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// Control various target specific ABI tweaks. ARM version.
// Copyright (C) 2004-2021 Free Software Foundation, Inc.
// This file is part of the GNU ISO C++ Library. This library 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 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <>.
/** @file bits/cxxabi_tweaks.h
* This is an internal header file, included by other library headers.
* Do not attempt to use it directly. @headername{cxxabi.h}
#define _CXXABI_TWEAKS_H 1
#ifdef __cplusplus
namespace __cxxabiv1
extern "C"
#ifdef __ARM_EABI__
// The ARM EABI uses the least significant bit of a 32-bit
// guard variable.
#define _GLIBCXX_GUARD_TEST(x) ((*(x) & 1) != 0)
#define _GLIBCXX_GUARD_SET(x) *(x) = 1
#define _GLIBCXX_GUARD_PENDING_BIT __guard_test_bit (1, 1)
#define _GLIBCXX_GUARD_WAITING_BIT __guard_test_bit (2, 1)
typedef int __guard;
((__atomic_load_n(x, __ATOMIC_ACQUIRE) & 1) != 0)
__atomic_store_n(x, 1, __ATOMIC_RELEASE)
// We also want the element size in array cookies.
// __cxa_vec_ctor should return a pointer to the array.
typedef void * __cxa_vec_ctor_return_type;
#define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return x
// Constructors and destructors return the "this" pointer.
typedef void * __cxa_cdtor_return_type;
#else // __ARM_EABI__
// The generic ABI uses the first byte of a 64-bit guard variable.
#define _GLIBCXX_GUARD_TEST(x) (*(char *) (x) != 0)
#define _GLIBCXX_GUARD_SET(x) *(char *) (x) = 1
#define _GLIBCXX_GUARD_BIT __guard_test_bit (0, 1)
#define _GLIBCXX_GUARD_PENDING_BIT __guard_test_bit (1, 1)
#define _GLIBCXX_GUARD_WAITING_BIT __guard_test_bit (2, 1)
__extension__ typedef int __guard __attribute__((mode (__DI__)));
// __cxa_vec_ctor has void return type.
typedef void __cxa_vec_ctor_return_type;
#define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return
// Constructors and destructors do not return a value.
typedef void __cxa_cdtor_return_type;
#endif //!__ARM_EABI__
#ifdef __cplusplus
} // namespace __cxxabiv1