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glibc-1.08.1
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set-hooks.h
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1994-04-04
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/* Macros for using symbol sets for running lists of functions.
Copyright (C) 1994 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) \
const struct \
{ \
size_t n; \
void (*fn[0]) __P (PROTO); \
} 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 { \
size_t i; \
for (i = 0; i < NAME.n; ++i) \
(*NAME.fn[i]) 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