build: Don't include <config.h> in native programs when cross-compiling.

[bpt/guile.git] / libguile / weaks.h

diff --git a/libguile/weaks.h b/libguile/weaks.h
index 81c1774..be2c686 100644 (file)
--- a/libguile/weaks.h
+++ b/libguile/weaks.h
@@ -3,21 +3,22 @@
 #ifndef SCM_WEAKS_H
 #define SCM_WEAKS_H
 
-/* Copyright (C) 1995,1996,2000,2001, 2003, 2006, 2008 Free Software Foundation, Inc.
+/* 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 2.1 of the License, or (at your option) any later version.
+ * 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
+ * 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
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
  */
 
 \f
@@ -32,17 +33,6 @@
 #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)
 
-/* The DELTA field is used by the abstract hash tables.  During GC,
-   this field will be set to the number of items that have been
-   dropped.  The abstract hash table will then use it to update its
-   item count.  DELTA is unsigned.
-*/
-
-#define SCM_I_WVECT_DELTA(x)       (SCM_I_WVECT_EXTRA(x) >> 3)
-#define SCM_I_SET_WVECT_DELTA(x,n) (SCM_I_SET_WVECT_EXTRA \
-                                   ((x), ((SCM_I_WVECT_EXTRA (x) & 7)  \
-                                          | ((n) << 3))))
-
 #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)))
@@ -54,13 +44,13 @@
 \f
 /* Weak pairs.  */
 
-SCM_API SCM scm_weak_car_pair (SCM car, SCM cdr);
-SCM_API SCM scm_weak_cdr_pair (SCM car, SCM cdr);
-SCM_API SCM scm_doubly_weak_pair (SCM car, SCM cdr);
+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_CELL_OBJECT ((_cell), (_word)) == SCM_PACK (NULL))
+  (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)     \
@@ -70,10 +60,12 @@ SCM_API SCM scm_doubly_weak_pair (SCM car, SCM cdr);
   ((SCM_WEAK_PAIR_CAR_DELETED_P (_cell))       \
    || (SCM_WEAK_PAIR_CDR_DELETED_P (_cell)))
 
-/* Accessing the components of a weak 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_BOOL_F : SCM_CAR (pair))
+  (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))
 
@@ -84,6 +76,16 @@ SCM_API SCM scm_doubly_weak_pair (SCM car, SCM cdr);
 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);