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// Control various target specific ABI tweaks.  ARM version.

// Copyright (C) 2004, 2006, 2008, 2009, 2011 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

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// 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

// <http://www.gnu.org/licenses/>.

/** @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}

 */

#ifndef _CXXABI_TWEAKS_H

#define _CXXABI_TWEAKS_H 1

#ifdef __cplusplus

namespace __cxxabiv1

{

  extern "C"

  {

#endif

#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_BIT 1

#define _GLIBCXX_GUARD_PENDING_BIT __guard_test_bit (1, 1)

#define _GLIBCXX_GUARD_WAITING_BIT __guard_test_bit (2, 1)

  typedef int __guard;

  // We also want the element size in array cookies.

#define _GLIBCXX_ELTSIZE_IN_COOKIE 1

  // __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

#endif

#endif