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[xemacs-hg @ 2005-11-25 01:41:31 by crestani] Incremental Garbage Collector
author crestani
date Fri, 25 Nov 2005 01:42:08 +0000
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children 308d34e9f07d
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3091:c22d8984148c 3092:141c2920ea48
1 /* Virtual diry bit implementation for XEmacs.
2 Copyright (C) 2005 Marcus Crestani.
3
4 This file is part of XEmacs.
5
6 XEmacs is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
9 later version.
10
11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with XEmacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
20
21 /* Synched up with: Not in FSF. */
22
23 #include "lisp.h"
24
25 #ifndef INCLUDED_vdb_h_
26 #define INCLUDED_vdb_h_
27
28
29 /*--- prototypes -------------------------------------------------------*/
30
31 BEGIN_C_DECLS
32
33 /* Platform dependent signal handling: */
34
35 /* Install the platform-dependent signal handler. */
36 void vdb_install_signal_handler (void);
37
38 /* Platform dependent memory protection. */
39 void vdb_protect (void *ptr, EMACS_INT len);
40 void vdb_unprotect (void *ptr, EMACS_INT len);
41
42
43
44 /* Common (platform independent) virtual diry bit stuff: */
45
46 /* Start the write barrier. This function is called when a garbage
47 collection is suspendend and the client is resumed. */
48 void vdb_start_dirty_bits_recording (void);
49 /* Stop the write barrier. This function is called when the client is
50 suspendend and garbage collection is resumed. */
51 void vdb_stop_dirty_bits_recording (void);
52
53 /* Record page faults: Add the object pointed to by addr to the write
54 barrer's internal data structure that stores modified objects.
55 This function is called by the write barrier's fault handler. */
56 void vdb_designate_modified (void *addr);
57
58 /* Propagate page faults to garbage collector: Read out the write
59 barrier's internal data structure that stores modified objects and
60 pass the information to the garbage collector. This function is
61 called by vdb_stop_dirty_bits_recording(). Return how many objects
62 have to be re-examined by the garbage collector. */
63 int vdb_read_dirty_bits (void);
64
65 /* Provides Lisp functions for testing vdb implementation. */
66 void syms_of_vdb (void);
67
68 END_C_DECLS
69
70 #endif /* INCLUDED_vdb_h_ */