-/* classes: h_files */
-
-#ifndef WEAKSH
-#define WEAKSH
-/* Copyright (C) 1995,1996 Free Software Foundation, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; see the file COPYING. If not, write to
- * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
- * Boston, MA 02111-1307 USA
- *
- * As a special exception, the Free Software Foundation gives permission
- * for additional uses of the text contained in its release of GUILE.
- *
- * The exception is that, if you link the GUILE library with other files
- * to produce an executable, this does not by itself cause the
- * resulting executable to be covered by the GNU General Public License.
- * Your use of that executable is in no way restricted on account of
- * linking the GUILE library code into it.
- *
- * This exception does not however invalidate any other reasons why
- * the executable file might be covered by the GNU General Public License.
- *
- * This exception applies only to the code released by the
- * Free Software Foundation under the name GUILE. If you copy
- * code from other Free Software Foundation releases into a copy of
- * GUILE, as the General Public License permits, the exception does
- * not apply to the code that you add in this way. To avoid misleading
- * anyone as to the status of such modified files, you must delete
- * this exception notice from them.
- *
- * If you write modifications of your own for GUILE, it is your choice
- * whether to permit this exception to apply to your modifications.
- * If you do not wish that, delete this exception notice. */
-
-/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
- gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
-\f
-
-#include "libguile/__scm.h"
-
-\f
-
-
-#define SCM_WVECTP(x) (SCM_NIMP(x) && (SCM_TYP7(x)==scm_tc7_wvect))
-#define SCM_IS_WHVEC(X) (SCM_VELTS(X)[-1] == 1)
-#define SCM_IS_WHVEC_V(X) (SCM_VELTS(X)[-1] == 2)
-#define SCM_IS_WHVEC_B(X) (SCM_VELTS(X)[-1] == 3)
-#define SCM_IS_WHVEC_ANY(X) (SCM_VELTS(X)[-1])
-#define SCM_WVECT_GC_CHAIN(X) (SCM_VELTS(X)[-2])
-
-\f
-
-extern SCM scm_make_weak_vector (SCM k, SCM fill);
-extern SCM scm_weak_vector (SCM l);
-extern SCM scm_weak_vector_p (SCM x);
-extern SCM scm_make_weak_key_hash_table (SCM k);
-extern SCM scm_make_weak_value_hash_table (SCM k);
-extern SCM scm_make_doubly_weak_hash_table (SCM k);
-extern SCM scm_weak_key_hash_table_p (SCM x);
-extern SCM scm_weak_value_hash_table_p (SCM x);
-extern SCM scm_doubly_weak_hash_table_p (SCM x);
-extern void scm_init_weaks (void);
-
-#endif /* WEAKSH */
+/* classes: h_files */
+
+#ifndef SCM_WEAKS_H
+#define SCM_WEAKS_H
+
+/* Copyright (C) 1995,1996,2000,2001, 2003, 2006, 2008, 2009, 2011, 2014 Free Software Foundation, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+\f
+
+#include "libguile/__scm.h"
+
+\f
+
+#define SCM_WVECTF_WEAK_KEY 1
+#define SCM_WVECTF_WEAK_VALUE 2
+
+#define SCM_WVECT_WEAK_KEY_P(x) (SCM_I_WVECT_EXTRA(x) & SCM_WVECTF_WEAK_KEY)
+#define SCM_WVECT_WEAK_VALUE_P(x) (SCM_I_WVECT_EXTRA(x) & SCM_WVECTF_WEAK_VALUE)
+
+#define SCM_I_WVECT_TYPE(x) (SCM_I_WVECT_EXTRA(x) & 7)
+#define SCM_I_SET_WVECT_TYPE(x,t) (SCM_I_SET_WVECT_EXTRA \
+ ((x), (SCM_I_WVECT_EXTRA (x) & ~7) | (t)))
+#define SCM_IS_WHVEC(X) (SCM_I_WVECT_TYPE (X) == 1)
+#define SCM_IS_WHVEC_V(X) (SCM_I_WVECT_TYPE (X) == 2)
+#define SCM_IS_WHVEC_B(X) (SCM_I_WVECT_TYPE (X) == 3)
+#define SCM_IS_WHVEC_ANY(X) (SCM_I_WVECT_TYPE (X) != 0)
+
+\f
+/* Weak pairs. */
+
+SCM_INTERNAL SCM scm_weak_car_pair (SCM car, SCM cdr);
+SCM_INTERNAL SCM scm_weak_cdr_pair (SCM car, SCM cdr);
+SCM_INTERNAL SCM scm_doubly_weak_pair (SCM car, SCM cdr);
+
+/* Testing the weak component(s) of a cell for reachability. */
+#define SCM_WEAK_PAIR_WORD_DELETED_P(_cell, _word) \
+ (SCM_UNPACK (SCM_CELL_OBJECT ((_cell), (_word))) == 0)
+#define SCM_WEAK_PAIR_CAR_DELETED_P(_cell) \
+ (SCM_WEAK_PAIR_WORD_DELETED_P ((_cell), 0))
+#define SCM_WEAK_PAIR_CDR_DELETED_P(_cell) \
+ (SCM_WEAK_PAIR_WORD_DELETED_P ((_cell), 1))
+
+#define SCM_WEAK_PAIR_DELETED_P(_cell) \
+ ((SCM_WEAK_PAIR_CAR_DELETED_P (_cell)) \
+ || (SCM_WEAK_PAIR_CDR_DELETED_P (_cell)))
+
+/* Accessing the components of a weak cell. These return `SCM_UNDEFINED' if
+ the car/cdr has been collected. */
+#define SCM_WEAK_PAIR_WORD(_cell, _word) \
+ (SCM_WEAK_PAIR_WORD_DELETED_P ((_cell), (_word)) \
+ ? SCM_UNDEFINED \
+ : SCM_CELL_OBJECT ((_cell), (_word)))
+#define SCM_WEAK_PAIR_CAR(_cell) (SCM_WEAK_PAIR_WORD ((_cell), 0))
+#define SCM_WEAK_PAIR_CDR(_cell) (SCM_WEAK_PAIR_WORD ((_cell), 1))
+
+
+\f
+/* Weak vectors and weak hash tables. */
+
+SCM_API SCM scm_make_weak_vector (SCM k, SCM fill);
+SCM_API SCM scm_weak_vector (SCM l);
+SCM_API SCM scm_weak_vector_p (SCM x);
+SCM_API SCM scm_weak_vector_length (SCM v);
+SCM_API SCM scm_weak_vector_ref (SCM v, SCM k);
+SCM_API SCM scm_weak_vector_set_x (SCM v, SCM k, SCM x);
+
+SCM_API SCM scm_c_make_weak_vector (size_t k, SCM fill);
+SCM_API int scm_is_weak_vector (SCM obj);
+SCM_API size_t scm_c_weak_vector_length (SCM vec);
+SCM_API SCM scm_c_weak_vector_ref (SCM v, size_t k);
+SCM_API void scm_c_weak_vector_set_x (SCM v, size_t k, SCM x);
+
+SCM_API SCM scm_make_weak_key_alist_vector (SCM k);
+SCM_API SCM scm_make_weak_value_alist_vector (SCM k);
+SCM_API SCM scm_make_doubly_weak_alist_vector (SCM k);
+SCM_API SCM scm_weak_key_alist_vector_p (SCM x);
+SCM_API SCM scm_weak_value_alist_vector_p (SCM x);
+SCM_API SCM scm_doubly_weak_alist_vector_p (SCM x);
+SCM_INTERNAL SCM scm_init_weaks_builtins (void);
+SCM_INTERNAL void scm_weaks_prehistory (void);
+SCM_INTERNAL void scm_init_weaks (void);
+
+SCM_INTERNAL void scm_i_init_weak_vectors_for_gc (void);
+SCM_INTERNAL void scm_i_mark_weak_vector (SCM w);
+SCM_INTERNAL int scm_i_mark_weak_vectors_non_weaks (void);
+SCM_INTERNAL void scm_i_remove_weaks_from_weak_vectors (void);
+
+
+#endif /* SCM_WEAKS_H */
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
HCoop / bpt / guile.git / blobdiff