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

// Copyright (C) 2008-2012 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

// .

/** @file include/atomic

 *  This is a Standard C++ Library header.

 */

// 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

#ifndef _GLIBCXX_ATOMIC

#define _GLIBCXX_ATOMIC 1

#pragma GCC system_header

#if __cplusplus < 201103L

# include 

#endif

#include 

namespace std _GLIBCXX_VISIBILITY(default)

{

_GLIBCXX_BEGIN_NAMESPACE_VERSION

  /**

   * @addtogroup atomics

   * @{

   */

  /// atomic_bool

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

  struct atomic_bool

  {

  private:

    __atomic_base       _M_base;

  public:

    atomic_bool() noexcept = default;

    ~atomic_bool() noexcept = default;

    atomic_bool(const atomic_bool&) = delete;

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

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

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

    bool

    operator=(bool __i) noexcept

    { return _M_base.operator=(__i); }

    operator bool() const noexcept

    { return _M_base.load(); }

    operator bool() const volatile noexcept

    { return _M_base.load(); }

    bool

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

    bool

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

    void

    store(bool __i, memory_order __m = memory_order_seq_cst) noexcept

    { _M_base.store(__i, __m); }

    void

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

    { _M_base.store(__i, __m); }

    bool

    load(memory_order __m = memory_order_seq_cst) const noexcept

    { return _M_base.load(__m); }

    bool

    load(memory_order __m = memory_order_seq_cst) const volatile noexcept

    { return _M_base.load(__m); }

    bool

    exchange(bool __i, memory_order __m = memory_order_seq_cst) noexcept

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

    bool

    exchange(bool __i,

             memory_order __m = memory_order_seq_cst) volatile noexcept

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

    bool

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

                          memory_order __m2) noexcept

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

    bool

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

                          memory_order __m2) volatile noexcept

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

    bool

    compare_exchange_weak(bool& __i1, bool __i2,

                          memory_order __m = memory_order_seq_cst) noexcept

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

    bool

    compare_exchange_weak(bool& __i1, bool __i2,

                     memory_order __m = memory_order_seq_cst) volatile noexcept

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

    bool

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

                            memory_order __m2) noexcept

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

    bool

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

                            memory_order __m2) volatile noexcept

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

    bool

    compare_exchange_strong(bool& __i1, bool __i2,

                            memory_order __m = memory_order_seq_cst) noexcept

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

    bool

    compare_exchange_strong(bool& __i1, bool __i2,

                    memory_order __m = memory_order_seq_cst) volatile noexcept

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

  };

  /**

   *  @brief Generic atomic type, primary class template.

   *

   *  @tparam _Tp  Type to be made atomic, must be trivally copyable.

   */

  template

    struct atomic

    {

    private:

      _Tp _M_i;

    public:

      atomic() noexcept = default;

      ~atomic() noexcept = default;

      atomic(const atomic&) = delete;

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

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

      constexpr atomic(_Tp __i) noexcept : _M_i(__i) { }

      operator _Tp() const noexcept

      { return load(); }

      operator _Tp() const volatile noexcept

      { return load(); }

      _Tp

      operator=(_Tp __i) noexcept

      { store(__i); return __i; }

      _Tp

      operator=(_Tp __i) volatile noexcept

      { store(__i); return __i; }

      bool

      is_lock_free() const noexcept

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

      bool

      is_lock_free() const volatile noexcept

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

      void

      store(_Tp __i, memory_order _m = memory_order_seq_cst) noexcept

      { __atomic_store(&_M_i, &__i, _m); }

      void

      store(_Tp __i, memory_order _m = memory_order_seq_cst) volatile noexcept

      { __atomic_store(&_M_i, &__i, _m); }

      _Tp

      load(memory_order _m = memory_order_seq_cst) const noexcept

      {

        _Tp tmp;

        __atomic_load(&_M_i, &tmp, _m);

        return tmp;

      }

      _Tp

      load(memory_order _m = memory_order_seq_cst) const volatile noexcept

      {

        _Tp tmp;

        __atomic_load(&_M_i, &tmp, _m);

        return tmp;

      }

      _Tp

      exchange(_Tp __i, memory_order _m = memory_order_seq_cst) noexcept

      {

        _Tp tmp;

        __atomic_exchange(&_M_i, &__i, &tmp, _m);

        return tmp;

      }

      _Tp

      exchange(_Tp __i,

               memory_order _m = memory_order_seq_cst) volatile noexcept

      {

        _Tp tmp;

        __atomic_exchange(&_M_i, &__i, &tmp, _m);

        return tmp;

      }

      bool

      compare_exchange_weak(_Tp& __e, _Tp __i, memory_order __s,

                            memory_order __f) noexcept

      {

        return __atomic_compare_exchange(&_M_i, &__e, &__i, true, __s, __f);

      }

      bool

      compare_exchange_weak(_Tp& __e, _Tp __i, memory_order __s,

                            memory_order __f) volatile noexcept

      {

        return __atomic_compare_exchange(&_M_i, &__e, &__i, true, __s, __f);

      }

      bool

      compare_exchange_weak(_Tp& __e, _Tp __i,

                            memory_order __m = memory_order_seq_cst) noexcept

      { return compare_exchange_weak(__e, __i, __m, __m); }

      bool

      compare_exchange_weak(_Tp& __e, _Tp __i,

                     memory_order __m = memory_order_seq_cst) volatile noexcept

      { return compare_exchange_weak(__e, __i, __m, __m); }

      bool

      compare_exchange_strong(_Tp& __e, _Tp __i, memory_order __s,

                              memory_order __f) noexcept

      {

        return __atomic_compare_exchange(&_M_i, &__e, &__i, false, __s, __f);

      }

      bool

      compare_exchange_strong(_Tp& __e, _Tp __i, memory_order __s,

                              memory_order __f) volatile noexcept

      {

        return __atomic_compare_exchange(&_M_i, &__e, &__i, false, __s, __f);

      }

      bool

      compare_exchange_strong(_Tp& __e, _Tp __i,

                               memory_order __m = memory_order_seq_cst) noexcept

      { return compare_exchange_strong(__e, __i, __m, __m); }

      bool

      compare_exchange_strong(_Tp& __e, _Tp __i,

                     memory_order __m = memory_order_seq_cst) volatile noexcept

      { return compare_exchange_strong(__e, __i, __m, __m); }

    };

  /// Partial specialization for pointer types.

  template

    struct atomic<_Tp*>

    {

      typedef _Tp*                      __pointer_type;

      typedef __atomic_base<_Tp*>     __base_type;

      __base_type                       _M_b;

      atomic() noexcept = default;

      ~atomic() noexcept = default;

      atomic(const atomic&) = delete;

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

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

      constexpr atomic(__pointer_type __p) noexcept : _M_b(__p) { }

      operator __pointer_type() const noexcept

      { return __pointer_type(_M_b); }

      operator __pointer_type() const volatile noexcept

      { return __pointer_type(_M_b); }

      __pointer_type

      operator=(__pointer_type __p) noexcept

      { return _M_b.operator=(__p); }

      __pointer_type

      operator=(__pointer_type __p) volatile noexcept

      { return _M_b.operator=(__p); }

      __pointer_type

      operator++(int) noexcept

      { return _M_b++; }

      __pointer_type

      operator++(int) volatile noexcept

      { return _M_b++; }

      __pointer_type

      operator--(int) noexcept

      { return _M_b--; }

      __pointer_type

      operator--(int) volatile noexcept

      { return _M_b--; }

      __pointer_type

      operator++() noexcept

      { return ++_M_b; }

      __pointer_type

      operator++() volatile noexcept

      { return ++_M_b; }

      __pointer_type

      operator--() noexcept

      { return --_M_b; }

      __pointer_type

      operator--() volatile noexcept

      { return --_M_b; }

      __pointer_type

      operator+=(ptrdiff_t __d) noexcept

      { return _M_b.operator+=(__d); }

      __pointer_type

      operator+=(ptrdiff_t __d) volatile noexcept

      { return _M_b.operator+=(__d); }

      __pointer_type

      operator-=(ptrdiff_t __d) noexcept

      { return _M_b.operator-=(__d); }

      __pointer_type

      operator-=(ptrdiff_t __d) volatile noexcept

      { return _M_b.operator-=(__d); }

      bool

      is_lock_free() const noexcept

      { return _M_b.is_lock_free(); }

      bool

      is_lock_free() const volatile noexcept

      { return _M_b.is_lock_free(); }

      void

      store(__pointer_type __p,

            memory_order __m = memory_order_seq_cst) noexcept

      { return _M_b.store(__p, __m); }

      void

      store(__pointer_type __p,

            memory_order __m = memory_order_seq_cst) volatile noexcept

      { return _M_b.store(__p, __m); }

      __pointer_type

      load(memory_order __m = memory_order_seq_cst) const noexcept

      { return _M_b.load(__m); }

      __pointer_type

      load(memory_order __m = memory_order_seq_cst) const volatile noexcept

      { return _M_b.load(__m); }

      __pointer_type

      exchange(__pointer_type __p,

               memory_order __m = memory_order_seq_cst) noexcept

      { return _M_b.exchange(__p, __m); }

      __pointer_type

      exchange(__pointer_type __p,

               memory_order __m = memory_order_seq_cst) volatile noexcept

      { return _M_b.exchange(__p, __m); }

      bool

      compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2,

                            memory_order __m1, memory_order __m2) noexcept

      { return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); }

      bool

      compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2,

                            memory_order __m1,

                            memory_order __m2) volatile noexcept

      { return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); }

      bool

      compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2,

                            memory_order __m = memory_order_seq_cst) noexcept

      {

        return compare_exchange_weak(__p1, __p2, __m,

                                     __cmpexch_failure_order(__m));

      }

      bool

      compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2,

                    memory_order __m = memory_order_seq_cst) volatile noexcept

      {

        return compare_exchange_weak(__p1, __p2, __m,

                                     __cmpexch_failure_order(__m));

      }

      bool

      compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,

                              memory_order __m1, memory_order __m2) noexcept

      { return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); }

      bool

      compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,

                              memory_order __m1,

                              memory_order __m2) volatile noexcept

      { return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); }

      bool

      compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,

                              memory_order __m = memory_order_seq_cst) noexcept

      {

        return _M_b.compare_exchange_strong(__p1, __p2, __m,

                                            __cmpexch_failure_order(__m));

      }

      bool

      compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,

                    memory_order __m = memory_order_seq_cst) volatile noexcept

      {

        return _M_b.compare_exchange_strong(__p1, __p2, __m,

                                            __cmpexch_failure_order(__m));

      }

      __pointer_type

      fetch_add(ptrdiff_t __d,

                memory_order __m = memory_order_seq_cst) noexcept

      { return _M_b.fetch_add(__d, __m); }

      __pointer_type

      fetch_add(ptrdiff_t __d,

                memory_order __m = memory_order_seq_cst) volatile noexcept

      { return _M_b.fetch_add(__d, __m); }

      __pointer_type

      fetch_sub(ptrdiff_t __d,

                memory_order __m = memory_order_seq_cst) noexcept

      { return _M_b.fetch_sub(__d, __m); }

      __pointer_type

      fetch_sub(ptrdiff_t __d,

                memory_order __m = memory_order_seq_cst) volatile noexcept

      { return _M_b.fetch_sub(__d, __m); }

    };

  /// Explicit specialization for bool.

  template<>

    struct atomic : public atomic_bool

    {

      typedef bool                      __integral_type;

      typedef atomic_bool               __base_type;

      atomic() noexcept = default;

      ~atomic() noexcept = default;

      atomic(const atomic&) = delete;

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

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

      constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }

      using __base_type::operator __integral_type;

      using __base_type::operator=;

    };

  /// Explicit specialization for char.

  template<>

    struct atomic : public atomic_char

    {

      typedef char                      __integral_type;

      typedef atomic_char               __base_type;

      atomic() noexcept = default;

      ~atomic() noexcept = default;

      atomic(const atomic&) = delete;

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

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

      constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }

      using __base_type::operator __integral_type;

      using __base_type::operator=;

    };

  /// Explicit specialization for signed char.

  template<>

    struct atomic : public atomic_schar

    {

      typedef signed char               __integral_type;

      typedef atomic_schar              __base_type;

      atomic() noexcept= default;

      ~atomic() noexcept = default;

      atomic(const atomic&) = delete;

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

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

      constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }

      using __base_type::operator __integral_type;

      using __base_type::operator=;

    };

  /// Explicit specialization for unsigned char.

  template<>

    struct atomic : public atomic_uchar

    {

      typedef unsigned char             __integral_type;

      typedef atomic_uchar              __base_type;

      atomic() noexcept= default;

      ~atomic() noexcept = default;

      atomic(const atomic&) = delete;

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

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

      constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }

      using __base_type::operator __integral_type;

      using __base_type::operator=;

    };

  /// Explicit specialization for short.

  template<>

    struct atomic : public atomic_short

    {

      typedef short                     __integral_type;

      typedef atomic_short              __base_type;

      atomic() noexcept = default;

      ~atomic() noexcept = default;

      atomic(const atomic&) = delete;

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

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

      constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }

      using __base_type::operator __integral_type;

      using __base_type::operator=;

    };

  /// Explicit specialization for unsigned short.

  template<>

    struct atomic : public atomic_ushort

    {

      typedef unsigned short            __integral_type;

      typedef atomic_ushort             __base_type;

      atomic() noexcept = default;

      ~atomic() noexcept = default;

      atomic(const atomic&) = delete;

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

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

      constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }

      using __base_type::operator __integral_type;

      using __base_type::operator=;

    };

  /// Explicit specialization for int.

  template<>

    struct atomic : atomic_int

    {

      typedef int                       __integral_type;

      typedef atomic_int                __base_type;

      atomic() noexcept = default;

      ~atomic() noexcept = default;

      atomic(const atomic&) = delete;

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

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

      constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }

      using __base_type::operator __integral_type;

      using __base_type::operator=;

    };

  /// Explicit specialization for unsigned int.

  template<>

    struct atomic : public atomic_uint

    {

      typedef unsigned int              __integral_type;

      typedef atomic_uint               __base_type;

      atomic() noexcept = default;

      ~atomic() noexcept = default;

      atomic(const atomic&) = delete;

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

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

      constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }

      using __base_type::operator __integral_type;

      using __base_type::operator=;

    };

  /// Explicit specialization for long.

  template<>

    struct atomic : public atomic_long

    {

      typedef long                      __integral_type;

      typedef atomic_long               __base_type;

      atomic() noexcept = default;

      ~atomic() noexcept = default;

      atomic(const atomic&) = delete;

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

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

      constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }

      using __base_type::operator __integral_type;

      using __base_type::operator=;

    };

  /// Explicit specialization for unsigned long.

  template<>

    struct atomic : public atomic_ulong

    {

      typedef unsigned long             __integral_type;

      typedef atomic_ulong              __base_type;

      atomic() noexcept = default;

      ~atomic() noexcept = default;

      atomic(const atomic&) = delete;

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

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

      constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }

      using __base_type::operator __integral_type;

      using __base_type::operator=;

    };

  /// Explicit specialization for long long.

  template<>

    struct atomic : public atomic_llong

    {

      typedef long long                 __integral_type;

      typedef atomic_llong              __base_type;

      atomic() noexcept = default;

      ~atomic() noexcept = default;

      atomic(const atomic&) = delete;

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

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

      constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }

      using __base_type::operator __integral_type;

      using __base_type::operator=;

    };

  /// Explicit specialization for unsigned long long.

  template<>

    struct atomic : public atomic_ullong

    {

      typedef unsigned long long        __integral_type;

      typedef atomic_ullong             __base_type;

      atomic() noexcept = default;

      ~atomic() noexcept = default;

      atomic(const atomic&) = delete;

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

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

      constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }

      using __base_type::operator __integral_type;

      using __base_type::operator=;

    };

  /// Explicit specialization for wchar_t.

  template<>

    struct atomic : public atomic_wchar_t

    {

      typedef wchar_t                   __integral_type;

      typedef atomic_wchar_t            __base_type;

      atomic() noexcept = default;

      ~atomic() noexcept = default;

      atomic(const atomic&) = delete;

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

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

      constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }

      using __base_type::operator __integral_type;

      using __base_type::operator=;

    };

  /// Explicit specialization for char16_t.

  template<>

    struct atomic : public atomic_char16_t

    {

      typedef char16_t                  __integral_type;

      typedef atomic_char16_t           __base_type;

      atomic() noexcept = default;

      ~atomic() noexcept = default;

      atomic(const atomic&) = delete;

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

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

      constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }

      using __base_type::operator __integral_type;

      using __base_type::operator=;

    };

  /// Explicit specialization for char32_t.

  template<>

    struct atomic : public atomic_char32_t

    {

      typedef char32_t                  __integral_type;

      typedef atomic_char32_t           __base_type;

      atomic() noexcept = default;

      ~atomic() noexcept = default;

      atomic(const atomic&) = delete;

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

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

      constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }

      using __base_type::operator __integral_type;

      using __base_type::operator=;

    };

  // Function definitions, atomic_flag operations.

  inline bool

  atomic_flag_test_and_set_explicit(atomic_flag* __a,

                                    memory_order __m) noexcept

  { return __a->test_and_set(__m); }

  inline bool

  atomic_flag_test_and_set_explicit(volatile atomic_flag* __a,

                                    memory_order __m) noexcept

  { return __a->test_and_set(__m); }

  inline void

  atomic_flag_clear_explicit(atomic_flag* __a, memory_order __m) noexcept

  { __a->clear(__m); }

  inline void

  atomic_flag_clear_explicit(volatile atomic_flag* __a,

                             memory_order __m) noexcept

  { __a->clear(__m); }

  inline bool

  atomic_flag_test_and_set(atomic_flag* __a) noexcept

  { return atomic_flag_test_and_set_explicit(__a, memory_order_seq_cst); }

  inline bool

  atomic_flag_test_and_set(volatile atomic_flag* __a) noexcept

  { return atomic_flag_test_and_set_explicit(__a, memory_order_seq_cst); }

  inline void

  atomic_flag_clear(atomic_flag* __a) noexcept

  { atomic_flag_clear_explicit(__a, memory_order_seq_cst); }

  inline void

  atomic_flag_clear(volatile atomic_flag* __a) noexcept

  { atomic_flag_clear_explicit(__a, memory_order_seq_cst); }

  // Function templates generally applicable to atomic types.

  template

    inline bool

    atomic_is_lock_free(const atomic<_ITp>* __a) noexcept

    { return __a->is_lock_free(); }

  template

    inline bool

    atomic_is_lock_free(const volatile atomic<_ITp>* __a) noexcept

    { return __a->is_lock_free(); }

  template

    inline void

    atomic_init(atomic<_ITp>* __a, _ITp __i) noexcept;

  template

    inline void

    atomic_init(volatile atomic<_ITp>* __a, _ITp __i) noexcept;

  template

    inline void

    atomic_store_explicit(atomic<_ITp>* __a, _ITp __i,

                          memory_order __m) noexcept

    { __a->store(__i, __m); }

  template

    inline void

    atomic_store_explicit(volatile atomic<_ITp>* __a, _ITp __i,

                          memory_order __m) noexcept

    { __a->store(__i, __m); }

  template

    inline _ITp

    atomic_load_explicit(const atomic<_ITp>* __a, memory_order __m) noexcept

    { return __a->load(__m); }

  template

    inline _ITp

    atomic_load_explicit(const volatile atomic<_ITp>* __a,

                         memory_order __m) noexcept

    { return __a->load(__m); }

  template

    inline _ITp

    atomic_exchange_explicit(atomic<_ITp>* __a, _ITp __i,

                             memory_order __m) noexcept

    { return __a->exchange(__i, __m); }

  template

    inline _ITp

    atomic_exchange_explicit(volatile atomic<_ITp>* __a, _ITp __i,

                             memory_order __m) noexcept

    { return __a->exchange(__i, __m); }

  template

    inline bool

    atomic_compare_exchange_weak_explicit(atomic<_ITp>* __a,

                                          _ITp* __i1, _ITp __i2,

                                          memory_order __m1,

                                          memory_order __m2) noexcept

    { return __a->compare_exchange_weak(*__i1, __i2, __m1, __m2); }

  template

    inline bool

    atomic_compare_exchange_weak_explicit(volatile atomic<_ITp>* __a,

                                          _ITp* __i1, _ITp __i2,

                                          memory_order __m1,

                                          memory_order __m2) noexcept

    { return __a->compare_exchange_weak(*__i1, __i2, __m1, __m2); }

  template

    inline bool

    atomic_compare_exchange_strong_explicit(atomic<_ITp>* __a,

                                            _ITp* __i1, _ITp __i2,

                                            memory_order __m1,

                                            memory_order __m2) noexcept

    { return __a->compare_exchange_strong(*__i1, __i2, __m1, __m2); }

  template

    inline bool

    atomic_compare_exchange_strong_explicit(volatile atomic<_ITp>* __a,

                                            _ITp* __i1, _ITp __i2,

                                            memory_order __m1,

                                            memory_order __m2) noexcept

    { return __a->compare_exchange_strong(*__i1, __i2, __m1, __m2); }

  template

    inline void

    atomic_store(atomic<_ITp>* __a, _ITp __i) noexcept

    { atomic_store_explicit(__a, __i, memory_order_seq_cst); }

  template

    inline void

    atomic_store(volatile atomic<_ITp>* __a, _ITp __i) noexcept

    { atomic_store_explicit(__a, __i, memory_order_seq_cst); }

  template

    inline _ITp

    atomic_load(const atomic<_ITp>* __a) noexcept

    { return atomic_load_explicit(__a, memory_order_seq_cst); }

  template

    inline _ITp

    atomic_load(const volatile atomic<_ITp>* __a) noexcept

    { return atomic_load_explicit(__a, memory_order_seq_cst); }

  template

    inline _ITp

    atomic_exchange(atomic<_ITp>* __a, _ITp __i) noexcept

    { return atomic_exchange_explicit(__a, __i, memory_order_seq_cst); }

  template

    inline _ITp

    atomic_exchange(volatile atomic<_ITp>* __a, _ITp __i) noexcept

    { return atomic_exchange_explicit(__a, __i, memory_order_seq_cst); }

  template

    inline bool

    atomic_compare_exchange_weak(atomic<_ITp>* __a,

                                 _ITp* __i1, _ITp __i2) noexcept

    {

      return atomic_compare_exchange_weak_explicit(__a, __i1, __i2,

                                                   memory_order_seq_cst,

                                                   memory_order_seq_cst);

    }

  template

    inline bool

    atomic_compare_exchange_weak(volatile atomic<_ITp>* __a,

                                 _ITp* __i1, _ITp __i2) noexcept

    {

      return atomic_compare_exchange_weak_explicit(__a, __i1, __i2,

                                                   memory_order_seq_cst,

                                                   memory_order_seq_cst);

    }