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2b829bbb | 1 | /* Copyright (C) 1998,1999,2000,2001, 2006 Free Software Foundation, Inc. |
e1f2bf99 | 2 | * |
73be1d9e MV |
3 | * This library is free software; you can redistribute it and/or |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
e1f2bf99 | 7 | * |
73be1d9e MV |
8 | * This library is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * Lesser General Public License for more details. | |
e1f2bf99 | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
92205699 | 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
73be1d9e | 16 | */ |
1bbd0b84 | 17 | |
e1f2bf99 | 18 | \f |
e1f2bf99 MD |
19 | /* This is an implementation of guardians as described in |
20 | * R. Kent Dybvig, Carl Bruggeman, and David Eby (1993) "Guardians in | |
21 | * a Generation-Based Garbage Collector" ACM SIGPLAN Conference on | |
22 | * Programming Language Design and Implementation, June 1993 | |
23 | * ftp://ftp.cs.indiana.edu/pub/scheme-repository/doc/pubs/guardians.ps.gz | |
24 | * | |
06c1d900 MV |
25 | * Original design: Mikael Djurfeldt |
26 | * Original implementation: Michael Livshin | |
27 | * Hacked on since by: everybody | |
28 | * | |
56495472 ML |
29 | * By this point, the semantics are actually quite different from |
30 | * those described in the abovementioned paper. The semantic changes | |
31 | * are there to improve safety and intuitiveness. The interface is | |
32 | * still (mostly) the one described by the paper, however. | |
33 | * | |
06c1d900 MV |
34 | * Boiled down again: Marius Vollmer |
35 | * | |
36 | * Now they should again behave like those described in the paper. | |
37 | * Scheme guardians should be simple and friendly, not like the greedy | |
38 | * monsters we had... | |
bc700b6d LC |
39 | * |
40 |