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From-SVN: r224
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Richard Stallman 1992-01-20 19:40:00 +00:00
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/* Definitions relating to the special __do_global_init function used
for getting g++ file-scope static objects constructed. This file
wil get included either by libgcc2.c (for systems that don't support
a .init section) or by crtstuff.c (for those that do).
Written by Ron Guilmette (rfg@ncd.com)
Copyright (C) 1991 Free Software Foundation, Inc.
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* This file contains definitions and declarations of things
relating to the normal start-up-time invocation of C++
file-scope static object constructors. These declarations
and definitions are used by *both* libgcc2.c and by crtstuff.c.
Note that this file should only be compiled with GCC.
*/
#ifdef sun
extern void on_exit (void*, void*);
#define ON_EXIT(FUNC,ARG) on_exit ((FUNC), (ARG))
#else
#ifdef HAVE_ATEXIT
extern void atexit (void (*) (void));
#define ON_EXIT(FUNC,ARG) atexit ((FUNC))
#endif
#endif
/* Declare a pointer to void function type. */
typedef void (*func_ptr) (void);
/* Declare the set of symbols use as begin and end markers for the lists
of global object constructors and global object descructors. */
extern func_ptr __CTOR_LIST__[];
extern func_ptr __DTOR_LIST__[];
/* Declare the routine which need to get invoked at program exit time. */
extern void __do_global_dtors ();
/* Define a macro with the code which needs to be executed at program
start-up time. This macro is used in two places in crtstuff.c (for
systems which support a .init section) and in one place in libgcc2.c
(for those system which do *not* support a .init section). For all
three places where this code might appear, it must be identical, so
we define it once here as a macro to avoid various instances getting
out-of-sync with one another. */
/* The first word may or may not contain the number of pointers in the table.
In all cases, the table is null-terminated.
We ignore the first word and scan up to the null. */
/* Some systems use a different strategy for finding the ctors.
For example, svr3. */
#ifndef DO_GLOBAL_CTORS_BODY
#define DO_GLOBAL_CTORS_BODY \
do { \
func_ptr *p; \
ON_EXIT (__do_global_dtors, 0); \
for (p = __CTOR_LIST__ + 1; *p; ) \
(*p++) (); \
} while (0)
#endif