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/* classes: h_files */
#ifndef SCM_HOOKS_H
#define SCM_HOOKS_H
/* Copyright (C) 1995,1996,1999,2000,2001 Free Software Foundation, Inc.
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#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 *func_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 *func_data,
int appendp);
SCM_API void scm_c_hook_remove (scm_t_c_hook *hook,
scm_t_c_hook_function func,
void *func_data);
SCM_API void *scm_c_hook_run (scm_t_c_hook *hook, void *data);
/*
* 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))
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 SCM scm_hook_to_list (SCM hook);
SCM_API void scm_init_hooks (void);
#endif /* SCM_HOOKS_H */
/*
Local Variables:
c-file-style: "gnu"
End:
*/
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