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 1082693..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 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
@@ -28,32 +29,78 @@
 
 #define SCM_WVECTF_WEAK_KEY   1
 #define SCM_WVECTF_WEAK_VALUE 2
-#define SCM_WVECTF_NOSCAN     4
 
-#define SCM_WVECT_WEAK_KEY_P(x) (SCM_I_WVECT_TYPE(x) & SCM_WVECTF_WEAK_KEY)
-#define SCM_WVECT_WEAK_VALUE_P(x) (SCM_I_WVECT_TYPE(x) & SCM_WVECTF_WEAK_VALUE)
-#define SCM_WVECT_NOSCAN_P(x) (SCM_I_WVECT_TYPE (x) & SCM_WVECTF_NOSCAN)
-#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)
+#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)
 
-SCM_API SCM scm_weak_vectors;
+#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_API void scm_weaks_prehistory (void);
-SCM_API SCM scm_init_weaks_builtins (void);
-SCM_API void scm_init_weaks (void);
+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 */