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;;;; gc.test --- test guile's garbage collection -*- scheme -*-
;;;; Copyright (C) 2000, 2001, 2004, 2006, 2007, 2008 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
(use-modules (ice-9 documentation)
(test-suite lib))
;;;
;;; miscellaneous
;;;
(define (documented? object)
(not (not (object-documentation object))))
;; In guile 1.6.4 this test bombed, due to the record in h being collected
;; by the gc, but not removed from h, leaving "x" as a freed cell.
;; The usual correct result here is for x to be #f, but there's always a
;; chance gc will mark something used when it isn't, so we allow x to be a
;; record too.
(pass-if "weak-values versus records"
(let ((rec-type (make-record-type "foo" '()))
(h (make-weak-value-hash-table 61)))
(hash-set! h "foo" ((record-constructor rec-type)))
(gc)
(let ((x (hash-ref h "foo")))
(or (not x)
((record-predicate rec-type) x)))))
;;;
;;;
;;;
(with-test-prefix "gc"
(pass-if "after-gc-hook gets called"
(let* ((foo #f)
(thunk (lambda () (set! foo #t))))
(add-hook! after-gc-hook thunk)
(gc)
(remove-hook! after-gc-hook thunk)
foo)))
(with-test-prefix "gc"
(pass-if "Unused modules are removed"
(let* ((guard (make-guardian))
(total 1000))
(for-each (lambda (x) (guard (make-module))) (iota total))
;; XXX: This hack aims to clean up the stack to make sure we
;; don't leave a reference to one of the modules we created. It
;; proved to be useful on SPARC:
;; http://lists.gnu.org/archive/html/guile-devel/2008-02/msg00006.html .
(let cleanup ((i 10))
(and (> i 0)
(begin (cleanup (1- i)) i)))
(gc)
(gc) ;; twice: have to kill the weak vectors.
(= (length (filter (lambda (x)
(eq? x #t))
(map (lambda (x) (and (guard) #t))
(iota total))))
total))))
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