/* Macros for using symbol sets for running lists of functions. Copyright (C) 1994, 1995 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU C 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef _SET_HOOKS_H #define __need_size_t #include <stddef.h> #include <sys/cdefs.h> /* Define a hook variable called NAME. Functions put on this hook take arguments described by PROTO. Use `text_set_element (NAME, FUNCTION)' from gnu-stabs.h to add a function to the hook. */ #define DEFINE_HOOK(NAME, PROTO) \ typedef void __##NAME##_hook_function_t PROTO; \ symbol_set_define (NAME) #define DECLARE_HOOK(NAME, PROTO) \ typedef void __##NAME##_hook_function_t PROTO;\ symbol_set_declare (NAME) /* Run all the functions hooked on the set called NAME. Each function is called like this: `function ARGS'. */ #define RUN_HOOK(NAME, ARGS) \ do { \ void *const *ptr; \ for (ptr = symbol_set_first_element (NAME); \ ! symbol_set_end_p (NAME, ptr); ++ptr) \ (*(__##NAME##_hook_function_t *) *ptr) ARGS; \ } while (0) /* Define a hook variable with NAME and PROTO, and a function called RUNNER which calls each function on the hook in turn, with ARGS. */ #define DEFINE_HOOK_RUNNER(name, runner, proto, args) \ DEFINE_HOOK (name, proto); void runner proto { RUN_HOOK (name, args); } #endif