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Diffstat (limited to 'libguile/chooks.h')
-rw-r--r-- | libguile/chooks.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/libguile/chooks.h b/libguile/chooks.h new file mode 100644 index 000000000..873c36fc3 --- /dev/null +++ b/libguile/chooks.h @@ -0,0 +1,79 @@ +/* classes: h_files */ + +#ifndef SCM_CHOOKS_H +#define SCM_CHOOKS_H + +/* Copyright (C) 1995-1996,1999,2000-2001,2006,2008-2009,2018 + * 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 3 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 *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 */ + +/* + Local Variables: + c-file-style: "gnu" + End: +*/ |