6 /* Copyright (C) 1995,1996,1999,2000,2001, 2006, 2008, 2009 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 License
10 * as published by the Free Software Foundation; either version 3 of
11 * the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful, but
14 * 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
26 #include "libguile/__scm.h"
33 * The interface is designed for and- and or-type hooks which
34 * both may want to indicate success/failure and return a result.
37 typedef enum scm_t_c_hook_type
{
43 typedef void *(*scm_t_c_hook_function
) (void *hook_data
,
47 typedef struct scm_t_c_hook_entry
{
48 struct scm_t_c_hook_entry
*next
;
49 scm_t_c_hook_function func
;
53 typedef struct scm_t_c_hook
{
54 scm_t_c_hook_entry
*first
;
55 scm_t_c_hook_type type
;
59 SCM_API
void scm_c_hook_init (scm_t_c_hook
*hook
,
61 scm_t_c_hook_type type
);
62 SCM_API
void scm_c_hook_add (scm_t_c_hook
*hook
,
63 scm_t_c_hook_function func
,
66 SCM_API
void scm_c_hook_remove (scm_t_c_hook
*hook
,
67 scm_t_c_hook_function func
,
69 SCM_API
void *scm_c_hook_run (scm_t_c_hook
*hook
, void *data
);
75 SCM_API scm_t_bits scm_tc16_hook
;
77 #define SCM_HOOKP(x) SCM_SMOB_PREDICATE (scm_tc16_hook, x)
78 #define SCM_HOOK_ARITY(hook) SCM_SMOB_FLAGS (hook)
79 #define SCM_HOOK_PROCEDURES(hook) SCM_SMOB_OBJECT (hook)
80 #define SCM_SET_HOOK_PROCEDURES(hook, procs) SCM_SET_SMOB_OBJECT ((hook), (procs))
82 SCM_API SCM
scm_make_hook (SCM n_args
);
83 SCM_API SCM
scm_hook_p (SCM x
);
84 SCM_API SCM
scm_hook_empty_p (SCM hook
);
85 SCM_API SCM
scm_add_hook_x (SCM hook
, SCM thunk
, SCM appendp
);
86 SCM_API SCM
scm_remove_hook_x (SCM hook
, SCM thunk
);
87 SCM_API SCM
scm_reset_hook_x (SCM hook
);
88 SCM_API SCM
scm_run_hook (SCM hook
, SCM args
);
89 SCM_API
void scm_c_run_hook (SCM hook
, SCM args
);
90 SCM_API
void scm_c_run_hookn (SCM hook
, SCM
*argv
, size_t nargs
);
91 SCM_API SCM
scm_hook_to_list (SCM hook
);
92 SCM_INTERNAL
void scm_init_hooks (void);
94 #endif /* SCM_HOOKS_H */