projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 53d0adda C |
1 | /* Definitions relating to the special __do_global_init function used |
| 2 | for getting g++ file-scope static objects constructed. This file | |
| 3 | will get included either by libgcc2.c (for systems that don't support | |
| 4 | a .init section) or by crtstuff.c (for those that do). | |
| 5 | ||
| 6 | Written by Ron Guilmette (rfg@ncd.com) | |
| 7 | ||
| 8 | Copyright (C) 1991 Free Software Foundation, Inc. | |
| 9 | ||
| 10 | This file is part of GNU CC. | |
| 11 | ||
| 12 | GNU CC is free software; you can redistribute it and/or modify | |
| 13 | it under the terms of the GNU General Public License as published by | |
| 14 | the Free Software Foundation; either version 2, or (at your option) | |
| 15 | any later version. | |
| 16 | ||
| 17 | GNU CC is distributed in the hope that it will be useful, | |
| 18 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 20 | GNU General Public License for more details. | |
| 21 | ||
| 22 | You should have received a copy of the GNU General Public License | |
| 23 | along with GNU CC; see the file COPYING. If not, write to | |
| 24 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
| 25 | ||
| 26 | /* This file contains definitions and declarations of things | |
| 27 | relating to the normal start-up-time invocation of C++ | |
| 28 | file-scope static object constructors. These declarations | |
| 29 | and definitions are used by *both* libgcc2.c and by crtstuff.c. | |
| 30 | ||
| 31 | Note that this file should only be compiled with GCC. | |
| 32 | */ | |
| 33 | ||
| 34 | #ifdef HAVE_ATEXIT | |
| 35 | extern void atexit (void (*) (void)); | |
| 36 | #define ON_EXIT(FUNC,ARG) atexit ((FUNC)) | |
| 37 | #else | |
| 38 | #ifdef sun | |
| 39 | extern void on_exit (void*, void*); | |
| 40 | #define ON_EXIT(FUNC,ARG) on_exit ((FUNC), (ARG)) | |
| 41 | #endif | |
| 42 | #endif | |
| 43 | ||
| 44 | /* Declare a pointer to void function type. */ | |
| 45 | ||
| 46 | typedef void (*func_ptr) (void); | |
| 47 | ||
| 48 | /* Declare the set of symbols use as begin and end markers for the lists | |
| 49 | of global object constructors and global object destructors. */ | |
| 50 | ||
| 51 | extern func_ptr __CTOR_LIST__[]; | |
| 52 | extern func_ptr __DTOR_LIST__[]; | |
| 53 | ||
| 54 | /* Declare the routine which need to get invoked at program exit time. */ | |
| 55 | ||
| 56 | extern void __do_global_dtors (); | |
| 57 | ||
| 58 | /* Define a macro with the code which needs to be executed at program | |
| 59 | start-up time. This macro is used in two places in crtstuff.c (for | |
| 60 | systems which support a .init section) and in one place in libgcc2.c | |
| 61 | (for those system which do *not* support a .init section). For all | |
| 62 | three places where this code might appear, it must be identical, so | |
| 63 | we define it once here as a macro to avoid various instances getting | |
| 64 | out-of-sync with one another. */ | |
| 65 | ||
| 66 | /* The first word may or may not contain the number of pointers in the table. | |
| 67 | In all cases, the table is null-terminated. | |
| 68 | We ignore the first word and scan up to the null. */ | |
| 69 | ||
| 70 | /* Some systems use a different strategy for finding the ctors. | |
| 71 | For example, svr3. */ | |
| 72 | #ifndef DO_GLOBAL_CTORS_BODY | |
| 73 | #define DO_GLOBAL_CTORS_BODY \ | |
| 74 | do { \ | |
| 75 | func_ptr *p; \ | |
| 76 | for (p = __CTOR_LIST__ + 1; *p; ) \ | |
| 77 | (*p++) (); \ | |
| 78 | } while (0) | |
| 79 | #endif | |
| 80 |