cbaines/guile-knots
1
Fork 0
Code Issues 1 Pull requests Activity Actions

Add display, simple-format and format variants

Browse source 
Which call put-bytevector for performing output. When used in
combination with an unbuffered port, this should be safer than using
the normal Guile procedures, as I think it'll avoid writing to the
buffers, while still avoiding single character at a time output.

More research is needed though in to how to output to stdout/stderr
when using fibers with a parallelism greater than 1.
This commit is contained in:
Christopher Baines 2026-01-12 10:00:35 +00:00
parent 39ae5177f2
commit 094259b049
3 changed files with 69 additions and 25 deletions
Download patch file Download diff file Expand all files Collapse all files

56
knots.scm
View file

@ -1,7 +1,9 @@
(define-module (knots)
#:use-module (srfi srfi-1)
#:use-module (ice-9 match)
#:use-module (ice-9 binary-ports)
#:use-module (ice-9 suspendable-ports)
#:use-module (rnrs bytevectors)
#:use-module (fibers)
#:use-module (fibers conditions)
#:use-module (system repl debug)
@ -11,6 +13,10 @@
call-with-sigint
display/knots
simple-format/knots
format/knots
&knots-exception
make-knots-exception
knots-exception?
@ -51,6 +57,34 @@
;; restore original C handler.
(sigaction SIGINT #f))))))
(define* (display/knots obj #:optional (port (current-output-port)))
(put-bytevector
port
(string->utf8
(call-with-output-string
(lambda (port)
(display obj port))))))
(define (simple-format/knots port s . args)
(let ((str (apply simple-format #f s args)))
(if (eq? #f port)
str
(display/knots
str
(if (eq? #t port)
(current-output-port)
port)))))
(define (format/knots port s . args)
(let ((str (apply format #f s args)))
(if (eq? #f port)
str
(display/knots
str
(if (eq? #t port)
(current-output-port)
port)))))
(define &knots-exception
(make-exception-type '&knots-exception
&exception
@ -135,13 +169,19 @@
(error-string
(with-exception-handler
(lambda (exn)
(display (get-output-string string-port)
port)
(display/knots (get-output-string string-port)
port)
(close-output-port string-port)
(display "\n\n" port)
(display/knots "\n\n" port)
(backtrace port)
(simple-format
(let* ((stack (make-stack #t))
(backtrace
(call-with-output-string
(lambda (port)
(display-backtrace stack port)
(newline port)))))
(display/knots backtrace))
(simple-format/knots
port
"\nexception in print-backtrace-and-exception/knots: ~A\n"
exn)
@ -151,15 +191,15 @@
(let ((str (get-output-string string-port)))
(close-output-port string-port)
str)))))
(display error-string port)))
(display/knots error-string port)))
(define* (spawn-fiber/knots thunk #:optional scheduler #:key parallel?)
(spawn-fiber
(lambda ()
(with-exception-handler
(lambda (exn)
(display "Uncaught exception in task:\n"
(current-error-port))
(display/knots "Uncaught exception in task:\n"
(current-error-port))
(print-backtrace-and-exception/knots exn))
(lambda ()
(with-exception-handler