| 1 | // Control various target specific ABI tweaks. Generic version. |
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| 2 | |
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| 3 | // Copyright (C) 2004-2021 Free Software Foundation, Inc. |
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| 4 | // |
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| 5 | // This file is part of the GNU ISO C++ Library. This library is free |
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| 6 | // software; you can redistribute it and/or modify it under the |
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| 7 | // terms of the GNU General Public License as published by the |
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| 8 | // Free Software Foundation; either version 3, or (at your option) |
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| 9 | // any later version. |
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| 10 | |
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| 11 | // This library is distributed in the hope that it will be useful, |
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| 12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | // GNU General Public License for more details. |
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| 15 | |
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| 16 | // Under Section 7 of GPL version 3, you are granted additional |
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| 17 | // permissions described in the GCC Runtime Library Exception, version |
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| 18 | // 3.1, as published by the Free Software Foundation. |
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| 19 | |
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| 20 | // You should have received a copy of the GNU General Public License and |
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| 21 | // a copy of the GCC Runtime Library Exception along with this program; |
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| 22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
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| 23 | // <http://www.gnu.org/licenses/>. |
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| 24 | |
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| 25 | /** @file bits/cxxabi_tweaks.h |
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| 26 | * This is an internal header file, included by other library headers. |
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| 27 | * Do not attempt to use it directly. @headername{cxxabi.h} |
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| 28 | */ |
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| 29 | |
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| 30 | #ifndef _CXXABI_TWEAKS_H |
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| 31 | #define _CXXABI_TWEAKS_H 1 |
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| 32 | |
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| 33 | #ifdef __cplusplus |
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| 34 | namespace __cxxabiv1 |
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| 35 | { |
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| 36 | extern "C" |
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| 37 | { |
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| 38 | #endif |
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| 39 | |
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| 40 | // The generic ABI uses the first byte of a 64-bit guard variable. |
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| 41 | #define _GLIBCXX_GUARD_TEST(x) (*(char *) (x) != 0) |
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| 42 | #define _GLIBCXX_GUARD_SET(x) *(char *) (x) = 1 |
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| 43 | #define _GLIBCXX_GUARD_BIT __guard_test_bit (0, 1) |
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| 44 | #define _GLIBCXX_GUARD_PENDING_BIT __guard_test_bit (1, 1) |
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| 45 | #define _GLIBCXX_GUARD_WAITING_BIT __guard_test_bit (2, 1) |
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| 46 | __extension__ typedef int __guard __attribute__((mode (__DI__))); |
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| 47 | |
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| 48 | // __cxa_vec_ctor has void return type. |
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| 49 | typedef void __cxa_vec_ctor_return_type; |
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| 50 | #define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return |
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| 51 | // Constructors and destructors do not return a value. |
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| 52 | typedef void __cxa_cdtor_return_type; |
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| 53 | |
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| 54 | #ifdef __cplusplus |
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| 55 | } |
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| 56 | } // namespace __cxxabiv1 |
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| 57 | #endif |
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| 58 | |
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| 59 | #endif |
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| 60 | |
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