Commit | Line | Data |
---|---|---|
abd95148 MD |
1 | /* classes: h_files */ |
2 | ||
56e55ac7 DH |
3 | #ifndef SCM_HOOKS_H |
4 | #define SCM_HOOKS_H | |
5 | /* Copyright (C) 1995,1996,1999,2000,2001 Free Software Foundation, Inc. | |
abd95148 MD |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2, or (at your option) | |
10 | * any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this software; see the file COPYING. If not, write to | |
19 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, | |
20 | * Boston, MA 02111-1307 USA | |
21 | * | |
22 | * As a special exception, the Free Software Foundation gives permission | |
23 | * for additional uses of the text contained in its release of GUILE. | |
24 | * | |
25 | * The exception is that, if you link the GUILE library with other files | |
26 | * to produce an executable, this does not by itself cause the | |
27 | * resulting executable to be covered by the GNU General Public License. | |
28 | * Your use of that executable is in no way restricted on account of | |
29 | * linking the GUILE library code into it. | |
30 | * | |
31 | * This exception does not however invalidate any other reasons why | |
32 | * the executable file might be covered by the GNU General Public License. | |
33 | * | |
34 | * This exception applies only to the code released by the | |
35 | * Free Software Foundation under the name GUILE. If you copy | |
36 | * code from other Free Software Foundation releases into a copy of | |
37 | * GUILE, as the General Public License permits, the exception does | |
38 | * not apply to the code that you add in this way. To avoid misleading | |
39 | * anyone as to the status of such modified files, you must delete | |
40 | * this exception notice from them. | |
41 | * | |
42 | * If you write modifications of your own for GUILE, it is your choice | |
43 | * whether to permit this exception to apply to your modifications. | |
44 | * If you do not wish that, delete this exception notice. */ | |
45 | ||
46 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, | |
47 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ | |
48 | \f | |
49 | ||
50 | #include "libguile/__scm.h" | |
51 | ||
52 | /* | |
53 | * C level hooks | |
54 | */ | |
55 | ||
56 | /* | |
57 | * The interface is designed for and- and or-type hooks which | |
58 | * both may want to indicate success/failure and return a result. | |
59 | */ | |
60 | ||
92c2555f | 61 | typedef enum scm_t_c_hookype_t { |
abd95148 MD |
62 | SCM_C_HOOK_NORMAL, |
63 | SCM_C_HOOK_OR, | |
64 | SCM_C_HOOK_AND | |
92c2555f | 65 | } scm_t_c_hookype_t; |
abd95148 | 66 | |
92c2555f | 67 | typedef void *(*scm_t_c_hook_function) (void *hook_data, |
abd95148 MD |
68 | void *func_data, |
69 | void *data); | |
70 | ||
92c2555f MV |
71 | typedef struct scm_t_c_hook_entry { |
72 | struct scm_t_c_hook_entry *next; | |
73 | scm_t_c_hook_function func; | |
abd95148 | 74 | void *data; |
92c2555f | 75 | } scm_t_c_hook_entry; |
abd95148 | 76 | |
92c2555f MV |
77 | typedef struct scm_t_c_hook { |
78 | scm_t_c_hook_entry *first; | |
79 | scm_t_c_hookype_t type; | |
abd95148 | 80 | void *data; |
92c2555f | 81 | } scm_t_c_hook; |
abd95148 | 82 | |
92c2555f | 83 | extern void scm_c_hook_init (scm_t_c_hook *hook, |
abd95148 | 84 | void *hook_data, |
92c2555f MV |
85 | scm_t_c_hookype_t type); |
86 | extern void scm_c_hook_add (scm_t_c_hook *hook, | |
87 | scm_t_c_hook_function func, | |
abd95148 MD |
88 | void *func_data, |
89 | int appendp); | |
92c2555f MV |
90 | extern void scm_c_hook_remove (scm_t_c_hook *hook, |
91 | scm_t_c_hook_function func, | |
abd95148 | 92 | void *func_data); |
92c2555f | 93 | extern void *scm_c_hook_run (scm_t_c_hook *hook, void *data); |
abd95148 MD |
94 | |
95 | /* | |
96 | * Scheme level hooks | |
97 | */ | |
98 | ||
92c2555f | 99 | extern scm_t_bits scm_tc16_hook; |
abd95148 | 100 | |
e841c3e0 KN |
101 | #define SCM_HOOKP(x) SCM_TYP16_PREDICATE (scm_tc16_hook, x) |
102 | #define SCM_HOOK_ARITY(hook) (SCM_CELL_WORD_0 (hook) >> 16) | |
103 | #define SCM_HOOK_PROCEDURES(hook) SCM_CELL_OBJECT_1 (hook) | |
104 | #define SCM_SET_HOOK_PROCEDURES(hook, procs) SCM_SET_CELL_OBJECT_1 ((hook), (procs)) | |
abd95148 MD |
105 | |
106 | extern SCM scm_make_hook (SCM n_args); | |
abd95148 MD |
107 | extern SCM scm_hook_p (SCM x); |
108 | extern SCM scm_hook_empty_p (SCM hook); | |
109 | extern SCM scm_add_hook_x (SCM hook, SCM thunk, SCM appendp); | |
110 | extern SCM scm_remove_hook_x (SCM hook, SCM thunk); | |
111 | extern SCM scm_reset_hook_x (SCM hook); | |
112 | extern SCM scm_run_hook (SCM hook, SCM args); | |
113 | extern void scm_c_run_hook (SCM hook, SCM args); | |
114 | extern SCM scm_hook_to_list (SCM hook); | |
115 | extern void scm_init_hooks (void); | |
116 | ||
fde50407 ML |
117 | #if (SCM_DEBUG_DEPRECATED == 0) |
118 | extern SCM scm_create_hook (const char* name, int n_args); | |
119 | #endif | |
120 | ||
56e55ac7 | 121 | #endif /* SCM_HOOKS_H */ |
abd95148 MD |
122 | |
123 | /* | |
124 | Local Variables: | |
125 | c-file-style: "gnu" | |
126 | End: | |
127 | */ |