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[bpt/guile.git] / libguile / bdw-gc.h
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1#ifndef SCM_BDW_GC_H
2#define SCM_BDW_GC_H
e7bca227 3
aef1fcf9 4/* Copyright (C) 2006, 2008, 2009, 2011, 2012, 2013, 2014 Free Software Foundation, Inc.
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5 *
6 * This library is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public License
8 * as published by the Free Software Foundation; either version 3 of
9 * the License, or (at your option) any later version.
e7bca227 10 *
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11 * This library is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 * 02110-1301 USA
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20 */
21
22/* Correct header inclusion. */
23
aec3d99b 24#include "libguile/scmconfig.h"
e7bca227 25
950a966e 26#if SCM_USE_PTHREAD_THREADS
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27
28/* When pthreads are used, let `libgc' know about it and redirect allocation
29 calls such as `GC_MALLOC ()' to (contention-free, faster) thread-local
30 allocation. */
31
32# define GC_THREADS 1
33# define GC_REDIRECT_TO_LOCAL 1
34
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35/* Don't #define pthread routines to their GC_pthread counterparts.
36 Instead we will be careful inside Guile to use the GC_pthread
37 routines. */
38# define GC_NO_THREAD_REDIRECTS 1
39
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40#ifdef __MINGW32__
41/* Rely on pthreads-w32. */
42#define GC_WIN32_PTHREADS
43#endif
44
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45#endif
46
47#include <gc/gc.h>
ebd78213 48
dbe4d258 49/* Return true if PTR points to the heap. */
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50#define SCM_I_IS_POINTER_TO_THE_HEAP(ptr) \
51 (GC_base (ptr) != NULL)
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52
53/* Register a disappearing link for the object pointed to by OBJ such that
54 the pointer pointed to be LINK is cleared when OBJ is reclaimed. Do so
55 only if OBJ actually points to the heap. See
56 http://thread.gmane.org/gmane.comp.programming.garbage-collection.boehmgc/2563
57 for details. */
58#define SCM_I_REGISTER_DISAPPEARING_LINK(link, obj) \
59 ((SCM_I_IS_POINTER_TO_THE_HEAP (obj)) \
60 ? GC_GENERAL_REGISTER_DISAPPEARING_LINK ((link), (obj)) \
61 : 0)
62
63
1c44468d 64#endif /* SCM_BDW_GC_H */