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/* 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) 1991-2015 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 GCC. |
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GCC is free software; you can redistribute it and/or modify it under |
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the terms of the GNU General Public License as published by the Free |
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Software Foundation; either version 3, or (at your option) any later |
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version. |
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
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WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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for more details. |
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Under Section 7 of GPL version 3, you are granted additional |
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permissions described in the GCC Runtime Library Exception, version |
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3.1, as published by the Free Software Foundation. |
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You should have received a copy of the GNU General Public License and |
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a copy of the GCC Runtime Library Exception along with this program; |
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
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. */ |
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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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#ifndef GCC_GBL_CTORS_H |
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#define GCC_GBL_CTORS_H |
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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 needs to get invoked at program start time. */ |
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extern void __do_global_ctors (void); |
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/* Declare the routine which needs to get invoked at program exit time. */ |
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extern void __do_global_dtors (void); |
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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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__SIZE_TYPE__ nptrs = (__SIZE_TYPE__) __CTOR_LIST__[0]; \ |
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unsigned i; \ |
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if (nptrs == (__SIZE_TYPE__)-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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#endif /* GCC_GBL_CTORS_H */ |