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95 lines
3.3 KiB
C
95 lines
3.3 KiB
C
/* Definitions relating to the special __do_global_init function used
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for getting g++ file-scope static objects constructed. This file
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will get included either by libgcc2.c (for systems that don't support
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a .init section) or by crtstuff.c (for those that do).
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Copyright (C) 1991, 1995, 1996 Free Software Foundation, Inc.
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Contributed by Ron Guilmette (rfg@segfault.us.com)
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* This file contains definitions and declarations of things
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relating to the normal start-up-time invocation of C++
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file-scope static object constructors. These declarations
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and definitions are used by *both* libgcc2.c and by crtstuff.c.
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Note that this file should only be compiled with GCC.
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*/
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#ifdef NEED_ATEXIT
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#ifndef HAVE_ATEXIT
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#define HAVE_ATEXIT 1 /* Take it from libgcc2.c */
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#endif
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#endif
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#ifdef HAVE_ATEXIT
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#if defined (WINNT) || defined (NEED_ATEXIT)
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extern int atexit (void (*) (void));
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#else
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extern void atexit (void (*) (void));
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#endif
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#define ON_EXIT(FUNC,ARG) atexit ((FUNC))
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#else
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#ifdef sun
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extern int on_exit (void *, void *); /* The man page says it returns int. */
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#define ON_EXIT(FUNC,ARG) on_exit ((FUNC), (ARG))
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#endif
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#endif
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/* Declare a pointer to void function type. */
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typedef void (*func_ptr) (void);
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/* Declare the set of symbols use as begin and end markers for the lists
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of global object constructors and global object destructors. */
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extern func_ptr __CTOR_LIST__[];
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extern func_ptr __DTOR_LIST__[];
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/* Declare the routine which need to get invoked at program exit time. */
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extern void __do_global_dtors ();
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/* Define a macro with the code which needs to be executed at program
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start-up time. This macro is used in two places in crtstuff.c (for
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systems which support a .init section) and in one place in libgcc2.c
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(for those system which do *not* support a .init section). For all
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three places where this code might appear, it must be identical, so
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we define it once here as a macro to avoid various instances getting
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out-of-sync with one another. */
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/* Some systems place the number of pointers
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in the first word of the table.
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On other systems, that word is -1.
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In all cases, the table is null-terminated.
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If the length is not recorded, count up to the null. */
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/* Some systems use a different strategy for finding the ctors.
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For example, svr3. */
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#ifndef DO_GLOBAL_CTORS_BODY
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#define DO_GLOBAL_CTORS_BODY \
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do { \
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unsigned long nptrs = (unsigned long) __CTOR_LIST__[0]; \
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unsigned i; \
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if (nptrs == -1) \
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for (nptrs = 0; __CTOR_LIST__[nptrs + 1] != 0; nptrs++); \
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for (i = nptrs; i >= 1; i--) \
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__CTOR_LIST__[i] (); \
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} while (0)
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#endif
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