4 /* Copyright (C) 2006, 2008, 2009, 2011, 2012, 2013, 2014 Free Software Foundation, Inc.
6 * This library is free software; you can redistribute it and/or
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.
11 * This library is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
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
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
22 /* Correct header inclusion. */
24 #include "libguile/scmconfig.h"
26 #ifdef SCM_USE_PTHREAD_THREADS
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
33 # define GC_REDIRECT_TO_LOCAL 1
35 /* Don't #define pthread routines to their GC_pthread counterparts.
36 Instead we will be careful inside Guile to use the GC_pthread
38 # define GC_NO_THREAD_REDIRECTS 1
41 /* Rely on pthreads-w32. */
42 #define GC_WIN32_PTHREADS
49 /* Return true if PTR points to the heap. */
50 #define SCM_I_IS_POINTER_TO_THE_HEAP(ptr) \
51 (GC_base (ptr) != NULL)
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
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)) \
64 #endif /* SCM_BDW_GC_H */