6 /* Copyright (C) 1995,1996,1999,2000,2001, 2006 Free Software Foundation, Inc.
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "libguile/__scm.h"
32 * The interface is designed for and- and or-type hooks which
33 * both may want to indicate success/failure and return a result.
36 typedef enum scm_t_c_hook_type {
42 typedef void *(*scm_t_c_hook_function) (void *hook_data,
46 typedef struct scm_t_c_hook_entry {
47 struct scm_t_c_hook_entry *next;
48 scm_t_c_hook_function func;
52 typedef struct scm_t_c_hook {
53 scm_t_c_hook_entry *first;
54 scm_t_c_hook_type type;
58 SCM_API void scm_c_hook_init (scm_t_c_hook *hook,
60 scm_t_c_hook_type type);
61 SCM_API void scm_c_hook_add (scm_t_c_hook *hook,
62 scm_t_c_hook_function func,
65 SCM_API void scm_c_hook_remove (scm_t_c_hook *hook,
66 scm_t_c_hook_function func,
68 SCM_API void *scm_c_hook_run (scm_t_c_hook *hook, void *data);
74 SCM_API scm_t_bits scm_tc16_hook;
76 #define SCM_HOOKP(x) SCM_SMOB_PREDICATE (scm_tc16_hook, x)
77 #define SCM_HOOK_ARITY(hook) SCM_SMOB_FLAGS (hook)
78 #define SCM_HOOK_PROCEDURES(hook) SCM_SMOB_OBJECT (hook)
79 #define SCM_SET_HOOK_PROCEDURES(hook, procs) SCM_SET_SMOB_OBJECT ((hook), (procs))
81 SCM_API SCM scm_make_hook (SCM n_args);
82 SCM_API SCM scm_hook_p (SCM x);
83 SCM_API SCM scm_hook_empty_p (SCM hook);
84 SCM_API SCM scm_add_hook_x (SCM hook, SCM thunk, SCM appendp);
85 SCM_API SCM scm_remove_hook_x (SCM hook, SCM thunk);
86 SCM_API SCM scm_reset_hook_x (SCM hook);
87 SCM_API SCM scm_run_hook (SCM hook, SCM args);
88 SCM_API void scm_c_run_hook (SCM hook, SCM args);
89 SCM_API SCM scm_hook_to_list (SCM hook);
90 SCM_API void scm_init_hooks (void);
92 #endif /* SCM_HOOKS_H */