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author | Roland McGrath <roland@gnu.org> | 1995-02-18 01:27:10 +0000 |
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committer | Roland McGrath <roland@gnu.org> | 1995-02-18 01:27:10 +0000 |
commit | 28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch) | |
tree | 15f07c4c43d635959c6afee96bde71fb1b3614ee /set-hooks.h | |
download | glibc-28f540f45bbacd939bfd07f213bcad2bf730b1bf.zip glibc-28f540f45bbacd939bfd07f213bcad2bf730b1bf.tar.gz glibc-28f540f45bbacd939bfd07f213bcad2bf730b1bf.tar.bz2 |
initial import
Diffstat (limited to 'set-hooks.h')
-rw-r--r-- | set-hooks.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/set-hooks.h b/set-hooks.h new file mode 100644 index 0000000..10d0b10 --- /dev/null +++ b/set-hooks.h @@ -0,0 +1,56 @@ +/* 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 |