glibc/include/set-hooks.h
Andreas Jaeger 41bdb6e20c Update to LGPL v2.1.
2001-07-06  Paul Eggert  <eggert@twinsun.com>

	* manual/argp.texi: Remove ignored LGPL copyright notice; it's
	not appropriate for documentation anyway.
	* manual/libc-texinfo.sh: "Library General Public License" ->
	"Lesser General Public License".

2001-07-06  Andreas Jaeger  <aj@suse.de>

	* All files under GPL/LGPL version 2: Place under LGPL version
	2.1.
2001-07-06 04:58:11 +00:00

72 lines
2.4 KiB
C

/* Macros for using symbol sets for running lists of functions.
Copyright (C) 1994, 1995, 1997, 2000 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _SET_HOOKS_H
#define _SET_HOOKS_H 1
#define __need_size_t
#include <stddef.h>
#include <sys/cdefs.h>
#ifdef symbol_set_define
/* 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 *__unbounded 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); \
extern void runner proto; void runner proto { RUN_HOOK (name, args); }
#else
/* The system does not provide necessary support for this. */
# define DEFINE_HOOK(NAME, PROTO)
# define DECLARE_HOOK(NAME, PROTO)
# define RUN_HOOK(NAME, ARGS)
# define DEFINE_HOOK_RUNNER(name, runner, proto, args)
#endif
#endif /* set-hooks.h */