/* Definitions relating to the special __do_global_init function used for getting g++ file-scope static objects constructed. This file will get included either by libgcc2.c (for systems that don't support a .init section) or by crtstuff.c (for those that do). Copyright (C) 1991, 1995, 1996, 1998, 1999, 2000 Free Software Foundation, Inc. Contributed by Ron Guilmette (rfg@segfault.us.com) This file is part of GCC. GCC 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. GCC 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 GCC; see the file COPYING. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 NEED_ATEXIT extern int atexit (void (*) (void)); #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 destructors. */ extern func_ptr __CTOR_LIST__[]; extern func_ptr __DTOR_LIST__[]; /* Declare the routine which needs to get invoked at program start time. */ extern void __do_global_ctors (void); /* Declare the routine which needs to get invoked at program exit time. */ extern void __do_global_dtors (void); /* 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. */ /* Some systems place the number of pointers in the first word of the table. On other systems, that word is -1. In all cases, the table is null-terminated. If the length is not recorded, count 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 { \ unsigned long nptrs = (unsigned long) __CTOR_LIST__[0]; \ unsigned i; \ if (nptrs == (unsigned long)-1) \ for (nptrs = 0; __CTOR_LIST__[nptrs + 1] != 0; nptrs++); \ for (i = nptrs; i >= 1; i--) \ __CTOR_LIST__[i] (); \ } while (0) #endif