Import guile-1.8 as multiple upstream tarball component

[lilypond.git] / guile18 / libguile / weaks.h

diff --git a/guile18/libguile/weaks.h b/guile18/libguile/weaks.h
new file mode 100644 (file)
index 0000000..ec9e7b4
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+++ b/guile18/libguile/weaks.h
@@ -0,0 +1,79 @@
+/* classes: h_files */
+
+#ifndef SCM_WEAKS_H
+#define SCM_WEAKS_H
+
+/* Copyright (C) 1995,1996,2000,2001, 2003, 2006 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.
+ *
+ * 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)
+
+/* 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)))
+#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
+
+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_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 SCM scm_init_weaks_builtins (void);
+SCM_API void scm_init_weaks (void);
+
+SCM_API void scm_i_init_weak_vectors_for_gc (void);
+SCM_API void scm_i_mark_weak_vector (SCM w);
+SCM_API int scm_i_mark_weak_vectors_non_weaks (void);
+SCM_API void scm_i_remove_weaks_from_weak_vectors (void);
+
+#endif  /* SCM_WEAKS_H */
+
+/*
+  Local Variables:
+  c-file-style: "gnu"
+  End:
+*/