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-rw-r--r--libguile/atomic.h61
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diff --git a/libguile/atomic.h b/libguile/atomic.h
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+++ b/libguile/atomic.h
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+#ifndef SCM_ATOMIC_H
+#define SCM_ATOMIC_H
+
+/* Copyright 2016,2018
+ Free Software Foundation, Inc.
+
+ This file is part of Guile.
+
+ Guile 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.
+
+ Guile 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 Guile. If not, see
+ <https://www.gnu.org/licenses/>. */
+
+
+
+#include "libguile/gc.h"
+
+
+
+static inline int
+scm_is_atomic_box (SCM obj)
+{
+ return SCM_HAS_TYP7 (obj, scm_tc7_atomic_box);
+}
+
+static inline SCM*
+scm_atomic_box_loc (SCM obj)
+{
+ return SCM_CELL_OBJECT_LOC (obj, 1);
+}
+
+#define SCM_VALIDATE_ATOMIC_BOX(pos, var) \
+ do { \
+ SCM_ASSERT_TYPE (scm_is_atomic_box (var), var, pos, FUNC_NAME, \
+ "atomic box"); \
+ } while (0)
+
+
+
+#ifdef BUILDING_LIBGUILE
+SCM_INTERNAL SCM scm_make_atomic_box (SCM init);
+SCM_INTERNAL SCM scm_atomic_box_p (SCM obj);
+SCM_INTERNAL SCM scm_atomic_box_ref (SCM box);
+SCM_INTERNAL SCM scm_atomic_box_set_x (SCM box, SCM val);
+SCM_INTERNAL SCM scm_atomic_box_swap_x (SCM box, SCM val);
+SCM_INTERNAL SCM scm_atomic_box_compare_and_swap_x (SCM box, SCM expected, SCM desired);
+SCM_INTERNAL void scm_i_atomic_box_print (SCM box, SCM port, scm_print_state *pstate);
+
+SCM_INTERNAL void scm_register_atomic (void);
+#endif /* BUILDING_LIBGUILE */
+
+#endif /* SCM_ATOMIC_H */