAD_COMPILED_PATH"
GUILE_LOAD_PATH="$abs_top_builddir/tests:$abs_top_srcdir${GUILE_LOAD_PATH:+:}$abs_top_builddir:$abs_top_srcdir${GUILE_LOAD_PATH:+:}:$GUILE_LOAD_PATH"
export GUILE_LOAD_COMPILED_PATH GUILE_LOAD_PATH
PATH="$abs_top_builddir:$PATH"
export PATH
exec "$@"

33
tests.scm
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@ -1,33 +0,0 @@
(define-module (tests)
#:use-module (ice-9 exceptions)
#:use-module (fibers)
#:use-module (knots)
#:export (run-fibers-for-tests
assert-no-heap-growth))
(define* (run-fibers-for-tests thunk #:key (drain? #t))
(let ((result
(run-fibers
(lambda ()
(with-exception-handler
(lambda (exn)
exn)
(lambda ()
(simple-format #t "running ~A\n" thunk)
(with-exception-handler
(lambda (exn)
(print-backtrace-and-exception/knots exn)
(raise-exception exn))
(lambda ()
(start-stack #t (thunk))))
#t)
#:unwind? #t))
#:hz 0
#:parallelism 1
#:drain? drain?)))
(if (exception? result)
(raise-exception result)
result)))
(define (assert-no-heap-growth thunk)
(thunk))

31
tests/non-blocking.scm
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@ -1,31 +0,0 @@
(use-modules (tests)
(fibers)
(unit-test)
(web uri)
(web client)
(web response)
(knots web-server)
(knots non-blocking))
(run-fibers-for-tests
(lambda ()
(let* ((web-server
(run-knots-web-server
(lambda (request)
(values '((content-type . (text/plain)))
"Hello, World!"))
#:port 0)) ;; Bind to any port
(port
(web-server-port web-server))
(uri
(build-uri 'http #:host "127.0.0.1" #:port port)))
(assert-equal
200
(response-code
(http-get
uri
#:port (non-blocking-open-socket-for-uri uri)))))))
(display "non-blocking test finished successfully\n")

144
tests/parallelism.scm
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@ -1,144 +0,0 @@
(use-modules (tests)
(fibers)
(unit-test)
(ice-9 exceptions)
(knots parallelism))
;; Test fibers-map
(run-fibers-for-tests
(lambda ()
(assert-equal
1122
(apply + (fibers-map
(lambda (i)
(* 2 i))
(iota 34))))))
;; Test fibers-batch-map with a large batch size
(run-fibers-for-tests
(lambda ()
(assert-equal
1122
(apply + (fibers-batch-map
(lambda (i)
(* 2 i))
100
(iota 34))))))
;; Test fibers-map with an empty list
(run-fibers-for-tests
(lambda ()
(fibers-map identity '())))
;; Test fibers-map with an empty vector
(run-fibers-for-tests
(lambda ()
(fibers-map identity #())))
;; Test fibers-map with vectors
(run-fibers-for-tests
(lambda ()
(assert-equal
1122
(apply + (vector->list
(fibers-map
(lambda (i)
(* 2 i))
(list->vector (iota 34))))))))
;; Test fibers-for-each
(run-fibers-for-tests
(lambda ()
(fibers-for-each
(lambda (i)
(* 2 i))
(iota 34))))
;; Test fibers-map-with-progress with an empty list
(run-fibers-for-tests
(lambda ()
(fibers-map-with-progress
identity
'(()))))
(run-fibers-for-tests
(lambda ()
(with-exception-handler
(lambda (exn)
(unless (and (exception-with-message? exn)
(string=? (exception-message exn)
"foo"))
(raise-exception exn)))
(lambda ()
(fibers-map-with-progress
(lambda _
(raise-exception
(make-exception-with-message "foo")))
'((1)))
(error 'should-not-reach-here))
#:unwind? #t)))
(run-fibers-for-tests
(lambda ()
(with-exception-handler
(lambda (exn)
(unless (and (exception-with-message? exn)
(string=? (exception-message exn)
"foo"))
(raise-exception exn)))
(lambda ()
(fibers-for-each
(lambda (i)
(raise-exception
(make-exception-with-message "foo")))
(iota 2)))
#:unwind? #t)))
(run-fibers-for-tests
(lambda ()
(with-exception-handler
(lambda (exn)
(unless (and (exception-with-message? exn)
(string=? (exception-message exn)
"foo"))
(raise-exception exn)))
(lambda ()
((fiberize
(lambda (i)
(raise-exception
(make-exception-with-message "foo"))))
1))
#:unwind? #t)))
(run-fibers-for-tests
(lambda ()
(let ((a 0))
(call-with-values
(lambda ()
(fibers-parallel
(begin
(sleep 1)
1)
(begin
(set! a 1)
2)))
(lambda (a b)
(assert-equal a 1)
(assert-equal b 2)))
(assert-equal a 1))))
(run-fibers-for-tests
(lambda ()
(let ((parallelism-limiter (make-parallelism-limiter 2)))
(fibers-for-each
(lambda _
(with-parallelism-limiter
parallelism-limiter
#f))
(iota 50))
(destroy-parallelism-limiter parallelism-limiter))))
(display "parallelism test finished successfully\n")

28
tests/promise.scm
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(use-modules (tests)
(fibers)
(unit-test)
(knots parallelism)
(knots promise))
(run-fibers-for-tests
(lambda ()
(let ((promises
(map (lambda (i)
(fibers-delay
(lambda ()
(* i 2))))
(iota 10))))
(assert-equal
#f
(fibers-promise-result-available? (car promises)))
(assert-equal
90
(apply + (fibers-map fibers-force promises)))
(assert-equal
#t
(fibers-promise-result-available? (car promises))))))
(display "promise test finished successfully\n")

22
tests/queue.scm
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@ -1,22 +0,0 @@
(use-modules (tests)
(fibers)
(fibers channels)
(unit-test)
(knots queue))
(run-fibers-for-tests
(lambda ()
(let* ((dest-channel
(make-channel))
(queue-channel
(spawn-queueing-fiber dest-channel)))
(put-message queue-channel 1)
(put-message queue-channel 2)
(put-message queue-channel 3)
(assert-equal 1 (get-message dest-channel))
(assert-equal 2 (get-message dest-channel))
(assert-equal 3 (get-message dest-channel)))))
(display "queue test finished successfully\n")

214
tests/resource-pool.scm
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@ -1,214 +0,0 @@
(use-modules (tests)
(fibers)
(unit-test)
(knots parallelism)
(knots resource-pool))
(define new-number
(let ((val 0))
(lambda ()
(set! val (1+ val))
val)))
(run-fibers-for-tests
(lambda ()
(let ((resource-pool (make-resource-pool
new-number
1)))
(assert-true
(number?
(with-resource-from-pool resource-pool
res
res)))
(destroy-resource-pool resource-pool))))
(run-fibers-for-tests
(lambda ()
(let ((resource-pool (make-fixed-size-resource-pool
(list 1))))
(assert-true
(number?
(with-resource-from-pool resource-pool
res
res)))
(destroy-resource-pool resource-pool))))
(run-fibers-for-tests
(lambda ()
(let ((resource-pool (make-resource-pool
new-number
1
#:add-resources-parallelism 1)))
(assert-true
(number?
(with-resource-from-pool resource-pool
res
res)))
(destroy-resource-pool resource-pool))))
(let* ((error-constructor
(record-constructor &resource-pool-timeout))
(err
(error-constructor 'foo)))
(assert-equal
(resource-pool-timeout-error-pool err)
'foo))
(run-fibers-for-tests
(lambda ()
(let ((resource-pool (make-resource-pool
new-number
2)))
(fibers-for-each
(lambda _
(with-resource-from-pool resource-pool
res
res))
(iota 20))
(destroy-resource-pool resource-pool))))
(run-fibers-for-tests
(lambda ()
(let ((resource-pool (make-resource-pool
new-number
2
#:destructor
(lambda (res)
#t))))
(fibers-for-each
(lambda _
(with-resource-from-pool resource-pool
res
res))
(iota 20))
(destroy-resource-pool resource-pool))))
(run-fibers-for-tests
(lambda ()
(let ((resource-pool (make-resource-pool
new-number
2
#:idle-seconds 0.5
#:destructor
(lambda (res)
#t))))
(fibers-for-each
(lambda _
(with-resource-from-pool resource-pool
res
res))
(iota 20))
(let loop ((stats (resource-pool-stats resource-pool
#:timeout #f)))
(unless (= 0 (assq-ref stats 'resources))
(sleep 0.1)
(loop (resource-pool-stats resource-pool #:timeout #f))))
(destroy-resource-pool resource-pool))))
(run-fibers-for-tests
(lambda ()
(let* ((counter 0)
(resource-pool (make-resource-pool
(lambda ()
(let ((start-val counter))
(sleep 0.05)
(if (= start-val counter)
(set! counter (+ 1 counter))
(error "collision detected")))
(new-number))
1)))
(fibers-batch-for-each
(lambda _
(with-resource-from-pool
resource-pool res
(let ((start-val counter))
(sleep 0.05)
(if (= start-val counter)
(set! counter (+ 1 counter))
(error "collision detected")))))
20
(iota 50))
(destroy-resource-pool resource-pool))))
(run-fibers-for-tests
(lambda ()
(let* ((counter 0)
(resource-pool (make-resource-pool
(lambda ()
(let ((start-val counter))
(sleep 0.05)
(if (= start-val counter)
(set! counter (+ 1 counter))
(error "collision detected")))
(new-number))
1
#:default-checkout-timeout 5)))
(fibers-batch-for-each
(lambda _
(with-resource-from-pool
resource-pool res
(let ((start-val counter))
(sleep 0.05)
(if (= start-val counter)
(set! counter (+ 1 counter))
(error "collision detected")))))
20
(iota 50))
(destroy-resource-pool resource-pool))))
(run-fibers-for-tests
(lambda ()
(let ((resource-pool (make-resource-pool
(lambda () #f)
1
#:default-max-waiters 1)))
(call-with-resource-from-pool
resource-pool
(lambda (res)
;; 1st waiter
(spawn-fiber
(lambda ()
(with-exception-handler
(lambda (exn)
(if (resource-pool-destroyed-error? exn)
#t
(raise-exception exn)))
(lambda ()
(call-with-resource-from-pool
resource-pool
(lambda (res)
#f)))
#:unwind? #t)))
(while (= 0
(assq-ref
(resource-pool-stats resource-pool #:timeout #f)
'waiters))
(sleep 0.1))
(with-exception-handler
(lambda (exn)
(if (resource-pool-too-many-waiters-error? exn)
#t
(raise-exception exn)))
(lambda ()
;; 2nd waiter
(call-with-resource-from-pool
resource-pool
(lambda (res)
(error 'should-not-be-reached))))
#:unwind? #t)))
(destroy-resource-pool resource-pool))))
(display "resource-pool test finished successfully\n")

88
tests/thread-pool.scm
View file

@ -1,88 +0,0 @@
(use-modules (tests)
(srfi srfi-71)
(fibers)
(unit-test)
(knots)
(knots thread-pool))
(let ((thread-pool
(make-fixed-size-thread-pool 2)))
(assert-equal
(call-with-thread
thread-pool
(lambda ()
4))
4))
(let ((thread-pool
(make-fixed-size-thread-pool
2
#:thread-initializer (const '(2)))))
(assert-equal
(call-with-thread
thread-pool
(lambda (num)
(* 2 num)))
4))
(let ((thread-pool
(make-fixed-size-thread-pool 2)))
(assert-equal
#t
(with-exception-handler
(lambda (exn)
(knots-exception? exn))
(lambda ()
(call-with-thread
thread-pool
(lambda ()
(+ 1 'a))))
#:unwind? #t)))
(run-fibers-for-tests
(lambda ()
(let ((thread-pool
(make-thread-pool 2)))
(assert-equal
(call-with-thread
thread-pool
(lambda ()
4))
4))))
(run-fibers-for-tests
(lambda ()
(let ((thread-pool
(make-thread-pool
2
#:thread-initializer (const '(2)))))
(assert-equal
(call-with-thread
thread-pool
(lambda (num)
(* 2 num)))
4))))
(run-fibers-for-tests
(lambda ()
(let ((thread-pool
(make-thread-pool 2)))
(assert-equal
#t
(with-exception-handler
(lambda (exn)
(knots-exception? exn))
(lambda ()
(call-with-thread
thread-pool
(lambda ()
(+ 1 'a))))
#:unwind? #t)))))
(display "thread-pool test finished successfully\n")

22
tests/timeout.scm
View file

@ -1,22 +0,0 @@
(use-modules (tests)
(fibers)
(unit-test)
(knots timeout))
(run-fibers-for-tests
(lambda ()
(assert-equal
1
(with-fibers-timeout
(const 1)
#:timeout 10))
(assert-equal
2
(with-fibers-timeout
(lambda ()
(sleep 10))
#:timeout 0.1
#:on-timeout (const 2)))))
(display "timeout test finished successfully\n")

236
tests/web-server.scm
View file

@ -1,236 +0,0 @@
(use-modules (srfi srfi-71)
(rnrs bytevectors)
(ice-9 binary-ports)
(ice-9 textual-ports)
(tests)
(fibers)
(fibers channels)
(unit-test)
(web uri)
(web client)
(web request)
(web response)
(knots web-server)
(knots non-blocking))
(run-fibers-for-tests
(lambda ()
(let* ((web-server
(run-knots-web-server
(lambda (request)
(values '((content-type . (text/plain)))
"Hello, World!"))
#:port 0)) ;; Bind to any port
(port
(web-server-port web-server))
(uri
(build-uri 'http #:host "127.0.0.1" #:port port)))
(assert-equal
200
(response-code
(http-get
uri
#:port (non-blocking-open-socket-for-uri uri)))))))
(run-fibers-for-tests
(lambda ()
(let* ((web-server
(run-knots-web-server
(lambda (request)
"Hello, World!")
#:port 0)) ;; Bind to any port
(port
(web-server-port web-server))
(uri
(build-uri 'http #:host "127.0.0.1" #:port port)))
(assert-equal
500
(response-code
(http-get
uri
#:port (non-blocking-open-socket-for-uri uri)))))))
(run-fibers-for-tests
(lambda ()
(let* ((web-server
(run-knots-web-server
(lambda (request)
(values '((content-type . (text/plain))
(content-length . 3))
(lambda (port)
(display "foo" port))))
#:port 0)) ;; Bind to any port
(port
(web-server-port web-server))
(uri
(build-uri 'http #:host "127.0.0.1" #:port port)))
(let ((response
body
(http-get
uri
#:port (non-blocking-open-socket-for-uri uri))))
(assert-equal
"foo"
body)))))
(run-fibers-for-tests
(lambda ()
(let* ((web-server
(run-knots-web-server
(lambda (request)
(values '((content-type . (text/plain
(charset . "utf-8"))))
(lambda (port)
(display "☺" port))))
#:port 0)) ;; Bind to any port
(port
(web-server-port web-server))
(uri
(build-uri 'http #:host "127.0.0.1" #:port port)))
(let ((response
body
(http-get
uri
#:port (non-blocking-open-socket-for-uri uri))))
(assert-equal
"☺"
body)))))
(run-fibers-for-tests
(lambda ()
(let* ((web-server
(run-knots-web-server
(lambda (request)
(values '((content-type . (text/plain
(charset . "utf-8")))
(content-length . 3))
(lambda (port)
(display "☺" port))))
#:port 0)) ;; Bind to any port
(port
(web-server-port web-server))
(uri
(build-uri 'http #:host "127.0.0.1" #:port port)))
(let ((response
body
(http-get
uri
;; TODO Remove once using Guile 3.0.10
#:streaming? #t
#:port (non-blocking-open-socket-for-uri uri))))
(assert-equal
"☺"
(utf8->string
(get-bytevector-n body 3)))))))
(run-fibers-for-tests
(lambda ()
(let* ((web-server
(run-knots-web-server
(lambda (request)
(if (string=? (utf8->string
(read-request-body/knots request))
"☺")
(values (build-response #:code 200)
"")
(values (build-response #:code 500)
"")))
#:port 0)) ;; Bind to any port
(port
(web-server-port web-server))
(uri
(build-uri 'http #:host "127.0.0.1" #:port port)))
(let ((response
body
(http-post
uri
#:body "☺"
#:port (non-blocking-open-socket-for-uri uri))))
(assert-equal
200
(response-code response))))))
(run-fibers-for-tests
(lambda ()
(let* ((channel (make-channel))
(web-server
(run-knots-web-server
(lambda (request)
(with-exception-handler
(lambda (exn)
(put-message channel exn))
(lambda ()
(read-request-body/knots request))
#:unwind? #t))
#:port 0)) ;; Bind to any port
(port
(web-server-port web-server))
(uri
(build-uri 'http #:host "127.0.0.1" #:port port)))
(let* ((port (non-blocking-open-socket-for-uri uri))
(request
(build-request
uri
#:method 'POST
#:version '(1 . 1)
#:headers `((connection close)
(content-length . 20)
(Content-Type . "application/octet-stream"))
#:port port)))
(set-port-encoding! port "ISO-8859-1")
(let ((request (write-request request port)))
(display "12")
(force-output port)
(close-port port)))
(assert-true
(request-body-ended-prematurely-error?
(get-message channel))))))
;; Test handling of exceptions when writing the response to a client
(run-fibers-for-tests
(lambda ()
(let* ((exception-handled-sucecssfully-channel
(make-channel))
(port-closed-channel (make-channel))
(web-server
(run-knots-web-server
(lambda (request)
;; TODO Not sure why buffering makes a difference here
(setvbuf (request-port request) 'none)
(get-message port-closed-channel)
(values '((content-type . (text/plain)))
"Hello, World!"))
#:write-response-exception-handler
(lambda (exn request)
(spawn-fiber
(lambda ()
(put-message exception-handled-sucecssfully-channel
#t)))
#f)
#:port 0)) ;; Bind to any port
(port
(web-server-port web-server))
(uri
(build-uri 'http #:host "127.0.0.1" #:port port)))
(let ((request-port (non-blocking-open-socket-for-uri uri)))
(write-request
(build-request uri)
request-port)
(close-port request-port))
(put-message port-closed-channel #t)
(assert-equal (get-message exception-handled-sucecssfully-channel)
#t))))
(display "web-server test finished successfully\n")