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Conflicts: libguile/Makefile.am libguile/coop-defs.h libguile/gc-card.c libguile/gc-freelist.c libguile/gc-malloc.c libguile/gc-mark.c libguile/gc-segment.c libguile/gc.c libguile/gc.h libguile/gc_os_dep.c libguile/hashtab.c libguile/hashtab.h libguile/inline.h libguile/private-gc.h libguile/struct.c libguile/struct.h libguile/threads.c libguile/threads.h libguile/vectors.h libguile/weaks.h test-suite/tests/gc.test
109 lines
3.8 KiB
C
109 lines
3.8 KiB
C
/* classes: h_files */
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#ifndef SCM_WEAKS_H
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#define SCM_WEAKS_H
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/* Copyright (C) 1995,1996,2000,2001, 2003, 2006, 2008 Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libguile/__scm.h"
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#define SCM_WVECTF_WEAK_KEY 1
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#define SCM_WVECTF_WEAK_VALUE 2
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#define SCM_WVECT_WEAK_KEY_P(x) (SCM_I_WVECT_EXTRA(x) & SCM_WVECTF_WEAK_KEY)
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#define SCM_WVECT_WEAK_VALUE_P(x) (SCM_I_WVECT_EXTRA(x) & SCM_WVECTF_WEAK_VALUE)
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/* The DELTA field is used by the abstract hash tables. During GC,
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this field will be set to the number of items that have been
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dropped. The abstract hash table will then use it to update its
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item count. DELTA is unsigned.
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*/
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#define SCM_I_WVECT_DELTA(x) (SCM_I_WVECT_EXTRA(x) >> 3)
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#define SCM_I_SET_WVECT_DELTA(x,n) (SCM_I_SET_WVECT_EXTRA \
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((x), ((SCM_I_WVECT_EXTRA (x) & 7) \
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| ((n) << 3))))
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#define SCM_I_WVECT_TYPE(x) (SCM_I_WVECT_EXTRA(x) & 7)
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#define SCM_I_SET_WVECT_TYPE(x,t) (SCM_I_SET_WVECT_EXTRA \
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((x), (SCM_I_WVECT_EXTRA (x) & ~7) | (t)))
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#define SCM_IS_WHVEC(X) (SCM_I_WVECT_TYPE (X) == 1)
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#define SCM_IS_WHVEC_V(X) (SCM_I_WVECT_TYPE (X) == 2)
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#define SCM_IS_WHVEC_B(X) (SCM_I_WVECT_TYPE (X) == 3)
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#define SCM_IS_WHVEC_ANY(X) (SCM_I_WVECT_TYPE (X) != 0)
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/* Weak pairs. */
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SCM_API SCM scm_weak_car_pair (SCM car, SCM cdr);
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SCM_API SCM scm_weak_cdr_pair (SCM car, SCM cdr);
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SCM_API SCM scm_doubly_weak_pair (SCM car, SCM cdr);
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/* Testing the weak component(s) of a cell for reachability. */
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#define SCM_WEAK_PAIR_WORD_DELETED_P(_cell, _word) \
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(SCM_CELL_OBJECT ((_cell), (_word)) == SCM_PACK (NULL))
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#define SCM_WEAK_PAIR_CAR_DELETED_P(_cell) \
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(SCM_WEAK_PAIR_WORD_DELETED_P ((_cell), 0))
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#define SCM_WEAK_PAIR_CDR_DELETED_P(_cell) \
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(SCM_WEAK_PAIR_WORD_DELETED_P ((_cell), 1))
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#define SCM_WEAK_PAIR_DELETED_P(_cell) \
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((SCM_WEAK_PAIR_CAR_DELETED_P (_cell)) \
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|| (SCM_WEAK_PAIR_CDR_DELETED_P (_cell)))
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/* Accessing the components of a weak cell. */
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#define SCM_WEAK_PAIR_WORD(_cell, _word) \
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((SCM_WEAK_PAIR_WORD_DELETED_P ((_cell), (_word))) \
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? SCM_BOOL_F : SCM_CAR (pair))
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#define SCM_WEAK_PAIR_CAR(_cell) (SCM_WEAK_PAIR_WORD ((_cell), 0))
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#define SCM_WEAK_PAIR_CDR(_cell) (SCM_WEAK_PAIR_WORD ((_cell), 1))
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/* Weak vectors and weak hash tables. */
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SCM_API SCM scm_make_weak_vector (SCM k, SCM fill);
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SCM_API SCM scm_weak_vector (SCM l);
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SCM_API SCM scm_weak_vector_p (SCM x);
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SCM_API SCM scm_make_weak_key_alist_vector (SCM k);
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SCM_API SCM scm_make_weak_value_alist_vector (SCM k);
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SCM_API SCM scm_make_doubly_weak_alist_vector (SCM k);
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SCM_API SCM scm_weak_key_alist_vector_p (SCM x);
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SCM_API SCM scm_weak_value_alist_vector_p (SCM x);
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SCM_API SCM scm_doubly_weak_alist_vector_p (SCM x);
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SCM_INTERNAL SCM scm_init_weaks_builtins (void);
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SCM_INTERNAL void scm_weaks_prehistory (void);
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SCM_INTERNAL void scm_init_weaks (void);
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SCM_INTERNAL void scm_i_init_weak_vectors_for_gc (void);
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SCM_INTERNAL void scm_i_mark_weak_vector (SCM w);
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SCM_INTERNAL int scm_i_mark_weak_vectors_non_weaks (void);
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SCM_INTERNAL void scm_i_remove_weaks_from_weak_vectors (void);
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#endif /* SCM_WEAKS_H */
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/*
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Local Variables:
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c-file-style: "gnu"
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End:
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*/
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