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-rw-r--r--libguile/hooks.h53
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diff --git a/libguile/hooks.h b/libguile/hooks.h
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+++ b/libguile/hooks.h
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+#ifndef SCM_HOOKS_H
+#define SCM_HOOKS_H
+
+/* Copyright 1995-1996,1999,2000-2001,2006,2008-2009,2018
+ 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/error.h>
+#include <libguile/smob.h>
+
+/*
+ * Scheme level hooks
+ */
+
+SCM_API scm_t_bits scm_tc16_hook;
+
+#define SCM_HOOKP(x) SCM_SMOB_PREDICATE (scm_tc16_hook, x)
+#define SCM_HOOK_ARITY(hook) SCM_SMOB_FLAGS (hook)
+#define SCM_HOOK_PROCEDURES(hook) SCM_SMOB_OBJECT (hook)
+#define SCM_SET_HOOK_PROCEDURES(hook, procs) SCM_SET_SMOB_OBJECT ((hook), (procs))
+
+#define SCM_VALIDATE_HOOK(pos, a) SCM_MAKE_VALIDATE_MSG (pos, a, HOOKP, "hook")
+
+SCM_API SCM scm_make_hook (SCM n_args);
+SCM_API SCM scm_hook_p (SCM x);
+SCM_API SCM scm_hook_empty_p (SCM hook);
+SCM_API SCM scm_add_hook_x (SCM hook, SCM thunk, SCM appendp);
+SCM_API SCM scm_remove_hook_x (SCM hook, SCM thunk);
+SCM_API SCM scm_reset_hook_x (SCM hook);
+SCM_API SCM scm_run_hook (SCM hook, SCM args);
+SCM_API void scm_c_run_hook (SCM hook, SCM args);
+SCM_API void scm_c_run_hookn (SCM hook, SCM *argv, size_t nargs);
+SCM_API SCM scm_hook_to_list (SCM hook);
+SCM_INTERNAL void scm_init_hooks (void);
+
+#endif /* SCM_HOOKS_H */