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124 lines
4.1 KiB
C
124 lines
4.1 KiB
C
/* classes: h_files */
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#ifndef SCM_HOOKS_H
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#define SCM_HOOKS_H
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/* Copyright (C) 1995,1996,1999,2000,2001 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA
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*
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* As a special exception, the Free Software Foundation gives permission
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* for additional uses of the text contained in its release of GUILE.
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*
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* The exception is that, if you link the GUILE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the GUILE library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the
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* Free Software Foundation under the name GUILE. If you copy
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* code from other Free Software Foundation releases into a copy of
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* GUILE, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for GUILE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice. */
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/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
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gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
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#include "libguile/__scm.h"
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/*
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* C level hooks
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*/
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/*
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* The interface is designed for and- and or-type hooks which
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* both may want to indicate success/failure and return a result.
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*/
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typedef enum scm_c_hook_type_t {
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SCM_C_HOOK_NORMAL,
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SCM_C_HOOK_OR,
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SCM_C_HOOK_AND
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} scm_c_hook_type_t;
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typedef void *(*scm_c_hook_function_t) (void *hook_data,
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void *func_data,
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void *data);
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typedef struct scm_c_hook_entry_t {
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struct scm_c_hook_entry_t *next;
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scm_c_hook_function_t func;
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void *data;
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} scm_c_hook_entry_t;
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typedef struct scm_c_hook_t {
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scm_c_hook_entry_t *first;
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scm_c_hook_type_t type;
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void *data;
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} scm_c_hook_t;
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extern void scm_c_hook_init (scm_c_hook_t *hook,
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void *hook_data,
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scm_c_hook_type_t type);
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extern void scm_c_hook_add (scm_c_hook_t *hook,
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scm_c_hook_function_t func,
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void *func_data,
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int appendp);
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extern void scm_c_hook_remove (scm_c_hook_t *hook,
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scm_c_hook_function_t func,
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void *func_data);
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extern void *scm_c_hook_run (scm_c_hook_t *hook, void *data);
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/*
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* Scheme level hooks
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*/
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extern scm_bits_t scm_tc16_hook;
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#define SCM_HOOKP(x) SCM_TYP16_PREDICATE (scm_tc16_hook, x)
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#define SCM_HOOK_ARITY(hook) (SCM_CELL_WORD_0 (hook) >> 16)
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#define SCM_HOOK_PROCEDURES(hook) SCM_CELL_OBJECT_1 (hook)
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#define SCM_SET_HOOK_PROCEDURES(hook, procs) SCM_SET_CELL_OBJECT_1 ((hook), (procs))
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extern SCM scm_make_hook (SCM n_args);
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extern SCM scm_create_hook (const char* name, int n_args);
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extern SCM scm_hook_p (SCM x);
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extern SCM scm_hook_empty_p (SCM hook);
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extern SCM scm_add_hook_x (SCM hook, SCM thunk, SCM appendp);
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extern SCM scm_remove_hook_x (SCM hook, SCM thunk);
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extern SCM scm_reset_hook_x (SCM hook);
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extern SCM scm_run_hook (SCM hook, SCM args);
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extern void scm_c_run_hook (SCM hook, SCM args);
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extern SCM scm_hook_to_list (SCM hook);
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extern void scm_init_hooks (void);
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#endif /* SCM_HOOKS_H */
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/*
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Local Variables:
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c-file-style: "gnu"
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End:
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*/
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