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// -*- C++ -*- header.

// -*- C++ -*- header.

// Copyright (C) 2008, 2009, 2010, 2011 Free Software Foundation, Inc.

// Copyright (C) 2008, 2009, 2010, 2011 Free Software Foundation, Inc.

//

//

// This file is part of the GNU ISO C++ Library.  This library is free

// 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

// software; you can redistribute it and/or modify it under the

// terms of the GNU General Public License as published by the

// terms of the GNU General Public License as published by the

// Free Software Foundation; either version 3, or (at your option)

// Free Software Foundation; either version 3, or (at your option)

// any later version.

// any later version.

// This library is distributed in the hope that it will be useful,

// This library is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// but WITHOUT ANY WARRANTY; without even the implied warranty of

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

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

// GNU General Public License for more details.

// GNU General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional

// Under Section 7 of GPL version 3, you are granted additional

// permissions described in the GCC Runtime Library Exception, version

// permissions described in the GCC Runtime Library Exception, version

// 3.1, as published by the Free Software Foundation.

// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and

// 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;

// a copy of the GCC Runtime Library Exception along with this program;

// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

// .

// .

// ????????????????????????????????????????????????????????????????????

// ????????????????????????????????????????????????????????????????????

//

//

// This is a copy of the libstdc++ header, with the trivial modification

// This is a copy of the libstdc++ header, with the trivial modification

// of ignoring the c++config.h include.  If and when the top-level build is

// of ignoring the c++config.h include.  If and when the top-level build is

// fixed so that target libraries can be built using the newly built, we can

// fixed so that target libraries can be built using the newly built, we can

// delete this file.

// delete this file.

//

//

// ????????????????????????????????????????????????????????????????????

// ????????????????????????????????????????????????????????????????????

/** @file include/atomic

/** @file include/atomic

 *  This is a Standard C++ Library header.

 *  This is a Standard C++ Library header.

 */

 */

// Based on "C++ Atomic Types and Operations" by Hans Boehm and Lawrence Crowl.

// Based on "C++ Atomic Types and Operations" by Hans Boehm and Lawrence Crowl.

// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2427.html

// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2427.html

#ifndef _GLIBCXX_ATOMIC

#ifndef _GLIBCXX_ATOMIC

#define _GLIBCXX_ATOMIC 1

#define _GLIBCXX_ATOMIC 1

// #pragma GCC system_header

// #pragma GCC system_header

// #ifndef __GXX_EXPERIMENTAL_CXX0X__

// #ifndef __GXX_EXPERIMENTAL_CXX0X__

// # include 

// # include 

// #endif

// #endif

// #include 

// #include 

namespace std // _GLIBCXX_VISIBILITY(default)

namespace std // _GLIBCXX_VISIBILITY(default)

{

{

// _GLIBCXX_BEGIN_NAMESPACE_VERSION

// _GLIBCXX_BEGIN_NAMESPACE_VERSION

  /**

  /**

   * @defgroup atomics Atomics

   * @defgroup atomics Atomics

   *

   *

   * Components for performing atomic operations.

   * Components for performing atomic operations.

   * @{

   * @{

   */

   */

  /// Enumeration for memory_order

  /// Enumeration for memory_order

  typedef enum memory_order

  typedef enum memory_order

    {

    {

      memory_order_relaxed,

      memory_order_relaxed,

      memory_order_consume,

      memory_order_consume,

      memory_order_acquire,

      memory_order_acquire,

      memory_order_release,

      memory_order_release,

      memory_order_acq_rel,

      memory_order_acq_rel,

      memory_order_seq_cst

      memory_order_seq_cst

    } memory_order;

    } memory_order;

  inline memory_order

  inline memory_order

  __calculate_memory_order(memory_order __m) noexcept

  __calculate_memory_order(memory_order __m) noexcept

  {

  {

    const bool __cond1 = __m == memory_order_release;

    const bool __cond1 = __m == memory_order_release;

    const bool __cond2 = __m == memory_order_acq_rel;

    const bool __cond2 = __m == memory_order_acq_rel;

    memory_order __mo1(__cond1 ? memory_order_relaxed : __m);

    memory_order __mo1(__cond1 ? memory_order_relaxed : __m);

    memory_order __mo2(__cond2 ? memory_order_acquire : __mo1);

    memory_order __mo2(__cond2 ? memory_order_acquire : __mo1);

    return __mo2;

    return __mo2;

  }

  }

  inline void

  inline void

  atomic_thread_fence(memory_order __m) noexcept

  atomic_thread_fence(memory_order __m) noexcept

  {

  {

    __atomic_thread_fence (__m);

    __atomic_thread_fence (__m);

  }

  }

  inline void

  inline void

  atomic_signal_fence(memory_order __m) noexcept

  atomic_signal_fence(memory_order __m) noexcept

  {

  {

    __atomic_thread_fence (__m);

    __atomic_thread_fence (__m);

  }

  }

  /// kill_dependency

  /// kill_dependency

  template

  template

    inline _Tp

    inline _Tp

    kill_dependency(_Tp __y) noexcept

    kill_dependency(_Tp __y) noexcept

    {

    {

      _Tp __ret(__y);

      _Tp __ret(__y);

      return __ret;

      return __ret;

    }

    }

  /// Lock-free Property

  /// Lock-free Property

#define ATOMIC_BOOL_LOCK_FREE           __GCC_ATOMIC_BOOL_LOCK_FREE

#define ATOMIC_BOOL_LOCK_FREE           __GCC_ATOMIC_BOOL_LOCK_FREE

#define ATOMIC_CHAR_LOCK_FREE           __GCC_ATOMIC_CHAR_LOCK_FREE

#define ATOMIC_CHAR_LOCK_FREE           __GCC_ATOMIC_CHAR_LOCK_FREE

#define ATOMIC_WCHAR_T_LOCK_FREE        __GCC_ATOMIC_WCHAR_T_LOCK_FREE

#define ATOMIC_WCHAR_T_LOCK_FREE        __GCC_ATOMIC_WCHAR_T_LOCK_FREE

#define ATOMIC_CHAR16_T_LOCK_FREE       __GCC_ATOMIC_CHAR16_T_LOCK_FREE

#define ATOMIC_CHAR16_T_LOCK_FREE       __GCC_ATOMIC_CHAR16_T_LOCK_FREE

#define ATOMIC_CHAR32_T_LOCK_FREE       __GCC_ATOMIC_CHAR32_T_LOCK_FREE

#define ATOMIC_CHAR32_T_LOCK_FREE       __GCC_ATOMIC_CHAR32_T_LOCK_FREE

#define ATOMIC_SHORT_LOCK_FREE          __GCC_ATOMIC_SHORT_LOCK_FREE

#define ATOMIC_SHORT_LOCK_FREE          __GCC_ATOMIC_SHORT_LOCK_FREE

#define ATOMIC_INT_LOCK_FREE            __GCC_ATOMIC_INT_LOCK_FREE

#define ATOMIC_INT_LOCK_FREE            __GCC_ATOMIC_INT_LOCK_FREE

#define ATOMIC_LONG_LOCK_FREE           __GCC_ATOMIC_LONG_LOCK_FREE

#define ATOMIC_LONG_LOCK_FREE           __GCC_ATOMIC_LONG_LOCK_FREE

#define ATOMIC_LLONG_LOCK_FREE          __GCC_ATOMIC_LLONG_LOCK_FREE

#define ATOMIC_LLONG_LOCK_FREE          __GCC_ATOMIC_LLONG_LOCK_FREE

#define ATOMIC_POINTER_LOCK_FREE        __GCC_ATOMIC_POINTER_LOCK_FREE

#define ATOMIC_POINTER_LOCK_FREE        __GCC_ATOMIC_POINTER_LOCK_FREE

  // Base types for atomics.

  // Base types for atomics.

  template

  template

    struct __atomic_base;

    struct __atomic_base;

  /// atomic_char

  /// atomic_char

  typedef __atomic_base                         atomic_char;

  typedef __atomic_base                         atomic_char;

  /// atomic_schar

  /// atomic_schar

  typedef __atomic_base         atomic_schar;

  typedef __atomic_base         atomic_schar;

  /// atomic_uchar

  /// atomic_uchar

  typedef __atomic_base         atomic_uchar;

  typedef __atomic_base         atomic_uchar;

  /// atomic_short

  /// atomic_short

  typedef __atomic_base                 atomic_short;

  typedef __atomic_base                 atomic_short;

  /// atomic_ushort

  /// atomic_ushort

  typedef __atomic_base         atomic_ushort;

  typedef __atomic_base         atomic_ushort;

  /// atomic_int

  /// atomic_int

  typedef __atomic_base                         atomic_int;

  typedef __atomic_base                         atomic_int;

  /// atomic_uint

  /// atomic_uint

  typedef __atomic_base         atomic_uint;

  typedef __atomic_base         atomic_uint;

  /// atomic_long

  /// atomic_long

  typedef __atomic_base                         atomic_long;

  typedef __atomic_base                         atomic_long;

  /// atomic_ulong

  /// atomic_ulong

  typedef __atomic_base         atomic_ulong;

  typedef __atomic_base         atomic_ulong;

  /// atomic_llong

  /// atomic_llong

  typedef __atomic_base                 atomic_llong;

  typedef __atomic_base                 atomic_llong;

  /// atomic_ullong

  /// atomic_ullong

  typedef __atomic_base         atomic_ullong;

  typedef __atomic_base         atomic_ullong;

  /// atomic_wchar_t

  /// atomic_wchar_t

  typedef __atomic_base                 atomic_wchar_t;

  typedef __atomic_base                 atomic_wchar_t;

  /// atomic_char16_t

  /// atomic_char16_t

  typedef __atomic_base                 atomic_char16_t;

  typedef __atomic_base                 atomic_char16_t;

  /// atomic_char32_t

  /// atomic_char32_t

  typedef __atomic_base                 atomic_char32_t;

  typedef __atomic_base                 atomic_char32_t;

  /// atomic_char32_t

  /// atomic_char32_t

  typedef __atomic_base                 atomic_char32_t;

  typedef __atomic_base                 atomic_char32_t;

  /// atomic_int_least8_t

  /// atomic_int_least8_t

  typedef __atomic_base                 atomic_int_least8_t;

  typedef __atomic_base                 atomic_int_least8_t;

  /// atomic_uint_least8_t

  /// atomic_uint_least8_t

  typedef __atomic_base         atomic_uint_least8_t;

  typedef __atomic_base         atomic_uint_least8_t;

  /// atomic_int_least16_t

  /// atomic_int_least16_t

  typedef __atomic_base         atomic_int_least16_t;

  typedef __atomic_base         atomic_int_least16_t;

  /// atomic_uint_least16_t

  /// atomic_uint_least16_t

  typedef __atomic_base         atomic_uint_least16_t;

  typedef __atomic_base         atomic_uint_least16_t;

  /// atomic_int_least32_t

  /// atomic_int_least32_t

  typedef __atomic_base         atomic_int_least32_t;

  typedef __atomic_base         atomic_int_least32_t;

  /// atomic_uint_least32_t

  /// atomic_uint_least32_t

  typedef __atomic_base         atomic_uint_least32_t;

  typedef __atomic_base         atomic_uint_least32_t;

  /// atomic_int_least64_t

  /// atomic_int_least64_t

  typedef __atomic_base         atomic_int_least64_t;

  typedef __atomic_base         atomic_int_least64_t;

  /// atomic_uint_least64_t

  /// atomic_uint_least64_t

  typedef __atomic_base         atomic_uint_least64_t;

  typedef __atomic_base         atomic_uint_least64_t;

  /// atomic_int_fast8_t

  /// atomic_int_fast8_t

  typedef __atomic_base                 atomic_int_fast8_t;

  typedef __atomic_base                 atomic_int_fast8_t;

  /// atomic_uint_fast8_t

  /// atomic_uint_fast8_t

  typedef __atomic_base         atomic_uint_fast8_t;

  typedef __atomic_base         atomic_uint_fast8_t;

  /// atomic_int_fast16_t

  /// atomic_int_fast16_t

  typedef __atomic_base         atomic_int_fast16_t;

  typedef __atomic_base         atomic_int_fast16_t;

  /// atomic_uint_fast16_t

  /// atomic_uint_fast16_t

  typedef __atomic_base         atomic_uint_fast16_t;

  typedef __atomic_base         atomic_uint_fast16_t;

  /// atomic_int_fast32_t

  /// atomic_int_fast32_t

  typedef __atomic_base         atomic_int_fast32_t;

  typedef __atomic_base         atomic_int_fast32_t;

  /// atomic_uint_fast32_t

  /// atomic_uint_fast32_t

  typedef __atomic_base         atomic_uint_fast32_t;

  typedef __atomic_base         atomic_uint_fast32_t;

  /// atomic_int_fast64_t

  /// atomic_int_fast64_t

  typedef __atomic_base         atomic_int_fast64_t;

  typedef __atomic_base         atomic_int_fast64_t;

  /// atomic_uint_fast64_t

  /// atomic_uint_fast64_t

  typedef __atomic_base         atomic_uint_fast64_t;

  typedef __atomic_base         atomic_uint_fast64_t;

  /// atomic_intptr_t

  /// atomic_intptr_t

  typedef __atomic_base                 atomic_intptr_t;

  typedef __atomic_base                 atomic_intptr_t;

  /// atomic_uintptr_t

  /// atomic_uintptr_t

  typedef __atomic_base                 atomic_uintptr_t;

  typedef __atomic_base                 atomic_uintptr_t;

  /// atomic_size_t

  /// atomic_size_t

  typedef __atomic_base                 atomic_size_t;

  typedef __atomic_base                 atomic_size_t;

  /// atomic_intmax_t

  /// atomic_intmax_t

  typedef __atomic_base                 atomic_intmax_t;

  typedef __atomic_base                 atomic_intmax_t;

  /// atomic_uintmax_t

  /// atomic_uintmax_t

  typedef __atomic_base                 atomic_uintmax_t;

  typedef __atomic_base                 atomic_uintmax_t;

  /// atomic_ptrdiff_t

  /// atomic_ptrdiff_t

  typedef __atomic_base                 atomic_ptrdiff_t;

  typedef __atomic_base                 atomic_ptrdiff_t;

#define ATOMIC_VAR_INIT(_VI) { _VI }

#define ATOMIC_VAR_INIT(_VI) { _VI }

  template

  template

    struct atomic;

    struct atomic;

  template

  template

    struct atomic<_Tp*>;

    struct atomic<_Tp*>;

  /**

  /**

   *  @brief Base type for atomic_flag.

   *  @brief Base type for atomic_flag.

   *

   *

   *  Base type is POD with data, allowing atomic_flag to derive from

   *  Base type is POD with data, allowing atomic_flag to derive from

   *  it and meet the standard layout type requirement. In addition to

   *  it and meet the standard layout type requirement. In addition to

   *  compatibilty with a C interface, this allows different

   *  compatibilty with a C interface, this allows different

   *  implementations of atomic_flag to use the same atomic operation

   *  implementations of atomic_flag to use the same atomic operation

   *  functions, via a standard conversion to the __atomic_flag_base

   *  functions, via a standard conversion to the __atomic_flag_base

   *  argument.

   *  argument.

  */

  */

  // _GLIBCXX_BEGIN_EXTERN_C

  // _GLIBCXX_BEGIN_EXTERN_C

  struct __atomic_flag_base

  struct __atomic_flag_base

  {

  {

    bool _M_i;

    bool _M_i;

  };

  };

  // _GLIBCXX_END_EXTERN_C

  // _GLIBCXX_END_EXTERN_C

#define ATOMIC_FLAG_INIT { false }

#define ATOMIC_FLAG_INIT { false }

  /// atomic_flag

  /// atomic_flag

  struct atomic_flag : public __atomic_flag_base

  struct atomic_flag : public __atomic_flag_base

  {

  {

    atomic_flag() noexcept = default;

    atomic_flag() noexcept = default;

    ~atomic_flag() noexcept = default;

    ~atomic_flag() noexcept = default;

    atomic_flag(const atomic_flag&) = delete;

    atomic_flag(const atomic_flag&) = delete;

    atomic_flag& operator=(const atomic_flag&) = delete;

    atomic_flag& operator=(const atomic_flag&) = delete;

    atomic_flag& operator=(const atomic_flag&) volatile = delete;

    atomic_flag& operator=(const atomic_flag&) volatile = delete;

    // Conversion to ATOMIC_FLAG_INIT.

    // Conversion to ATOMIC_FLAG_INIT.

    atomic_flag(bool __i) noexcept : __atomic_flag_base({ __i }) { }

    atomic_flag(bool __i) noexcept : __atomic_flag_base({ __i }) { }

    bool

    bool

    test_and_set(memory_order __m = memory_order_seq_cst) noexcept

    test_and_set(memory_order __m = memory_order_seq_cst) noexcept

    {

    {

      return __atomic_test_and_set (&_M_i, __m);

      return __atomic_test_and_set (&_M_i, __m);

    }

    }

    bool

    bool

    test_and_set(memory_order __m = memory_order_seq_cst) volatile noexcept

    test_and_set(memory_order __m = memory_order_seq_cst) volatile noexcept

    {

    {

      return __atomic_test_and_set (&_M_i, __m);

      return __atomic_test_and_set (&_M_i, __m);

    }

    }

    void

    void

    clear(memory_order __m = memory_order_seq_cst) noexcept

    clear(memory_order __m = memory_order_seq_cst) noexcept

    {

    {

      // __glibcxx_assert(__m != memory_order_consume);

      // __glibcxx_assert(__m != memory_order_consume);

      // __glibcxx_assert(__m != memory_order_acquire);

      // __glibcxx_assert(__m != memory_order_acquire);

      // __glibcxx_assert(__m != memory_order_acq_rel);

      // __glibcxx_assert(__m != memory_order_acq_rel);

      __atomic_clear (&_M_i, __m);

      __atomic_clear (&_M_i, __m);

    }

    }

    void

    void

    clear(memory_order __m = memory_order_seq_cst) volatile noexcept

    clear(memory_order __m = memory_order_seq_cst) volatile noexcept

    {

    {

      // __glibcxx_assert(__m != memory_order_consume);

      // __glibcxx_assert(__m != memory_order_consume);

      // __glibcxx_assert(__m != memory_order_acquire);

      // __glibcxx_assert(__m != memory_order_acquire);

      // __glibcxx_assert(__m != memory_order_acq_rel);

      // __glibcxx_assert(__m != memory_order_acq_rel);

      __atomic_clear (&_M_i, __m);

      __atomic_clear (&_M_i, __m);

    }

    }

  };

  };

  /// Base class for atomic integrals.

  /// Base class for atomic integrals.

  //

  //

  // For each of the integral types, define atomic_[integral type] struct

  // For each of the integral types, define atomic_[integral type] struct

  //

  //

  // atomic_bool     bool

  // atomic_bool     bool

  // atomic_char     char

  // atomic_char     char

  // atomic_schar    signed char

  // atomic_schar    signed char

  // atomic_uchar    unsigned char

  // atomic_uchar    unsigned char

  // atomic_short    short

  // atomic_short    short

  // atomic_ushort   unsigned short

  // atomic_ushort   unsigned short

  // atomic_int      int

  // atomic_int      int

  // atomic_uint     unsigned int

  // atomic_uint     unsigned int

  // atomic_long     long

  // atomic_long     long

  // atomic_ulong    unsigned long

  // atomic_ulong    unsigned long

  // atomic_llong    long long

  // atomic_llong    long long

  // atomic_ullong   unsigned long long

  // atomic_ullong   unsigned long long

  // atomic_char16_t char16_t

  // atomic_char16_t char16_t

  // atomic_char32_t char32_t

  // atomic_char32_t char32_t

  // atomic_wchar_t  wchar_t

  // atomic_wchar_t  wchar_t

  //

  //

  // NB: Assuming _ITp is an integral scalar type that is 1, 2, 4, or

  // NB: Assuming _ITp is an integral scalar type that is 1, 2, 4, or

  // 8 bytes, since that is what GCC built-in functions for atomic

  // 8 bytes, since that is what GCC built-in functions for atomic

  // memory access expect.

  // memory access expect.

  template

  template

    struct __atomic_base

    struct __atomic_base

    {

    {

    private:

    private:

      typedef _ITp      __int_type;

      typedef _ITp      __int_type;

      __int_type        _M_i;

      __int_type        _M_i;

    public:

    public:

      __atomic_base() noexcept = default;

      __atomic_base() noexcept = default;

      ~__atomic_base() noexcept = default;

      ~__atomic_base() noexcept = default;

      __atomic_base(const __atomic_base&) = delete;

      __atomic_base(const __atomic_base&) = delete;

      __atomic_base& operator=(const __atomic_base&) = delete;

      __atomic_base& operator=(const __atomic_base&) = delete;

      __atomic_base& operator=(const __atomic_base&) volatile = delete;

      __atomic_base& operator=(const __atomic_base&) volatile = delete;

      // Requires __int_type convertible to _M_i.

      // Requires __int_type convertible to _M_i.

      constexpr __atomic_base(__int_type __i) noexcept : _M_i (__i) { }

      constexpr __atomic_base(__int_type __i) noexcept : _M_i (__i) { }

      operator __int_type() const noexcept

      operator __int_type() const noexcept

      { return load(); }

      { return load(); }

      operator __int_type() const volatile noexcept

      operator __int_type() const volatile noexcept

      { return load(); }

      { return load(); }

      __int_type

      __int_type

      operator=(__int_type __i) noexcept

      operator=(__int_type __i) noexcept

      {

      {

        store(__i);

        store(__i);

        return __i;

        return __i;

      }

      }

      __int_type

      __int_type

      operator=(__int_type __i) volatile noexcept

      operator=(__int_type __i) volatile noexcept

      {

      {

        store(__i);

        store(__i);

        return __i;

        return __i;

      }

      }

      __int_type

      __int_type

      operator++(int) noexcept

      operator++(int) noexcept

      { return fetch_add(1); }

      { return fetch_add(1); }

      __int_type

      __int_type

      operator++(int) volatile noexcept

      operator++(int) volatile noexcept

      { return fetch_add(1); }

      { return fetch_add(1); }

      __int_type

      __int_type

      operator--(int) noexcept

      operator--(int) noexcept

      { return fetch_sub(1); }

      { return fetch_sub(1); }

      __int_type

      __int_type

      operator--(int) volatile noexcept

      operator--(int) volatile noexcept

      { return fetch_sub(1); }

      { return fetch_sub(1); }

      __int_type

      __int_type

      operator++() noexcept

      operator++() noexcept

      { return __atomic_add_fetch(&_M_i, 1, memory_order_seq_cst); }

      { return __atomic_add_fetch(&_M_i, 1, memory_order_seq_cst); }

      __int_type

      __int_type

      operator++() volatile noexcept

      operator++() volatile noexcept

      { return __atomic_add_fetch(&_M_i, 1, memory_order_seq_cst); }

      { return __atomic_add_fetch(&_M_i, 1, memory_order_seq_cst); }

      __int_type

      __int_type

      operator--() noexcept

      operator--() noexcept

      { return __atomic_sub_fetch(&_M_i, 1, memory_order_seq_cst); }

      { return __atomic_sub_fetch(&_M_i, 1, memory_order_seq_cst); }

      __int_type

      __int_type

      operator--() volatile noexcept

      operator--() volatile noexcept

      { return __atomic_sub_fetch(&_M_i, 1, memory_order_seq_cst); }

      { return __atomic_sub_fetch(&_M_i, 1, memory_order_seq_cst); }

      __int_type

      __int_type

      operator+=(__int_type __i) noexcept

      operator+=(__int_type __i) noexcept

      { return __atomic_add_fetch(&_M_i, __i, memory_order_seq_cst); }

      { return __atomic_add_fetch(&_M_i, __i, memory_order_seq_cst); }

      __int_type

      __int_type

      operator+=(__int_type __i) volatile noexcept

      operator+=(__int_type __i) volatile noexcept

      { return __atomic_add_fetch(&_M_i, __i, memory_order_seq_cst); }

      { return __atomic_add_fetch(&_M_i, __i, memory_order_seq_cst); }

      __int_type

      __int_type

      operator-=(__int_type __i) noexcept

      operator-=(__int_type __i) noexcept

      { return __atomic_sub_fetch(&_M_i, __i, memory_order_seq_cst); }

      { return __atomic_sub_fetch(&_M_i, __i, memory_order_seq_cst); }

      __int_type

      __int_type

      operator-=(__int_type __i) volatile noexcept

      operator-=(__int_type __i) volatile noexcept

      { return __atomic_sub_fetch(&_M_i, __i, memory_order_seq_cst); }

      { return __atomic_sub_fetch(&_M_i, __i, memory_order_seq_cst); }

      __int_type

      __int_type

      operator&=(__int_type __i) noexcept

      operator&=(__int_type __i) noexcept

      { return __atomic_and_fetch(&_M_i, __i, memory_order_seq_cst); }

      { return __atomic_and_fetch(&_M_i, __i, memory_order_seq_cst); }

      __int_type

      __int_type

      operator&=(__int_type __i) volatile noexcept

      operator&=(__int_type __i) volatile noexcept

      { return __atomic_and_fetch(&_M_i, __i, memory_order_seq_cst); }

      { return __atomic_and_fetch(&_M_i, __i, memory_order_seq_cst); }

      __int_type

      __int_type

      operator|=(__int_type __i) noexcept

      operator|=(__int_type __i) noexcept

      { return __atomic_or_fetch(&_M_i, __i, memory_order_seq_cst); }

      { return __atomic_or_fetch(&_M_i, __i, memory_order_seq_cst); }

      __int_type

      __int_type

      operator|=(__int_type __i) volatile noexcept

      operator|=(__int_type __i) volatile noexcept

      { return __atomic_or_fetch(&_M_i, __i, memory_order_seq_cst); }

      { return __atomic_or_fetch(&_M_i, __i, memory_order_seq_cst); }

      __int_type

      __int_type

      operator^=(__int_type __i) noexcept

      operator^=(__int_type __i) noexcept

      { return __atomic_xor_fetch(&_M_i, __i, memory_order_seq_cst); }

      { return __atomic_xor_fetch(&_M_i, __i, memory_order_seq_cst); }

      __int_type

      __int_type

      operator^=(__int_type __i) volatile noexcept

      operator^=(__int_type __i) volatile noexcept

      { return __atomic_xor_fetch(&_M_i, __i, memory_order_seq_cst); }

      { return __atomic_xor_fetch(&_M_i, __i, memory_order_seq_cst); }

      bool

      bool

      is_lock_free() const noexcept

      is_lock_free() const noexcept

      { return __atomic_is_lock_free (sizeof (_M_i), &_M_i); }

      { return __atomic_is_lock_free (sizeof (_M_i), &_M_i); }

      bool

      bool

      is_lock_free() const volatile noexcept

      is_lock_free() const volatile noexcept

      { return __atomic_is_lock_free (sizeof (_M_i), &_M_i); }

      { return __atomic_is_lock_free (sizeof (_M_i), &_M_i); }

      void

      void

      store(__int_type __i, memory_order __m = memory_order_seq_cst) noexcept

      store(__int_type __i, memory_order __m = memory_order_seq_cst) noexcept

      {

      {

        // __glibcxx_assert(__m != memory_order_acquire);

        // __glibcxx_assert(__m != memory_order_acquire);

        // __glibcxx_assert(__m != memory_order_acq_rel);

        // __glibcxx_assert(__m != memory_order_acq_rel);

        // __glibcxx_assert(__m != memory_order_consume);

        // __glibcxx_assert(__m != memory_order_consume);

        __atomic_store_n(&_M_i, __i, __m);

        __atomic_store_n(&_M_i, __i, __m);

      }

      }

      void

      void

      store(__int_type __i,

      store(__int_type __i,

            memory_order __m = memory_order_seq_cst) volatile noexcept

            memory_order __m = memory_order_seq_cst) volatile noexcept

      {

      {

        // __glibcxx_assert(__m != memory_order_acquire);

        // __glibcxx_assert(__m != memory_order_acquire);

        // __glibcxx_assert(__m != memory_order_acq_rel);

        // __glibcxx_assert(__m != memory_order_acq_rel);

        // __glibcxx_assert(__m != memory_order_consume);

        // __glibcxx_assert(__m != memory_order_consume);

        __atomic_store_n(&_M_i, __i, __m);

        __atomic_store_n(&_M_i, __i, __m);

      }

      }

      __int_type

      __int_type

      load(memory_order __m = memory_order_seq_cst) const noexcept

      load(memory_order __m = memory_order_seq_cst) const noexcept

      {

      {

        // __glibcxx_assert(__m != memory_order_release);

        // __glibcxx_assert(__m != memory_order_release);

        // __glibcxx_assert(__m != memory_order_acq_rel);

        // __glibcxx_assert(__m != memory_order_acq_rel);

        return __atomic_load_n(&_M_i, __m);

        return __atomic_load_n(&_M_i, __m);

      }

      }

      __int_type

      __int_type

      load(memory_order __m = memory_order_seq_cst) const volatile noexcept

      load(memory_order __m = memory_order_seq_cst) const volatile noexcept

      {

      {

        // __glibcxx_assert(__m != memory_order_release);

        // __glibcxx_assert(__m != memory_order_release);

        // __glibcxx_assert(__m != memory_order_acq_rel);

        // __glibcxx_assert(__m != memory_order_acq_rel);

        return __atomic_load_n(&_M_i, __m);

        return __atomic_load_n(&_M_i, __m);

      }

      }

      __int_type

      __int_type

      exchange(__int_type __i,

      exchange(__int_type __i,

               memory_order __m = memory_order_seq_cst) noexcept

               memory_order __m = memory_order_seq_cst) noexcept

      {

      {

        return __atomic_exchange_n(&_M_i, __i, __m);

        return __atomic_exchange_n(&_M_i, __i, __m);

      }

      }

      __int_type

      __int_type

      exchange(__int_type __i,

      exchange(__int_type __i,

               memory_order __m = memory_order_seq_cst) volatile noexcept

               memory_order __m = memory_order_seq_cst) volatile noexcept

      {

      {

        return __atomic_exchange_n(&_M_i, __i, __m);

        return __atomic_exchange_n(&_M_i, __i, __m);

      }

      }

      bool

      bool

      compare_exchange_weak(__int_type& __i1, __int_type __i2,

      compare_exchange_weak(__int_type& __i1, __int_type __i2,

                            memory_order __m1, memory_order __m2) noexcept

                            memory_order __m1, memory_order __m2) noexcept

      {

      {

        // __glibcxx_assert(__m2 != memory_order_release);

        // __glibcxx_assert(__m2 != memory_order_release);

        // __glibcxx_assert(__m2 != memory_order_acq_rel);

        // __glibcxx_assert(__m2 != memory_order_acq_rel);

        // __glibcxx_assert(__m2 <= __m1);

        // __glibcxx_assert(__m2 <= __m1);

        return __atomic_compare_exchange_n(&_M_i, &__i1, __i2, 1, __m1, __m2);

        return __atomic_compare_exchange_n(&_M_i, &__i1, __i2, 1, __m1, __m2);

      }

      }

      bool

      bool

      compare_exchange_weak(__int_type& __i1, __int_type __i2,

      compare_exchange_weak(__int_type& __i1, __int_type __i2,

                            memory_order __m1,

                            memory_order __m1,

                            memory_order __m2) volatile noexcept

                            memory_order __m2) volatile noexcept

      {

      {

        // __glibcxx_assert(__m2 != memory_order_release);

        // __glibcxx_assert(__m2 != memory_order_release);

        // __glibcxx_assert(__m2 != memory_order_acq_rel);

        // __glibcxx_assert(__m2 != memory_order_acq_rel);

        // __glibcxx_assert(__m2 <= __m1);

        // __glibcxx_assert(__m2 <= __m1);

        return __atomic_compare_exchange_n(&_M_i, &__i1, __i2, 1, __m1, __m2);

        return __atomic_compare_exchange_n(&_M_i, &__i1, __i2, 1, __m1, __m2);

      }

      }

      bool

      bool

      compare_exchange_weak(__int_type& __i1, __int_type __i2,

      compare_exchange_weak(__int_type& __i1, __int_type __i2,

                            memory_order __m = memory_order_seq_cst) noexcept

                            memory_order __m = memory_order_seq_cst) noexcept

      {

      {

        return compare_exchange_weak(__i1, __i2, __m,

        return compare_exchange_weak(__i1, __i2, __m,

                                     __calculate_memory_order(__m));

                                     __calculate_memory_order(__m));

      }

      }

      bool

      bool

      compare_exchange_weak(__int_type& __i1, __int_type __i2,

      compare_exchange_weak(__int_type& __i1, __int_type __i2,

                   memory_order __m = memory_order_seq_cst) volatile noexcept

                   memory_order __m = memory_order_seq_cst) volatile noexcept

      {

      {

        return compare_exchange_weak(__i1, __i2, __m,

        return compare_exchange_weak(__i1, __i2, __m,

                                     __calculate_memory_order(__m));

                                     __calculate_memory_order(__m));

      }

      }

      bool

      bool

      compare_exchange_strong(__int_type& __i1, __int_type __i2,

      compare_exchange_strong(__int_type& __i1, __int_type __i2,

                              memory_order __m1, memory_order __m2) noexcept

                              memory_order __m1, memory_order __m2) noexcept

      {

      {

        // __glibcxx_assert(__m2 != memory_order_release);

        // __glibcxx_assert(__m2 != memory_order_release);

        // __glibcxx_assert(__m2 != memory_order_acq_rel);

        // __glibcxx_assert(__m2 != memory_order_acq_rel);

        // __glibcxx_assert(__m2 <= __m1);

        // __glibcxx_assert(__m2 <= __m1);

        return __atomic_compare_exchange_n(&_M_i, &__i1, __i2, 0, __m1, __m2);

        return __atomic_compare_exchange_n(&_M_i, &__i1, __i2, 0, __m1, __m2);

      }

      }

      bool

      bool

      compare_exchange_strong(__int_type& __i1, __int_type __i2,

      compare_exchange_strong(__int_type& __i1, __int_type __i2,

                              memory_order __m1,

                              memory_order __m1,

                              memory_order __m2) volatile noexcept

                              memory_order __m2) volatile noexcept

      {

      {

        // __glibcxx_assert(__m2 != memory_order_release);

        // __glibcxx_assert(__m2 != memory_order_release);

        // __glibcxx_assert(__m2 != memory_order_acq_rel);

        // __glibcxx_assert(__m2 != memory_order_acq_rel);

        // __glibcxx_assert(__m2 <= __m1);

        // __glibcxx_assert(__m2 <= __m1);

        return __atomic_compare_exchange_n(&_M_i, &__i1, __i2, 0, __m1, __m2);

        return __atomic_compare_exchange_n(&_M_i, &__i1, __i2, 0, __m1, __m2);

      }

      }

      bool

      bool

      compare_exchange_strong(__int_type& __i1, __int_type __i2,

      compare_exchange_strong(__int_type& __i1, __int_type __i2,

                              memory_order __m = memory_order_seq_cst) noexcept

                              memory_order __m = memory_order_seq_cst) noexcept

      {

      {

        return compare_exchange_strong(__i1, __i2, __m,

        return compare_exchange_strong(__i1, __i2, __m,

                                       __calculate_memory_order(__m));

                                       __calculate_memory_order(__m));

      }

      }

      bool

      bool

      compare_exchange_strong(__int_type& __i1, __int_type __i2,

      compare_exchange_strong(__int_type& __i1, __int_type __i2,

                 memory_order __m = memory_order_seq_cst) volatile noexcept

                 memory_order __m = memory_order_seq_cst) volatile noexcept

      {

      {

        return compare_exchange_strong(__i1, __i2, __m,

        return compare_exchange_strong(__i1, __i2, __m,

                                       __calculate_memory_order(__m));

                                       __calculate_memory_order(__m));

      }

      }

      __int_type

      __int_type

      fetch_add(__int_type __i,

      fetch_add(__int_type __i,

                memory_order __m = memory_order_seq_cst) noexcept

                memory_order __m = memory_order_seq_cst) noexcept

      { return __atomic_fetch_add(&_M_i, __i, __m); }

      { return __atomic_fetch_add(&_M_i, __i, __m); }

      __int_type

      __int_type

      fetch_add(__int_type __i,

      fetch_add(__int_type __i,

                memory_order __m = memory_order_seq_cst) volatile noexcept

                memory_order __m = memory_order_seq_cst) volatile noexcept

      { return __atomic_fetch_add(&_M_i, __i, __m); }

      { return __atomic_fetch_add(&_M_i, __i, __m); }

      __int_type

      __int_type

      fetch_sub(__int_type __i,

      fetch_sub(__int_type __i,

                memory_order __m = memory_order_seq_cst) noexcept

                memory_order __m = memory_order_seq_cst) noexcept

      { return __atomic_fetch_sub(&_M_i, __i, __m); }

      { return __atomic_fetch_sub(&_M_i, __i, __m); }

      __int_type

      __int_type

      fetch_sub(__int_type __i,

      fetch_sub(__int_type __i,

                memory_order __m = memory_order_seq_cst) volatile noexcept

                memory_order __m = memory_order_seq_cst) volatile noexcept

      { return __atomic_fetch_sub(&_M_i, __i, __m); }

      { return __atomic_fetch_sub(&_M_i, __i, __m); }

      __int_type

      __int_type

      fetch_and(__int_type __i,

      fetch_and(__int_type __i,

                memory_order __m = memory_order_seq_cst) noexcept

                memory_order __m = memory_order_seq_cst) noexcept

      { return __atomic_fetch_and(&_M_i, __i, __m); }

      { return __atomic_fetch_and(&_M_i, __i, __m); }

      __int_type

      __int_type

      fetch_and(__int_type __i,

      fetch_and(__int_type __i,

                memory_order __m = memory_order_seq_cst) volatile noexcept

                memory_order __m = memory_order_seq_cst) volatile noexcept

      { return __atomic_fetch_and(&_M_i, __i, __m); }

      { return __atomic_fetch_and(&_M_i, __i, __m); }

      __int_type

      __int_type

      fetch_or(__int_type __i,

      fetch_or(__int_type __i,

               memory_order __m = memory_order_seq_cst) noexcept

               memory_order __m = memory_order_seq_cst) noexcept

      { return __atomic_fetch_or(&_M_i, __i, __m); }

      { return __atomic_fetch_or(&_M_i, __i, __m); }

      __int_type

      __int_type

      fetch_or(__int_type __i,

      fetch_or(__int_type __i,

               memory_order __m = memory_order_seq_cst) volatile noexcept

               memory_order __m = memory_order_seq_cst) volatile noexcept

      { return __atomic_fetch_or(&_M_i, __i, __m); }

      { return __atomic_fetch_or(&_M_i, __i, __m); }

      __int_type

      __int_type

      fetch_xor(__int_type __i,

      fetch_xor(__int_type __i,

                memory_order __m = memory_order_seq_cst) noexcept

                memory_order __m = memory_order_seq_cst) noexcept

      { return __atomic_fetch_xor(&_M_i, __i, __m); }

      { return __atomic_fetch_xor(&_M_i, __i, __m); }

      __int_type

      __int_type

      fetch_xor(__int_type __i,

      fetch_xor(__int_type __i,

                memory_order __m = memory_order_seq_cst) volatile noexcept

                memory_order __m = memory_order_seq_cst) volatile noexcept

      { return __atomic_fetch_xor(&_M_i, __i, __m); }

      { return __atomic_fetch_xor(&_M_i, __i, __m); }

    };

    };

  /// Partial specialization for pointer types.

  /// Partial specialization for pointer types.

  template

  template

    struct __atomic_base<_PTp*>

    struct __atomic_base<_PTp*>

    {

    {

    private:

    private:

      typedef _PTp*     __pointer_type;

      typedef _PTp*     __pointer_type;

      __pointer_type    _M_p;

      __pointer_type    _M_p;

    public:

    public:

      __atomic_base() noexcept = default;

      __atomic_base() noexcept = default;

      ~__atomic_base() noexcept = default;

      ~__atomic_base() noexcept = default;

      __atomic_base(const __atomic_base&) = delete;

      __atomic_base(const __atomic_base&) = delete;

      __atomic_base& operator=(const __atomic_base&) = delete;

      __atomic_base& operator=(const __atomic_base&) = delete;

      __atomic_base& operator=(const __atomic_base&) volatile = delete;

      __atomic_base& operator=(const __atomic_base&) volatile = delete;

      // Requires __pointer_type convertible to _M_p.

      // Requires __pointer_type convertible to _M_p.

      constexpr __atomic_base(__pointer_type __p) noexcept : _M_p (__p) { }

      constexpr __atomic_base(__pointer_type __p) noexcept : _M_p (__p) { }

      operator __pointer_type() const noexcept

      operator __pointer_type() const noexcept

      { return load(); }

      { return load(); }

      operator __pointer_type() const volatile noexcept

      operator __pointer_type() const volatile noexcept

      { return load(); }

      { return load(); }

      __pointer_type

      __pointer_type

      operator=(__pointer_type __p) noexcept

      operator=(__pointer_type __p) noexcept

      {

      {

        store(__p);

        store(__p);

        return __p;

        return __p;

      }

      }

      __pointer_type

      __pointer_type

      operator=(__pointer_type __p) volatile noexcept

      operator=(__pointer_type __p) volatile noexcept

      {

      {

        store(__p);

        store(__p);

        return __p;

        return __p;

      }

      }

      __pointer_type

      __pointer_type

      operator++(int) noexcept

      operator++(int) noexcept

      { return fetch_add(1); }

      { return fetch_add(1); }

      __pointer_type

      __pointer_type

      operator++(int) volatile noexcept

      operator++(int) volatile noexcept

      { return fetch_add(1); }

      { return fetch_add(1); }

      __pointer_type

      __pointer_type

      operator--(int) noexcept

      operator--(int) noexcept

      { return fetch_sub(1); }

      { return fetch_sub(1); }

      __pointer_type

      __pointer_type

      operator--(int) volatile noexcept

      operator--(int) volatile noexcept

      { return fetch_sub(1); }

      { return fetch_sub(1); }

      __pointer_type

      __pointer_type

      operator++() noexcept

      operator++() noexcept

      { return __atomic_add_fetch(&_M_p, 1, memory_order_seq_cst); }

      { return __atomic_add_fetch(&_M_p, 1, memory_order_seq_cst); }

      __pointer_type

      __pointer_type

      operator++() volatile noexcept

      operator++() volatile noexcept

      { return __atomic_add_fetch(&_M_p, 1, memory_order_seq_cst); }

      { return __atomic_add_fetch(&_M_p, 1, memory_order_seq_cst); }

      __pointer_type

      __pointer_type

      operator--() noexcept

      operator--() noexcept

      { return __atomic_sub_fetch(&_M_p, 1, memory_order_seq_cst); }

      { return __atomic_sub_fetch(&_M_p, 1, memory_order_seq_cst); }

      __pointer_type

      __pointer_type

      operator--() volatile noexcept

      operator--() volatile noexcept

      { return __atomic_sub_fetch(&_M_p, 1, memory_order_seq_cst); }

      { return __atomic_sub_fetch(&_M_p, 1, memory_order_seq_cst); }

      __pointer_type

      __pointer_type

      operator+=(ptrdiff_t __d) noexcept

      operator+=(ptrdiff_t __d) noexcept

      { return __atomic_add_fetch(&_M_p, __d, memory_order_seq_cst); }

      { return __atomic_add_fetch(&_M_p, __d, memory_order_seq_cst); }

      __pointer_type

      __pointer_type

      operator+=(ptrdiff_t __d) volatile noexcept

      operator+=(ptrdiff_t __d) volatile noexcept

      { return __atomic_add_fetch(&_M_p, __d, memory_order_seq_cst); }

      { return __atomic_add_fetch(&_M_p, __d, memory_order_seq_cst); }

      __pointer_type

      __pointer_type

      operator-=(ptrdiff_t __d) noexcept

      operator-=(ptrdiff_t __d) noexcept

      { return __atomic_sub_fetch(&_M_p, __d, memory_order_seq_cst); }

      { return __atomic_sub_fetch(&_M_p, __d, memory_order_seq_cst); }

      __pointer_type

      __pointer_type

      operator-=(ptrdiff_t __d) volatile noexcept

      operator-=(ptrdiff_t __d) volatile noexcept

      { return __atomic_sub_fetch(&_M_p, __d, memory_order_seq_cst); }

      { return __atomic_sub_fetch(&_M_p, __d, memory_order_seq_cst); }

      bool

      bool

      is_lock_free() const noexcept

      is_lock_free() const noexcept

      { return __atomic_is_lock_free (sizeof (_M_p), &_M_p); }

      { return __atomic_is_lock_free (sizeof (_M_p), &_M_p); }

      bool

      bool

      is_lock_free() const volatile noexcept

      is_lock_free() const volatile noexcept

      { return __atomic_is_lock_free (sizeof (_M_p), &_M_p); }

      { return __atomic_is_lock_free (sizeof (_M_p), &_M_p); }

      void

      void

      store(__pointer_type __p,

      store(__pointer_type __p,

            memory_order __m = memory_order_seq_cst) noexcept

            memory_order __m = memory_order_seq_cst) noexcept

      {

      {

        // __glibcxx_assert(__m != memory_order_acquire);

        // __glibcxx_assert(__m != memory_order_acquire);

        // __glibcxx_assert(__m != memory_order_acq_rel);

        // __glibcxx_assert(__m != memory_order_acq_rel);

        // __glibcxx_assert(__m != memory_order_consume);

        // __glibcxx_assert(__m != memory_order_consume);

        __atomic_store_n(&_M_p, __p, __m);

        __atomic_store_n(&_M_p, __p, __m);

      }

      }

      void

      void

      store(__pointer_type __p,

      store(__pointer_type __p,

            memory_order __m = memory_order_seq_cst) volatile noexcept

            memory_order __m = memory_order_seq_cst) volatile noexcept

      {

      {

        // __glibcxx_assert(__m != memory_order_acquire);

        // __glibcxx_assert(__m != memory_order_acquire);

        // __glibcxx_assert(__m != memory_order_acq_rel);

        // __glibcxx_assert(__m != memory_order_acq_rel);

        // __glibcxx_assert(__m != memory_order_consume);

        // __glibcxx_assert(__m != memory_order_consume);

        __atomic_store_n(&_M_p, __p, __m);

        __atomic_store_n(&_M_p, __p, __m);

      }

      }

      __pointer_type

      __pointer_type

      load(memory_order __m = memory_order_seq_cst) const noexcept

      load(memory_order __m = memory_order_seq_cst) const noexcept

      {

      {

        // __glibcxx_assert(__m != memory_order_release);

        // __glibcxx_assert(__m != memory_order_release);

        // __glibcxx_assert(__m != memory_order_acq_rel);

        // __glibcxx_assert(__m != memory_order_acq_rel);

        return __atomic_load_n(&_M_p, __m);

        return __atomic_load_n(&_M_p, __m);

      }

      }

      __pointer_type

      __pointer_type

      load(memory_order __m = memory_order_seq_cst) const volatile noexcept

      load(memory_order __m = memory_order_seq_cst) const volatile noexcept

      {

      {

        // __glibcxx_assert(__m != memory_order_release);

        // __glibcxx_assert(__m != memory_order_release);

        // __glibcxx_assert(__m != memory_order_acq_rel);

        // __glibcxx_assert(__m != memory_order_acq_rel);

        return __atomic_load_n(&_M_p, __m);

        return __atomic_load_n(&_M_p, __m);

      }

      }

      __pointer_type

      __pointer_type

      exchange(__pointer_type __p,

      exchange(__pointer_type __p,

               memory_order __m = memory_order_seq_cst) noexcept

               memory_order __m = memory_order_seq_cst) noexcept

      {

      {

        return __atomic_exchange_n(&_M_p, __p, __m);

        return __atomic_exchange_n(&_M_p, __p, __m);

      }

      }

      __pointer_type

      __pointer_type

      exchange(__pointer_type __p,

      exchange(__pointer_type __p,

               memory_order __m = memory_order_seq_cst) volatile noexcept

               memory_order __m = memory_order_seq_cst) volatile noexcept

      {

      {

        return __atomic_exchange_n(&_M_p, __p, __m);

        return __atomic_exchange_n(&_M_p, __p, __m);

      }

      }

      bool

      bool

      compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,

      compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,

                              memory_order __m1,

                              memory_order __m1,

                              memory_order __m2) noexcept

                              memory_order __m2) noexcept

      {

      {

        // __glibcxx_assert(__m2 != memory_order_release);

        // __glibcxx_assert(__m2 != memory_order_release);

        // __glibcxx_assert(__m2 != memory_order_acq_rel);

        // __glibcxx_assert(__m2 != memory_order_acq_rel);

        // __glibcxx_assert(__m2 <= __m1);

        // __glibcxx_assert(__m2 <= __m1);

        return __atomic_compare_exchange_n(&_M_p, &__p1, __p2, 0, __m1, __m2);

        return __atomic_compare_exchange_n(&_M_p, &__p1, __p2, 0, __m1, __m2);

      }

      }

      bool

      bool

      compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,

      compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,

                              memory_order __m1,

                              memory_order __m1,

                              memory_order __m2) volatile noexcept

                              memory_order __m2) volatile noexcept

      {

      {

        // __glibcxx_assert(__m2 != memory_order_release);

        // __glibcxx_assert(__m2 != memory_order_release);

        // __glibcxx_assert(__m2 != memory_order_acq_rel);

        // __glibcxx_assert(__m2 != memory_order_acq_rel);

        // __glibcxx_assert(__m2 <= __m1);

        // __glibcxx_assert(__m2 <= __m1);

        return __atomic_compare_exchange_n(&_M_p, &__p1, __p2, 0, __m1, __m2);

        return __atomic_compare_exchange_n(&_M_p, &__p1, __p2, 0, __m1, __m2);

      }

      }

      __pointer_type

      __pointer_type

      fetch_add(ptrdiff_t __d,

      fetch_add(ptrdiff_t __d,

                memory_order __m = memory_order_seq_cst) noexcept

                memory_order __m = memory_order_seq_cst) noexcept

      { return __atomic_fetch_add(&_M_p, __d, __m); }

      { return __atomic_fetch_add(&_M_p, __d, __m); }

      __pointer_type

      __pointer_type

      fetch_add(ptrdiff_t __d,

      fetch_add(ptrdiff_t __d,

                memory_order __m = memory_order_seq_cst) volatile noexcept

                memory_order __m = memory_order_seq_cst) volatile noexcept

      { return __atomic_fetch_add(&_M_p, __d, __m); }

      { return __atomic_fetch_add(&_M_p, __d, __m); }

      __pointer_type

      __pointer_type

      fetch_sub(ptrdiff_t __d,

      fetch_sub(ptrdiff_t __d,

                memory_order __m = memory_order_seq_cst) noexcept

                memory_order __m = memory_order_seq_cst) noexcept

      { return __atomic_fetch_sub(&_M_p, __d, __m); }

      { return __atomic_fetch_sub(&_M_p, __d, __m); }

      __pointer_type

      __pointer_type

      fetch_sub(ptrdiff_t __d,

      fetch_sub(ptrdiff_t __d,

                memory_order __m = memory_order_seq_cst) volatile noexcept

                memory_order __m = memory_order_seq_cst) volatile noexcept

      { return __atomic_fetch_sub(&_M_p, __d, __m); }

      { return __atomic_fetch_sub(&_M_p, __d, __m); }

    };

    };

  /**

  /**

   * @addtogroup atomics

   * @addtogroup atomics

   * @{

   * @{

   */

   */

  /// atomic_bool

  /// atomic_bool

  // NB: No operators or fetch-operations for this type.

  // NB: No operators or fetch-operations for this type.

  struct atomic_bool

  struct atomic_bool

  {

  {

  private:

  private:

    __atomic_base       _M_base;

    __atomic_base       _M_base;

  public:

  public:

    atomic_bool() noexcept = default;

    atomic_bool() noexcept = default;

    ~atomic_bool() noexcept = default;

    ~atomic_bool() noexcept = default;

    atomic_bool(const atomic_bool&) = delete;

    atomic_bool(const atomic_bool&) = delete;

    atomic_bool& operator=(const atomic_bool&) = delete;

    atomic_bool& operator=(const atomic_bool&) = delete;

    atomic_bool& operator=(const atomic_bool&) volatile = delete;

    atomic_bool& operator=(const atomic_bool&) volatile = delete;

    constexpr atomic_bool(bool __i) noexcept : _M_base(__i) { }

    constexpr atomic_bool(bool __i) noexcept : _M_base(__i) { }

    bool

    bool

    operator=(bool __i) noexcept

    operator=(bool __i) noexcept

    { return _M_base.operator=(__i); }

    { return _M_base.operator=(__i); }

    operator bool() const noexcept

    operator bool() const noexcept

    { return _M_base.load(); }

    { return _M_base.load(); }

    operator bool() const volatile noexcept

    operator bool() const volatile noexcept

    { return _M_base.load(); }

    { return _M_base.load(); }

    bool

    bool

    is_lock_free() const noexcept { return _M_base.is_lock_free(); }

    is_lock_free() const noexcept { return _M_base.is_lock_free(); }

    bool

    bool

    is_lock_free() const volatile noexcept { return _M_base.is_lock_free(); }

    is_lock_free() const volatile noexcept { return _M_base.is_lock_free(); }

    void

    void

    store(bool __i, memory_order __m = memory_order_seq_cst) noexcept

    store(bool __i, memory_order __m = memory_order_seq_cst) noexcept

    { _M_base.store(__i, __m); }

    { _M_base.store(__i, __m); }

    void

    void

    store(bool __i, memory_order __m = memory_order_seq_cst) volatile noexcept

    store(bool __i, memory_order __m = memory_order_seq_cst) volatile noexcept

    { _M_base.store(__i, __m); }

    { _M_base.store(__i, __m); }

    bool

    bool

    load(memory_order __m = memory_order_seq_cst) const noexcept

    load(memory_order __m = memory_order_seq_cst) const noexcept

    { return _M_base.load(__m); }

    { return _M_base.load(__m); }

    bool

    bool

    load(memory_order __m = memory_order_seq_cst) const volatile noexcept

    load(memory_order __m = memory_order_seq_cst) const volatile noexcept

    { return _M_base.load(__m); }

    { return _M_base.load(__m); }

    bool

    bool

    exchange(bool __i, memory_order __m = memory_order_seq_cst) noexcept

    exchange(bool __i, memory_order __m = memory_order_seq_cst) noexcept

    { return _M_base.exchange(__i, __m); }

    { return _M_base.exchange(__i, __m); }

    bool

    bool

    exchange(bool __i,

    exchange(bool __i,

             memory_order __m = memory_order_seq_cst) volatile noexcept

             memory_order __m = memory_order_seq_cst) volatile noexcept

    { return _M_base.exchange(__i, __m); }

    { return _M_base.exchange(__i, __m); }

    bool

    bool

    compare_exchange_weak(bool& __i1, bool __i2, memory_order __m1,

    compare_exchange_weak(bool& __i1, bool __i2, memory_order __m1,

                          memory_order __m2) noexcept

                          memory_order __m2) noexcept

    { return _M_base.compare_exchange_weak(__i1, __i2, __m1, __m2); }

    { return _M_base.compare_exchange_weak(__i1, __i2, __m1, __m2); }

    bool

    bool

    compare_exchange_weak(bool& __i1, bool __i2, memory_order __m1,

    compare_exchange_weak(bool& __i1, bool __i2, memory_order __m1,

                          memory_order __m2) volatile noexcept

                          memory_order __m2) volatile noexcept

    { return _M_base.compare_exchange_weak(__i1, __i2, __m1, __m2); }

    { return _M_base.compare_exchange_weak(__i1, __i2, __m1, __m2); }

    bool

    bool

    compare_exchange_weak(bool& __i1, bool __i2,

    compare_exchange_weak(bool& __i1, bool __i2,

                          memory_order __m = memory_order_seq_cst) noexcept

                          memory_order __m = memory_order_seq_cst) noexcept

    { return _M_base.compare_exchange_weak(__i1, __i2, __m); }

    { return _M_base.compare_exchange_weak(__i1, __i2, __m); }

    bool

    bool

    compare_exchange_weak(bool& __i1, bool __i2,

    compare_exchange_weak(bool& __i1, bool __i2,

                     memory_order __m = memory_order_seq_cst) volatile noexcept

                     memory_order __m = memory_order_seq_cst) volatile noexcept

    { return _M_base.compare_exchange_weak(__i1, __i2, __m); }

    { return _M_base.compare_exchange_weak(__i1, __i2, __m); }

    bool

    bool

    compare_exchange_strong(bool& __i1, bool __i2, memory_order __m1,

    compare_exchange_strong(bool& __i1, bool __i2, memory_order __m1,

                            memory_order __m2) noexcept

                            memory_order __m2) noexcept

    { return _M_base.compare_exchange_strong(__i1, __i2, __m1, __m2); }

    { return _M_base.compare_exchange_strong(__i1, __i2, __m1, __m2); }

    bool

    bool

    compare_exchange_strong(bool& __i1, bool __i2, memory_order __m1,

    compare_exchange_strong(bool& __i1, bool __i2, memory_order __m1,

                            memory_order __m2) volatile noexcept

                            memory_order __m2) volatile noexcept

    { return _M_base.compare_exchange_strong(__i1, __i2, __m1, __m2); }

    { return _M_base.compare_exchange_strong(__i1, __i2, __m1, __m2); }

    bool