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#ifndef SCM_CHOOKS_H
#define SCM_CHOOKS_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/scm.h"
/*
* C level hooks
*/
/*
* The interface is designed for and- and or-type hooks which
* both may want to indicate success/failure and return a result.
*/
typedef enum scm_t_c_hook_type {
SCM_C_HOOK_NORMAL,
SCM_C_HOOK_OR,
SCM_C_HOOK_AND
} scm_t_c_hook_type;
typedef void *(*scm_t_c_hook_function) (void *hook_data,
void *fn_data,
void *data);
typedef struct scm_t_c_hook_entry {
struct scm_t_c_hook_entry *next;
scm_t_c_hook_function func;
void *data;
} scm_t_c_hook_entry;
typedef struct scm_t_c_hook {
scm_t_c_hook_entry *first;
scm_t_c_hook_type type;
void *data;
} scm_t_c_hook;
SCM_API void scm_c_hook_init (scm_t_c_hook *hook,
void *hook_data,
scm_t_c_hook_type type);
SCM_API void scm_c_hook_add (scm_t_c_hook *hook,
scm_t_c_hook_function func,
void *fn_data,
int appendp);
SCM_API void scm_c_hook_remove (scm_t_c_hook *hook,
scm_t_c_hook_function func,
void *fn_data);
SCM_API void *scm_c_hook_run (scm_t_c_hook *hook, void *data);
#endif /* SCM_CHOOKS_H */
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