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// -*- C++ -*- header. |
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|
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// Copyright (C) 2008-2021 Free Software Foundation, Inc. |
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// |
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// This file is part of the GNU ISO C++ Library. This library is free |
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// software; you can redistribute it and/or modify it under the |
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// terms of the GNU General Public License as published by the |
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// Free Software Foundation; either version 3, or (at your option) |
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// any later version. |
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|
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// This library is distributed in the hope that it will be useful, |
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// but WITHOUT ANY WARRANTY; without even the implied warranty of |
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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// GNU General Public License for more details. |
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|
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// Under Section 7 of GPL version 3, you are granted additional |
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// permissions described in the GCC Runtime Library Exception, version |
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// 3.1, as published by the Free Software Foundation. |
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|
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// You should have received a copy of the GNU General Public License and |
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// a copy of the GCC Runtime Library Exception along with this program; |
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
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// <http://www.gnu.org/licenses/>. |
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|
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/** @file include/atomic |
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* This is a Standard C++ Library header. |
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*/ |
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|
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// Based on "C++ Atomic Types and Operations" by Hans Boehm and Lawrence Crowl. |
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// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2427.html |
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|
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#ifndef _GLIBCXX_ATOMIC |
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#define _GLIBCXX_ATOMIC 1 |
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|
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#pragma GCC system_header |
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|
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#if __cplusplus < 201103L |
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# include <bits/c++0x_warning.h> |
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#else |
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|
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#include <bits/atomic_base.h> |
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|
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namespace std _GLIBCXX_VISIBILITY(default) |
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{ |
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_GLIBCXX_BEGIN_NAMESPACE_VERSION |
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|
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/** |
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* @addtogroup atomics |
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* @{ |
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*/ |
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|
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#if __cplusplus >= 201703L |
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# define __cpp_lib_atomic_is_always_lock_free 201603 |
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#endif |
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|
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template<typename _Tp> |
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struct atomic; |
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|
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/// atomic<bool> |
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// NB: No operators or fetch-operations for this type. |
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template<> |
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struct atomic<bool> |
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{ |
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using value_type = bool; |
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|
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private: |
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__atomic_base<bool> _M_base; |
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|
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public: |
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atomic() noexcept = default; |
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~atomic() noexcept = default; |
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atomic(const atomic&) = delete; |
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atomic& operator=(const atomic&) = delete; |
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atomic& operator=(const atomic&) volatile = delete; |
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|
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constexpr atomic(bool __i) noexcept : _M_base(__i) { } |
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|
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bool |
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operator=(bool __i) noexcept |
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{ return _M_base.operator=(__i); } |
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|
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bool |
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operator=(bool __i) volatile noexcept |
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{ return _M_base.operator=(__i); } |
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|
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operator bool() const noexcept |
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{ return _M_base.load(); } |
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|
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operator bool() const volatile noexcept |
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{ return _M_base.load(); } |
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|
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bool |
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is_lock_free() const noexcept { return _M_base.is_lock_free(); } |
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|
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bool |
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is_lock_free() const volatile noexcept { return _M_base.is_lock_free(); } |
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|
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#if __cplusplus >= 201703L |
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static constexpr bool is_always_lock_free = ATOMIC_BOOL_LOCK_FREE == 2; |
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#endif |
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|
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void |
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store(bool __i, memory_order __m = memory_order_seq_cst) noexcept |
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{ _M_base.store(__i, __m); } |
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|
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void |
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store(bool __i, memory_order __m = memory_order_seq_cst) volatile noexcept |
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{ _M_base.store(__i, __m); } |
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|
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bool |
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load(memory_order __m = memory_order_seq_cst) const noexcept |
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{ return _M_base.load(__m); } |
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|
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bool |
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load(memory_order __m = memory_order_seq_cst) const volatile noexcept |
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{ return _M_base.load(__m); } |
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|
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bool |
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exchange(bool __i, memory_order __m = memory_order_seq_cst) noexcept |
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{ return _M_base.exchange(__i, __m); } |
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|
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bool |
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exchange(bool __i, |
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memory_order __m = memory_order_seq_cst) volatile noexcept |
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{ return _M_base.exchange(__i, __m); } |
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|
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bool |
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compare_exchange_weak(bool& __i1, bool __i2, memory_order __m1, |
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memory_order __m2) noexcept |
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{ return _M_base.compare_exchange_weak(__i1, __i2, __m1, __m2); } |
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|
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bool |
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compare_exchange_weak(bool& __i1, bool __i2, memory_order __m1, |
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memory_order __m2) volatile noexcept |
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{ return _M_base.compare_exchange_weak(__i1, __i2, __m1, __m2); } |
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|
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bool |
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compare_exchange_weak(bool& __i1, bool __i2, |
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memory_order __m = memory_order_seq_cst) noexcept |
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{ return _M_base.compare_exchange_weak(__i1, __i2, __m); } |
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|
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bool |
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compare_exchange_weak(bool& __i1, bool __i2, |
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memory_order __m = memory_order_seq_cst) volatile noexcept |
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{ return _M_base.compare_exchange_weak(__i1, __i2, __m); } |
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|
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bool |
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compare_exchange_strong(bool& __i1, bool __i2, memory_order __m1, |
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memory_order __m2) noexcept |
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{ return _M_base.compare_exchange_strong(__i1, __i2, __m1, __m2); } |
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|
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bool |
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compare_exchange_strong(bool& __i1, bool __i2, memory_order __m1, |
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memory_order __m2) volatile noexcept |
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{ return _M_base.compare_exchange_strong(__i1, __i2, __m1, __m2); } |
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|
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bool |
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compare_exchange_strong(bool& __i1, bool __i2, |
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memory_order __m = memory_order_seq_cst) noexcept |
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{ return _M_base.compare_exchange_strong(__i1, __i2, __m); } |
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|
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bool |
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compare_exchange_strong(bool& __i1, bool __i2, |
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memory_order __m = memory_order_seq_cst) volatile noexcept |
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{ return _M_base.compare_exchange_strong(__i1, __i2, __m); } |
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|
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#if __cpp_lib_atomic_wait |
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void |
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wait(bool __old, memory_order __m = memory_order_seq_cst) const noexcept |
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{ _M_base.wait(__old, __m); } |
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|
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// TODO add const volatile overload |
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|
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void |
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notify_one() const noexcept |
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{ _M_base.notify_one(); } |
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|
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void |
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notify_all() const noexcept |
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{ _M_base.notify_all(); } |
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#endif // __cpp_lib_atomic_wait |
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}; |
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|
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#if __cplusplus <= 201703L |
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# define _GLIBCXX20_INIT(I) |
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#else |
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# define _GLIBCXX20_INIT(I) = I |
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#endif |
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|
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/** |
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* @brief Generic atomic type, primary class template. |
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* |
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* @tparam _Tp Type to be made atomic, must be trivially copyable. |
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*/ |
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template<typename _Tp> |
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struct atomic |
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{ |
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using value_type = _Tp; |
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|
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private: |
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// Align 1/2/4/8/16-byte types to at least their size. |
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static constexpr int _S_min_alignment |
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= (sizeof(_Tp) & (sizeof(_Tp) - 1)) || sizeof(_Tp) > 16 |
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? 0 : sizeof(_Tp); |
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|
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static constexpr int _S_alignment |
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= _S_min_alignment > alignof(_Tp) ? _S_min_alignment : alignof(_Tp); |
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|
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alignas(_S_alignment) _Tp _M_i _GLIBCXX20_INIT(_Tp()); |
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|
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static_assert(__is_trivially_copyable(_Tp), |
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"std::atomic requires a trivially copyable type"); |
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|
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static_assert(sizeof(_Tp) > 0, |
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"Incomplete or zero-sized types are not supported"); |
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|
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#if __cplusplus > 201703L |
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static_assert(is_copy_constructible_v<_Tp>); |
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static_assert(is_move_constructible_v<_Tp>); |
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static_assert(is_copy_assignable_v<_Tp>); |
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static_assert(is_move_assignable_v<_Tp>); |
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#endif |
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|
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public: |
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atomic() = default; |
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~atomic() noexcept = default; |
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atomic(const atomic&) = delete; |
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atomic& operator=(const atomic&) = delete; |
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atomic& operator=(const atomic&) volatile = delete; |
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|
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constexpr atomic(_Tp __i) noexcept : _M_i(__i) { } |
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|
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operator _Tp() const noexcept |
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{ return load(); } |
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|
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operator _Tp() const volatile noexcept |
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{ return load(); } |
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|
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_Tp |
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operator=(_Tp __i) noexcept |
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{ store(__i); return __i; } |
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|
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_Tp |
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operator=(_Tp __i) volatile noexcept |
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{ store(__i); return __i; } |
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|
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bool |
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is_lock_free() const noexcept |
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{ |
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// Produce a fake, minimally aligned pointer. |
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return __atomic_is_lock_free(sizeof(_M_i), |
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reinterpret_cast<void *>(-_S_alignment)); |
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} |
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|
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bool |
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is_lock_free() const volatile noexcept |
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{ |
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// Produce a fake, minimally aligned pointer. |
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return __atomic_is_lock_free(sizeof(_M_i), |
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reinterpret_cast<void *>(-_S_alignment)); |
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} |
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|
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#if __cplusplus >= 201703L |
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static constexpr bool is_always_lock_free |
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= __atomic_always_lock_free(sizeof(_M_i), 0); |
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#endif |
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|
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void |
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store(_Tp __i, memory_order __m = memory_order_seq_cst) noexcept |
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{ |
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__atomic_store(std::__addressof(_M_i), std::__addressof(__i), int(__m)); |
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} |
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|
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void |
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store(_Tp __i, memory_order __m = memory_order_seq_cst) volatile noexcept |
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{ |
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__atomic_store(std::__addressof(_M_i), std::__addressof(__i), int(__m)); |
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} |
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|
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_Tp |
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load(memory_order __m = memory_order_seq_cst) const noexcept |
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{ |
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alignas(_Tp) unsigned char __buf[sizeof(_Tp)]; |
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_Tp* __ptr = reinterpret_cast<_Tp*>(__buf); |
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__atomic_load(std::__addressof(_M_i), __ptr, int(__m)); |
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return *__ptr; |
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} |
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|
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_Tp |
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load(memory_order __m = memory_order_seq_cst) const volatile noexcept |
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{ |
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alignas(_Tp) unsigned char __buf[sizeof(_Tp)]; |
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_Tp* __ptr = reinterpret_cast<_Tp*>(__buf); |
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__atomic_load(std::__addressof(_M_i), __ptr, int(__m)); |
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return *__ptr; |
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} |
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|
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_Tp |
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exchange(_Tp __i, memory_order __m = memory_order_seq_cst) noexcept |
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{ |
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alignas(_Tp) unsigned char __buf[sizeof(_Tp)]; |
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_Tp* __ptr = reinterpret_cast<_Tp*>(__buf); |
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__atomic_exchange(std::__addressof(_M_i), std::__addressof(__i), |
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__ptr, int(__m)); |
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return *__ptr; |
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} |
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|
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_Tp |
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exchange(_Tp __i, |
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memory_order __m = memory_order_seq_cst) volatile noexcept |
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{ |
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alignas(_Tp) unsigned char __buf[sizeof(_Tp)]; |
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_Tp* __ptr = reinterpret_cast<_Tp*>(__buf); |
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__atomic_exchange(std::__addressof(_M_i), std::__addressof(__i), |
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__ptr, int(__m)); |
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return *__ptr; |
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} |
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|
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bool |
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compare_exchange_weak(_Tp& __e, _Tp __i, memory_order __s, |
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memory_order __f) noexcept |
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{ |
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return __atomic_compare_exchange(std::__addressof(_M_i), |
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std::__addressof(__e), |
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std::__addressof(__i), |
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true, int(__s), int(__f)); |
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} |
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|
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bool |
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compare_exchange_weak(_Tp& __e, _Tp __i, memory_order __s, |
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memory_order __f) volatile noexcept |
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{ |
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return __atomic_compare_exchange(std::__addressof(_M_i), |
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std::__addressof(__e), |
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std::__addressof(__i), |
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true, int(__s), int(__f)); |
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} |
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|
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bool |
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compare_exchange_weak(_Tp& __e, _Tp __i, |
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memory_order __m = memory_order_seq_cst) noexcept |
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{ return compare_exchange_weak(__e, __i, __m, |
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__cmpexch_failure_order(__m)); } |
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|
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bool |
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compare_exchange_weak(_Tp& __e, _Tp __i, |
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memory_order __m = memory_order_seq_cst) volatile noexcept |
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{ return compare_exchange_weak(__e, __i, __m, |
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__cmpexch_failure_order(__m)); } |
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|
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bool |
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compare_exchange_strong(_Tp& __e, _Tp __i, memory_order __s, |
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memory_order __f) noexcept |
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{ |
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return __atomic_compare_exchange(std::__addressof(_M_i), |
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std::__addressof(__e), |
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std::__addressof(__i), |
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false, int(__s), int(__f)); |
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} |
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|
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bool |
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compare_exchange_strong(_Tp& __e, _Tp __i, memory_order __s, |
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memory_order __f) volatile noexcept |
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{ |
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return __atomic_compare_exchange(std::__addressof(_M_i), |
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std::__addressof(__e), |
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std::__addressof(__i), |
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false, int(__s), int(__f)); |
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} |
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|
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bool |
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compare_exchange_strong(_Tp& __e, _Tp __i, |
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memory_order __m = memory_order_seq_cst) noexcept |
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{ return compare_exchange_strong(__e, __i, __m, |
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__cmpexch_failure_order(__m)); } |
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|
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bool |
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compare_exchange_strong(_Tp& __e, _Tp __i, |
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memory_order __m = memory_order_seq_cst) volatile noexcept |
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{ return compare_exchange_strong(__e, __i, __m, |
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__cmpexch_failure_order(__m)); } |
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|
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#if __cpp_lib_atomic_wait |
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void |
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wait(_Tp __old, memory_order __m = memory_order_seq_cst) const noexcept |
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{ |
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std::__atomic_wait_address_v(&_M_i, __old, |
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[__m, this] { return this->load(__m); }); |
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} |
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|
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// TODO add const volatile overload |
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|
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void |
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notify_one() const noexcept |
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{ std::__atomic_notify_address(&_M_i, false); } |
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|
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void |
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notify_all() const noexcept |
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{ std::__atomic_notify_address(&_M_i, true); } |
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#endif // __cpp_lib_atomic_wait |
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|
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}; |
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#undef _GLIBCXX20_INIT |
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|
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/// Partial specialization for pointer types. |
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template<typename _Tp> |
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struct atomic<_Tp*> |
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{ |
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using value_type = _Tp*; |
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using difference_type = ptrdiff_t; |
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|
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typedef _Tp* __pointer_type; |
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typedef __atomic_base<_Tp*> __base_type; |
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__base_type _M_b; |
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|
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atomic() noexcept = default; |
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~atomic() noexcept = default; |
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atomic(const atomic&) = delete; |
| 419 |
atomic& operator=(const atomic&) = delete; |
| 420 |
atomic& operator=(const atomic&) volatile = delete; |
| 421 |
|
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constexpr atomic(__pointer_type __p) noexcept : _M_b(__p) { } |
| 423 |
|
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operator __pointer_type() const noexcept |
| 425 |
{ return __pointer_type(_M_b); } |
| 426 |
|
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operator __pointer_type() const volatile noexcept |
| 428 |
{ return __pointer_type(_M_b); } |
| 429 |
|
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__pointer_type |
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operator=(__pointer_type __p) noexcept |
| 432 |
{ return _M_b.operator=(__p); } |
| 433 |
|
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__pointer_type |
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operator=(__pointer_type __p) volatile noexcept |
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{ return _M_b.operator=(__p); } |
| 437 |
|
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__pointer_type |
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operator++(int) noexcept |
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{ |
| 441 |
#if __cplusplus >= 201703L |
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static_assert( is_object<_Tp>::value, "pointer to object type" ); |
| 443 |
#endif |
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return _M_b++; |
| 445 |
} |
| 446 |
|
| 447 |
__pointer_type |
| 448 |
operator++(int) volatile noexcept |
| 449 |
{ |
| 450 |
#if __cplusplus >= 201703L |
| 451 |
static_assert( is_object<_Tp>::value, "pointer to object type" ); |
| 452 |
#endif |
| 453 |
return _M_b++; |
| 454 |
} |
| 455 |
|
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__pointer_type |
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operator--(int) noexcept |
| 458 |
{ |
| 459 |
#if __cplusplus >= 201703L |
| 460 |
static_assert( is_object<_Tp>::value, "pointer to object type" ); |
| 461 |
#endif |
| 462 |
return _M_b--; |
| 463 |
} |
| 464 |
|
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__pointer_type |
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operator--(int) volatile noexcept |
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{ |
| 468 |
#if __cplusplus >= 201703L |
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static_assert( is_object<_Tp>::value, "pointer to object type" ); |
| 470 |
#endif |
| 471 |
return _M_b--; |
| 472 |
} |
| 473 |
|
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__pointer_type |
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operator++() noexcept |
| 476 |
{ |
| 477 |
#if __cplusplus >= 201703L |
| 478 |
static_assert( is_object<_Tp>::value, "pointer to object type" ); |
| 479 |
#endif |
| 480 |
return ++_M_b; |
| 481 |
} |
| 482 |
|
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__pointer_type |
| 484 |
operator++() volatile noexcept |
| 485 |
{ |
| 486 |
#if __cplusplus >= 201703L |
| 487 |
static_assert( is_object<_Tp>::value, "pointer to object type" ); |
| 488 |
#endif |
| 489 |
return ++_M_b; |
| 490 |
} |
| 491 |
|
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__pointer_type |
| 493 |
operator--() noexcept |
| 494 |
{ |
| 495 |
#if __cplusplus >= 201703L |
| 496 |
static_assert( is_object<_Tp>::value, "pointer to object type" ); |
| 497 |
#endif |
| 498 |
return --_M_b; |
| 499 |
} |
| 500 |
|
| 501 |
__pointer_type |
| 502 |
operator--() volatile noexcept |
| 503 |
{ |
| 504 |
#if __cplusplus >= 201703L |
| 505 |
static_assert( is_object<_Tp>::value, "pointer to object type" ); |
| 506 |
#endif |
| 507 |
return --_M_b; |
| 508 |
} |
| 509 |
|
| 510 |
__pointer_type |
| 511 |
operator+=(ptrdiff_t __d) noexcept |
| 512 |
{ |
| 513 |
#if __cplusplus >= 201703L |
| 514 |
static_assert( is_object<_Tp>::value, "pointer to object type" ); |
| 515 |
#endif |
| 516 |
return _M_b.operator+=(__d); |
| 517 |
} |
| 518 |
|
| 519 |
__pointer_type |
| 520 |
operator+=(ptrdiff_t __d) volatile noexcept |
| 521 |
{ |
| 522 |
#if __cplusplus >= 201703L |
| 523 |
static_assert( is_object<_Tp>::value, "pointer to object type" ); |
| 524 |
#endif |
| 525 |
return _M_b.operator+=(__d); |
| 526 |
} |
| 527 |
|
| 528 |
__pointer_type |
| 529 |
operator-=(ptrdiff_t __d) noexcept |
| 530 |
{ |
| 531 |
#if __cplusplus >= 201703L |
| 532 |
static_assert( is_object<_Tp>::value, "pointer to object type" ); |
| 533 |
#endif |
| 534 |
return _M_b.operator-=(__d); |
| 535 |
} |
| 536 |
|
| 537 |
__pointer_type |
| 538 |
operator-=(ptrdiff_t __d) volatile noexcept |
| 539 |
{ |
| 540 |
#if __cplusplus >= 201703L |
| 541 |
static_assert( is_object<_Tp>::value, "pointer to object type" ); |
| 542 |
#endif |
| 543 |
return _M_b.operator-=(__d); |
| 544 |
} |
| 545 |
|
| 546 |
bool |
| 547 |
is_lock_free() const noexcept |
| 548 |
{ return _M_b.is_lock_free(); } |
| 549 |
|
| 550 |
bool |
| 551 |
is_lock_free() const volatile noexcept |
| 552 |
{ return _M_b.is_lock_free(); } |
| 553 |
|
| 554 |
#if __cplusplus >= 201703L |
| 555 |
static constexpr bool is_always_lock_free = ATOMIC_POINTER_LOCK_FREE == 2; |
| 556 |
#endif |
| 557 |
|
| 558 |
void |
| 559 |
store(__pointer_type __p, |
| 560 |
memory_order __m = memory_order_seq_cst) noexcept |
| 561 |
{ return _M_b.store(__p, __m); } |
| 562 |
|
| 563 |
void |
| 564 |
store(__pointer_type __p, |
| 565 |
memory_order __m = memory_order_seq_cst) volatile noexcept |
| 566 |
{ return _M_b.store(__p, __m); } |
| 567 |
|
| 568 |
__pointer_type |
| 569 |
load(memory_order __m = memory_order_seq_cst) const noexcept |
| 570 |
{ return _M_b.load(__m); } |
| 571 |
|
| 572 |
__pointer_type |
| 573 |
load(memory_order __m = memory_order_seq_cst) const volatile noexcept |
| 574 |
{ return _M_b.load(__m); } |
| 575 |
|
| 576 |
__pointer_type |
| 577 |
exchange(__pointer_type __p, |
| 578 |
memory_order __m = memory_order_seq_cst) noexcept |
| 579 |
{ return _M_b.exchange(__p, __m); } |
| 580 |
|
| 581 |
__pointer_type |
| 582 |
exchange(__pointer_type __p, |
| 583 |
memory_order __m = memory_order_seq_cst) volatile noexcept |
| 584 |
{ return _M_b.exchange(__p, __m); } |
| 585 |
|
| 586 |
bool |
| 587 |
compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2, |
| 588 |
memory_order __m1, memory_order __m2) noexcept |
| 589 |
{ return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); } |
| 590 |
|
| 591 |
bool |
| 592 |
compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2, |
| 593 |
memory_order __m1, |
| 594 |
memory_order __m2) volatile noexcept |
| 595 |
{ return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); } |
| 596 |
|
| 597 |
bool |
| 598 |
compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2, |
| 599 |
memory_order __m = memory_order_seq_cst) noexcept |
| 600 |
{ |
| 601 |
return compare_exchange_weak(__p1, __p2, __m, |
| 602 |
__cmpexch_failure_order(__m)); |
| 603 |
} |
| 604 |
|
| 605 |
bool |
| 606 |
compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2, |
| 607 |
memory_order __m = memory_order_seq_cst) volatile noexcept |
| 608 |
{ |
| 609 |
return compare_exchange_weak(__p1, __p2, __m, |
| 610 |
__cmpexch_failure_order(__m)); |
| 611 |
} |
| 612 |
|
| 613 |
bool |
| 614 |
compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2, |
| 615 |
memory_order __m1, memory_order __m2) noexcept |
| 616 |
{ return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); } |
| 617 |
|
| 618 |
bool |
| 619 |
compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2, |
| 620 |
memory_order __m1, |
| 621 |
memory_order __m2) volatile noexcept |
| 622 |
{ return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); } |
| 623 |
|
| 624 |
bool |
| 625 |
compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2, |
| 626 |
memory_order __m = memory_order_seq_cst) noexcept |
| 627 |
{ |
| 628 |
return _M_b.compare_exchange_strong(__p1, __p2, __m, |
| 629 |
__cmpexch_failure_order(__m)); |
| 630 |
} |
| 631 |
|
| 632 |
bool |
| 633 |
compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2, |
| 634 |
memory_order __m = memory_order_seq_cst) volatile noexcept |
| 635 |
{ |
| 636 |
return _M_b.compare_exchange_strong(__p1, __p2, __m, |
| 637 |
__cmpexch_failure_order(__m)); |
| 638 |
} |
| 639 |
|
| 640 |
#if __cpp_lib_atomic_wait |
| 641 |
void |
| 642 |
wait(__pointer_type __old, memory_order __m = memory_order_seq_cst) noexcept |
| 643 |
{ _M_b.wait(__old, __m); } |
| 644 |
|
| 645 |
// TODO add const volatile overload |
| 646 |
|
| 647 |
void |
| 648 |
notify_one() const noexcept |
| 649 |
{ _M_b.notify_one(); } |
| 650 |
|
| 651 |
void |
| 652 |
notify_all() const noexcept |
| 653 |
{ _M_b.notify_all(); } |
| 654 |
#endif // __cpp_lib_atomic_wait |
| 655 |
__pointer_type |
| 656 |
fetch_add(ptrdiff_t __d, |
| 657 |
memory_order __m = memory_order_seq_cst) noexcept |
| 658 |
{ |
| 659 |
#if __cplusplus >= 201703L |
| 660 |
static_assert( is_object<_Tp>::value, "pointer to object type" ); |
| 661 |
#endif |
| 662 |
return _M_b.fetch_add(__d, __m); |
| 663 |
} |
| 664 |
|
| 665 |
__pointer_type |
| 666 |
fetch_add(ptrdiff_t __d, |
| 667 |
memory_order __m = memory_order_seq_cst) volatile noexcept |
| 668 |
{ |
| 669 |
#if __cplusplus >= 201703L |
| 670 |
static_assert( is_object<_Tp>::value, "pointer to object type" ); |
| 671 |
#endif |
| 672 |
return _M_b.fetch_add(__d, __m); |
| 673 |
} |
| 674 |
|
| 675 |
__pointer_type |
| 676 |
fetch_sub(ptrdiff_t __d, |
| 677 |
memory_order __m = memory_order_seq_cst) noexcept |
| 678 |
{ |
| 679 |
#if __cplusplus >= 201703L |
| 680 |
static_assert( is_object<_Tp>::value, "pointer to object type" ); |
| 681 |
#endif |
| 682 |
return _M_b.fetch_sub(__d, __m); |
| 683 |
} |
| 684 |
|
| 685 |
__pointer_type |
| 686 |
fetch_sub(ptrdiff_t __d, |
| 687 |
memory_order __m = memory_order_seq_cst) volatile noexcept |
| 688 |
{ |
| 689 |
#if __cplusplus >= 201703L |
| 690 |
static_assert( is_object<_Tp>::value, "pointer to object type" ); |
| 691 |
#endif |
| 692 |
return _M_b.fetch_sub(__d, __m); |
| 693 |
} |
| 694 |
}; |
| 695 |
|
| 696 |
|
| 697 |
/// Explicit specialization for char. |
| 698 |
template<> |
| 699 |
struct atomic<char> : __atomic_base<char> |
| 700 |
{ |
| 701 |
typedef char __integral_type; |
| 702 |
typedef __atomic_base<char> __base_type; |
| 703 |
|
| 704 |
atomic() noexcept = default; |
| 705 |
~atomic() noexcept = default; |
| 706 |
atomic(const atomic&) = delete; |
| 707 |
atomic& operator=(const atomic&) = delete; |
| 708 |
atomic& operator=(const atomic&) volatile = delete; |
| 709 |
|
| 710 |
constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { } |
| 711 |
|
| 712 |
using __base_type::operator __integral_type; |
| 713 |
using __base_type::operator=; |
| 714 |
|
| 715 |
#if __cplusplus >= 201703L |
| 716 |
static constexpr bool is_always_lock_free = ATOMIC_CHAR_LOCK_FREE == 2; |
| 717 |
#endif |
| 718 |
}; |
| 719 |
|
| 720 |
/// Explicit specialization for signed char. |
| 721 |
template<> |
| 722 |
struct atomic<signed char> : __atomic_base<signed char> |
| 723 |
{ |
| 724 |
typedef signed char __integral_type; |
| 725 |
typedef __atomic_base<signed char> __base_type; |
| 726 |
|
| 727 |
atomic() noexcept= default; |
| 728 |
~atomic() noexcept = default; |
| 729 |
atomic(const atomic&) = delete; |
| 730 |
atomic& operator=(const atomic&) = delete; |
| 731 |
atomic& operator=(const atomic&) volatile = delete; |
| 732 |
|
| 733 |
constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { } |
| 734 |
|
| 735 |
using __base_type::operator __integral_type; |
| 736 |
using __base_type::operator=; |
| 737 |
|
| 738 |
#if __cplusplus >= 201703L |
| 739 |
static constexpr bool is_always_lock_free = ATOMIC_CHAR_LOCK_FREE == 2; |
| 740 |
#endif |
| 741 |
}; |
| 742 |
|
| 743 |
/// Explicit specialization for unsigned char. |
| 744 |
template<> |
| 745 |
struct atomic<unsigned char> : __atomic_base<unsigned char> |
| 746 |
{ |
| 747 |
typedef unsigned char __integral_type; |
| 748 |
typedef __atomic_base<unsigned char> __base_type; |
| 749 |
|
| 750 |
atomic() noexcept= default; |
| 751 |
~atomic() noexcept = default; |
| 752 |
atomic(const atomic&) = delete; |
| 753 |
atomic& operator=(const atomic&) = delete; |
| 754 |
atomic& operator=(const atomic&) volatile = delete; |
| 755 |
|
| 756 |
constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { } |
| 757 |
|
| 758 |
using __base_type::operator __integral_type; |
| 759 |
using __base_type::operator=; |
| 760 |
|
| 761 |
#if __cplusplus >= 201703L |
| 762 |
static constexpr bool is_always_lock_free = ATOMIC_CHAR_LOCK_FREE == 2; |
| 763 |
#endif |
| 764 |
}; |
| 765 |
|
| 766 |
/// Explicit specialization for short. |
| 767 |
template<> |
| 768 |
struct atomic<short> : __atomic_base<short> |
| 769 |
{ |
| 770 |
typedef short __integral_type; |
| 771 |
typedef __atomic_base<short> __base_type; |
| 772 |
|
| 773 |
atomic() noexcept = default; |
| 774 |
~atomic() noexcept = default; |
| 775 |
atomic(const atomic&) = delete; |
| 776 |
atomic& operator=(const atomic&) = delete; |
| 777 |
atomic& operator=(const atomic&) volatile = delete; |
| 778 |
|
| 779 |
constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { } |
| 780 |
|
| 781 |
using __base_type::operator __integral_type; |
| 782 |
using __base_type::operator=; |
| 783 |
|
| 784 |
#if __cplusplus >= 201703L |
| 785 |
static constexpr bool is_always_lock_free = ATOMIC_SHORT_LOCK_FREE == 2; |
| 786 |
#endif |
| 787 |
}; |
| 788 |
|
| 789 |
/// Explicit specialization for unsigned short. |
| 790 |
template<> |
| 791 |
struct atomic<unsigned short> : __atomic_base<unsigned short> |
| 792 |
{ |
| 793 |
typedef unsigned short __integral_type; |
| 794 |
typedef __atomic_base<unsigned short> __base_type; |
| 795 |
|
| 796 |
atomic() noexcept = default; |
| 797 |
~atomic() noexcept = default; |
| 798 |
atomic(const atomic&) = delete; |
| 799 |
atomic& operator=(const atomic&) = delete; |
| 800 |
atomic& operator=(const atomic&) volatile = delete; |
| 801 |
|
| 802 |
constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { } |
| 803 |
|
| 804 |
using __base_type::operator __integral_type; |
| 805 |
using __base_type::operator=; |
| 806 |
|
| 807 |
#if __cplusplus >= 201703L |
| 808 |
static constexpr bool is_always_lock_free = ATOMIC_SHORT_LOCK_FREE == 2; |
| 809 |
#endif |
| 810 |
}; |
| 811 |
|
| 812 |
/// Explicit specialization for int. |
| 813 |
template<> |
| 814 |
struct atomic<int> : __atomic_base<int> |
| 815 |
{ |
| 816 |
typedef int __integral_type; |
| 817 |
typedef __atomic_base<int> __base_type; |
| 818 |
|
| 819 |
atomic() noexcept = default; |
| 820 |
~atomic() noexcept = default; |
| 821 |
atomic(const atomic&) = delete; |
| 822 |
atomic& operator=(const atomic&) = delete; |
| 823 |
atomic& operator=(const atomic&) volatile = delete; |
| 824 |
|
| 825 |
constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { } |
| 826 |
|
| 827 |
using __base_type::operator __integral_type; |
| 828 |
using __base_type::operator=; |
| 829 |
|
| 830 |
#if __cplusplus >= 201703L |
| 831 |
static constexpr bool is_always_lock_free = ATOMIC_INT_LOCK_FREE == 2; |
| 832 |
#endif |
| 833 |
}; |
| 834 |
|
| 835 |
/// Explicit specialization for unsigned int. |
| 836 |
template<> |
| 837 |
struct atomic<unsigned int> : __atomic_base<unsigned int> |
| 838 |
{ |
| 839 |
typedef unsigned int __integral_type; |
| 840 |
typedef __atomic_base<unsigned int> __base_type; |
| 841 |
|
| 842 |
atomic() noexcept = default; |
| 843 |
~atomic() noexcept = default; |
| 844 |
atomic(const atomic&) = delete; |
| 845 |
atomic& operator=(const atomic&) = delete; |
| 846 |
atomic& operator=(const atomic&) volatile = delete; |
| 847 |
|
| 848 |
constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { } |
| 849 |
|
| 850 |
using __base_type::operator __integral_type; |
| 851 |
using __base_type::operator=; |
| 852 |
|
| 853 |
#if __cplusplus >= 201703L |
| 854 |
static constexpr bool is_always_lock_free = ATOMIC_INT_LOCK_FREE == 2; |
| 855 |
#endif |
| 856 |
}; |
| 857 |
|
| 858 |
/// Explicit specialization for long. |
| 859 |
template<> |
| 860 |
struct atomic<long> : __atomic_base<long> |
| 861 |
{ |
| 862 |
typedef long __integral_type; |
| 863 |
typedef __atomic_base<long> __base_type; |
| 864 |
|
| 865 |
atomic() noexcept = default; |
| 866 |
~atomic() noexcept = default; |
| 867 |
atomic(const atomic&) = delete; |
| 868 |
atomic& operator=(const atomic&) = delete; |
| 869 |
atomic& operator=(const atomic&) volatile = delete; |
| 870 |
|
| 871 |
constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { } |
| 872 |
|
| 873 |
using __base_type::operator __integral_type; |
| 874 |
using __base_type::operator=; |
| 875 |
|
| 876 |
#if __cplusplus >= 201703L |
| 877 |
static constexpr bool is_always_lock_free = ATOMIC_LONG_LOCK_FREE == 2; |
| 878 |
#endif |
| 879 |
}; |
| 880 |
|
| 881 |
/// Explicit specialization for unsigned long. |
| 882 |
template<> |
| 883 |
struct atomic<unsigned long> : __atomic_base<unsigned long> |
| 884 |
{ |
| 885 |
typedef unsigned long __integral_type; |
| 886 |
typedef __atomic_base<unsigned long> __base_type; |
| 887 |
|
| 888 |
atomic() noexcept = default; |
| 889 |
~atomic() noexcept = default; |
| 890 |
atomic(const atomic&) = delete; |
| 891 |
atomic& operator=(const atomic&) = delete; |
| 892 |
atomic& operator=(const atomic&) volatile = delete; |
| 893 |
|
| 894 |
constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { } |
| 895 |
|
| 896 |
using __base_type::operator __integral_type; |
| 897 |
using __base_type::operator=; |
| 898 |
|
| 899 |
#if __cplusplus >= 201703L |
| 900 |
static constexpr bool is_always_lock_free = ATOMIC_LONG_LOCK_FREE == 2; |
| 901 |
#endif |
| 902 |
}; |
| 903 |
|
| 904 |
/// Explicit specialization for long long. |
| 905 |
template<> |
| 906 |
struct atomic<long long> : __atomic_base<long long> |
| 907 |
{ |
| 908 |
typedef long long __integral_type; |
| 909 |
typedef __atomic_base<long long> __base_type; |
| 910 |
|
| 911 |
atomic() noexcept = default; |
| 912 |
~atomic() noexcept = default; |
| 913 |
atomic(const atomic&) = delete; |
| 914 |
atomic& operator=(const atomic&) = delete; |
| 915 |
atomic& operator=(const atomic&) volatile = delete; |
| 916 |
|
| 917 |
constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { } |
| 918 |
|
| 919 |
using __base_type::operator __integral_type; |
| 920 |
using __base_type::operator=; |
| 921 |
|
| 922 |
#if __cplusplus >= 201703L |
| 923 |
static constexpr bool is_always_lock_free = ATOMIC_LLONG_LOCK_FREE == 2; |
| 924 |
#endif |
| 925 |
}; |
| 926 |
|
| 927 |
/// Explicit specialization for unsigned long long. |
| 928 |
template<> |
| 929 |
struct atomic<unsigned long long> : __atomic_base<unsigned long long> |
| 930 |
{ |
| 931 |
typedef unsigned long long __integral_type; |
| 932 |
typedef __atomic_base<unsigned long long> __base_type; |
| 933 |
|
| 934 |
atomic() noexcept = default; |
| 935 |
~atomic() noexcept = default; |
| 936 |
atomic(const atomic&) = delete; |
| 937 |
atomic& operator=(const atomic&) = delete; |
| 938 |
atomic& operator=(const atomic&) volatile = delete; |
| 939 |
|
| 940 |
constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { } |
| 941 |
|
| 942 |
using __base_type::operator __integral_type; |
| 943 |
using __base_type::operator=; |
| 944 |
|
| 945 |
#if __cplusplus >= 201703L |
| 946 |
static constexpr bool is_always_lock_free = ATOMIC_LLONG_LOCK_FREE == 2; |
| 947 |
#endif |
| 948 |
}; |
| 949 |
|
| 950 |
/// Explicit specialization for wchar_t. |
| 951 |
template<> |
| 952 |
struct atomic<wchar_t> : __atomic_base<wchar_t> |
| 953 |
{ |
| 954 |
typedef wchar_t __integral_type; |
| 955 |
typedef __atomic_base<wchar_t> __base_type; |
| 956 |
|
| 957 |
atomic() noexcept = default; |
| 958 |
~atomic() noexcept = default; |
| 959 |
atomic(const atomic&) = delete; |
| 960 |
atomic& operator=(const atomic&) = delete; |
| 961 |
atomic& operator=(const atomic&) volatile = delete; |
| 962 |
|
| 963 |
constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { } |
| 964 |
|
| 965 |
using __base_type::operator __integral_type; |
| 966 |
using __base_type::operator=; |
| 967 |
|
| 968 |
#if __cplusplus >= 201703L |
| 969 |
static constexpr bool is_always_lock_free = ATOMIC_WCHAR_T_LOCK_FREE == 2; |
| 970 |
#endif |
| 971 |
}; |
| 972 |
|
| 973 |
#ifdef _GLIBCXX_USE_CHAR8_T |
| 974 |
/// Explicit specialization for char8_t. |
| 975 |
template<> |
| 976 |
struct atomic<char8_t> : __atomic_base<char8_t> |
| 977 |
{ |
| 978 |
typedef char8_t __integral_type; |
| 979 |
typedef __atomic_base<char8_t> __base_type; |
| 980 |
|
| 981 |
atomic() noexcept = default; |
| 982 |
~atomic() noexcept = default; |
| 983 |
atomic(const atomic&) = delete; |
| 984 |
atomic& operator=(const atomic&) = delete; |
| 985 |
atomic& operator=(const atomic&) volatile = delete; |
| 986 |
|
| 987 |
constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { } |
| 988 |
|
| 989 |
using __base_type::operator __integral_type; |
| 990 |
using __base_type::operator=; |
| 991 |
|
| 992 |
#if __cplusplus > 201402L |
| 993 |
static constexpr bool is_always_lock_free = ATOMIC_CHAR8_T_LOCK_FREE == 2; |
| 994 |
#endif |
| 995 |
}; |
| 996 |
#endif |
| 997 |
|
| 998 |
/// Explicit specialization for char16_t. |
| 999 |
template<> |
| 1000 |
struct atomic<char16_t> : __atomic_base<char16_t> |
| 1001 |
{ |
| 1002 |
typedef char16_t __integral_type; |
| 1003 |
typedef __atomic_base<char16_t> __base_type; |
| 1004 |
|
| 1005 |
atomic() noexcept = default; |
| 1006 |
~atomic() noexcept = default; |
| 1007 |
atomic(const atomic&) = delete; |
| 1008 |
atomic& operator=(const atomic&) = delete; |
| 1009 |
atomic& operator=(const atomic&) volatile = delete; |
| 1010 |
|
| 1011 |
constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { } |
| 1012 |
|
| 1013 |
using __base_type::operator __integral_type; |
| 1014 |
using __base_type::operator=; |
| 1015 |
|
| 1016 |
#if __cplusplus >= 201703L |
| 1017 |
static constexpr bool is_always_lock_free = ATOMIC_CHAR16_T_LOCK_FREE == 2; |
| 1018 |
#endif |
| 1019 |
}; |
| 1020 |
|
| 1021 |
/// Explicit specialization for char32_t. |
| 1022 |
template<> |
| 1023 |
struct atomic<char32_t> : __atomic_base<char32_t> |
| 1024 |
{ |
| 1025 |
typedef char32_t __integral_type; |
| 1026 |
typedef __atomic_base<char32_t> __base_type; |
| 1027 |
|
| 1028 |
atomic() noexcept = default; |
| 1029 |
~atomic() noexcept = default; |
| 1030 |
atomic(const atomic&) = delete; |
| 1031 |
atomic& operator=(const atomic&) = delete; |
| 1032 |
atomic& operator=(const atomic&) volatile = delete; |
| 1033 |
|
| 1034 |
constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { } |
| 1035 |
|
| 1036 |
using __base_type::operator __integral_type; |
| 1037 |
using __base_type::operator=; |
| 1038 |
|
| 1039 |
#if __cplusplus >= 201703L |
| 1040 |
static constexpr bool is_always_lock_free = ATOMIC_CHAR32_T_LOCK_FREE == 2; |
| 1041 |
#endif |
| 1042 |
}; |
| 1043 |
|
| 1044 |
|
| 1045 |
/// atomic_bool |
| 1046 |
typedef atomic<bool> atomic_bool; |
| 1047 |
|
| 1048 |
/// atomic_char |
| 1049 |
typedef atomic<char> atomic_char; |
| 1050 |
|
| 1051 |
/// atomic_schar |
| 1052 |
typedef atomic<signed char> atomic_schar; |
| 1053 |
|
| 1054 |
/// atomic_uchar |
| 1055 |
typedef atomic<unsigned char> atomic_uchar; |
| 1056 |
|
| 1057 |
/// atomic_short |
| 1058 |
typedef atomic<short> atomic_short; |
| 1059 |
|
| 1060 |
/// atomic_ushort |
| 1061 |
typedef atomic<unsigned short> atomic_ushort; |
| 1062 |
|
| 1063 |
/// atomic_int |
| 1064 |
typedef atomic<int> atomic_int; |
| 1065 |
|
| 1066 |
/// atomic_uint |
| 1067 |
typedef atomic<unsigned int> atomic_uint; |
| 1068 |
|
| 1069 |
/// atomic_long |
| 1070 |
typedef atomic<long> atomic_long; |
| 1071 |
|
| 1072 |
/// atomic_ulong |
| 1073 |
typedef atomic<unsigned long> atomic_ulong; |
| 1074 |
|
| 1075 |
/// atomic_llong |
| 1076 |
typedef atomic<long long> atomic_llong; |
| 1077 |
|
| 1078 |
/// atomic_ullong |
| 1079 |
typedef atomic<unsigned long long> atomic_ullong; |
| 1080 |
|
| 1081 |
/// atomic_wchar_t |
| 1082 |
typedef atomic<wchar_t> atomic_wchar_t; |
| 1083 |
|
| 1084 |
#ifdef _GLIBCXX_USE_CHAR8_T |
| 1085 |
/// atomic_char8_t |
| 1086 |
typedef atomic<char8_t> atomic_char8_t; |
| 1087 |
#endif |
| 1088 |
|
| 1089 |
/// atomic_char16_t |
| 1090 |
typedef atomic<char16_t> atomic_char16_t; |
| 1091 |
|
| 1092 |
/// atomic_char32_t |
| 1093 |
typedef atomic<char32_t> atomic_char32_t; |
| 1094 |
|
| 1095 |
#ifdef _GLIBCXX_USE_C99_STDINT_TR1 |
| 1096 |
// _GLIBCXX_RESOLVE_LIB_DEFECTS |
| 1097 |
// 2441. Exact-width atomic typedefs should be provided |
| 1098 |
|
| 1099 |
/// atomic_int8_t |
| 1100 |
typedef atomic<int8_t> atomic_int8_t; |
| 1101 |
|
| 1102 |
/// atomic_uint8_t |
| 1103 |
typedef atomic<uint8_t> atomic_uint8_t; |
| 1104 |
|
| 1105 |
/// atomic_int16_t |
| 1106 |
typedef atomic<int16_t> atomic_int16_t; |
| 1107 |
|
| 1108 |
/// atomic_uint16_t |
| 1109 |
typedef atomic<uint16_t> atomic_uint16_t; |
| 1110 |
|
| 1111 |
/// atomic_int32_t |
| 1112 |
typedef atomic<int32_t> atomic_int32_t; |
| 1113 |
|
| 1114 |
/// atomic_uint32_t |
| 1115 |
typedef atomic<uint32_t> atomic_uint32_t; |
| 1116 |
|
| 1117 |
/// atomic_int64_t |
| 1118 |
typedef atomic<int64_t> atomic_int64_t; |
| 1119 |
|
| 1120 |
/// atomic_uint64_t |
| 1121 |
typedef atomic<uint64_t> atomic_uint64_t; |
| 1122 |
|
| 1123 |
|
| 1124 |
/// atomic_int_least8_t |
| 1125 |
typedef atomic<int_least8_t> atomic_int_least8_t; |
| 1126 |
|
| 1127 |
/// atomic_uint_least8_t |
| 1128 |
typedef atomic<uint_least8_t> atomic_uint_least8_t; |
| 1129 |
|
| 1130 |
/// atomic_int_least16_t |
| 1131 |
typedef atomic<int_least16_t> atomic_int_least16_t; |
| 1132 |
|
| 1133 |
/// atomic_uint_least16_t |
| 1134 |
typedef atomic<uint_least16_t> atomic_uint_least16_t; |
| 1135 |
|
| 1136 |
/// atomic_int_least32_t |
| 1137 |
typedef atomic<int_least32_t> atomic_int_least32_t; |
| 1138 |
|
| 1139 |
/// atomic_uint_least32_t |
| 1140 |
typedef atomic<uint_least32_t> atomic_uint_least32_t; |
| 1141 |
|
| 1142 |
/// atomic_int_least64_t |
| 1143 |
typedef atomic<int_least64_t> atomic_int_least64_t; |
| 1144 |
|
| 1145 |
/// atomic_uint_least64_t |
| 1146 |
typedef atomic<uint_least64_t> atomic_uint_least64_t; |
| 1147 |
|
| 1148 |
|
| 1149 |
/// atomic_int_fast8_t |
| 1150 |
typedef atomic<int_fast8_t> atomic_int_fast8_t; |
| 1151 |
|
| 1152 |
/// atomic_uint_fast8_t |
| 1153 |
typedef atomic<uint_fast8_t> atomic_uint_fast8_t; |
| 1154 |
|
| 1155 |
/// atomic_int_fast16_t |
| 1156 |
typedef atomic<int_fast16_t> atomic_int_fast16_t; |
| 1157 |
|
| 1158 |
/// atomic_uint_fast16_t |
| 1159 |
typedef atomic<uint_fast16_t> atomic_uint_fast16_t; |
| 1160 |
|
| 1161 |
/// atomic_int_fast32_t |
| 1162 |
typedef atomic<int_fast32_t> atomic_int_fast32_t; |
| 1163 |
|
| 1164 |
/// atomic_uint_fast32_t |
| 1165 |
typedef atomic<uint_fast32_t> atomic_uint_fast32_t; |
| 1166 |
|
| 1167 |
/// atomic_int_fast64_t |
| 1168 |
typedef atomic<int_fast64_t> atomic_int_fast64_t; |
| 1169 |
|
| 1170 |
/// atomic_uint_fast64_t |
| 1171 |
typedef atomic<uint_fast64_t> atomic_uint_fast64_t; |
| 1172 |
#endif |
| 1173 |
|
| 1174 |
|
| 1175 |
/// atomic_intptr_t |
| 1176 |
typedef atomic<intptr_t> atomic_intptr_t; |
| 1177 |
|
| 1178 |
/// atomic_uintptr_t |
| 1179 |
typedef atomic<uintptr_t> atomic_uintptr_t; |
| 1180 |
|
| 1181 |
/// atomic_size_t |
| 1182 |
typedef atomic<size_t> atomic_size_t; |
| 1183 |
|
| 1184 |
/// atomic_ptrdiff_t |
| 1185 |
typedef atomic<ptrdiff_t> atomic_ptrdiff_t; |
| 1186 |
|
| 1187 |
#ifdef _GLIBCXX_USE_C99_STDINT_TR1 |
| 1188 |
/// atomic_intmax_t |
| 1189 |
typedef atomic<intmax_t> atomic_intmax_t; |
| 1190 |
|
| 1191 |
/// atomic_uintmax_t |
| 1192 |
typedef atomic<uintmax_t> atomic_uintmax_t; |
| 1193 |
#endif |
| 1194 |
|
| 1195 |
// Function definitions, atomic_flag operations. |
| 1196 |
inline bool |
| 1197 |
atomic_flag_test_and_set_explicit(atomic_flag* __a, |
| 1198 |
memory_order __m) noexcept |
| 1199 |
{ return __a->test_and_set(__m); } |
| 1200 |
|
| 1201 |
inline bool |
| 1202 |
atomic_flag_test_and_set_explicit(volatile atomic_flag* __a, |
| 1203 |
memory_order __m) noexcept |
| 1204 |
{ return __a->test_and_set(__m); } |
| 1205 |
|
| 1206 |
inline void |
| 1207 |
atomic_flag_clear_explicit(atomic_flag* __a, memory_order __m) noexcept |
| 1208 |
{ __a->clear(__m); } |
| 1209 |
|
| 1210 |
inline void |
| 1211 |
atomic_flag_clear_explicit(volatile atomic_flag* __a, |
| 1212 |
memory_order __m) noexcept |
| 1213 |
{ __a->clear(__m); } |
| 1214 |
|
| 1215 |
inline bool |
| 1216 |
atomic_flag_test_and_set(atomic_flag* __a) noexcept |
| 1217 |
{ return atomic_flag_test_and_set_explicit(__a, memory_order_seq_cst); } |
| 1218 |
|
| 1219 |
inline bool |
| 1220 |
atomic_flag_test_and_set(volatile atomic_flag* __a) noexcept |
| 1221 |
{ return atomic_flag_test_and_set_explicit(__a, memory_order_seq_cst); } |
| 1222 |
|
| 1223 |
inline void |
| 1224 |
atomic_flag_clear(atomic_flag* __a) noexcept |
| 1225 |
{ atomic_flag_clear_explicit(__a, memory_order_seq_cst); } |
| 1226 |
|
| 1227 |
inline void |
| 1228 |
atomic_flag_clear(volatile atomic_flag* __a) noexcept |
| 1229 |
{ atomic_flag_clear_explicit(__a, memory_order_seq_cst); } |
| 1230 |
|
| 1231 |
|
| 1232 |
template<typename _Tp> |
| 1233 |
using __atomic_val_t = typename atomic<_Tp>::value_type; |
| 1234 |
template<typename _Tp> |
| 1235 |
using __atomic_diff_t = typename atomic<_Tp>::difference_type; |
| 1236 |
|
| 1237 |
// [atomics.nonmembers] Non-member functions. |
| 1238 |
// Function templates generally applicable to atomic types. |
| 1239 |
template<typename _ITp> |
| 1240 |
inline bool |
| 1241 |
atomic_is_lock_free(const atomic<_ITp>* __a) noexcept |
| 1242 |
{ return __a->is_lock_free(); } |
| 1243 |
|
| 1244 |
template<typename _ITp> |
| 1245 |
inline bool |
| 1246 |
atomic_is_lock_free(const volatile atomic<_ITp>* __a) noexcept |
| 1247 |
{ return __a->is_lock_free(); } |
| 1248 |
|
| 1249 |
template<typename _ITp> |
| 1250 |
inline void |
| 1251 |
atomic_init(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept |
| 1252 |
{ __a->store(__i, memory_order_relaxed); } |
| 1253 |
|
| 1254 |
template<typename _ITp> |
| 1255 |
inline void |
| 1256 |
atomic_init(volatile atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept |
| 1257 |
{ __a->store(__i, memory_order_relaxed); } |
| 1258 |
|
| 1259 |
template<typename _ITp> |
| 1260 |
inline void |
| 1261 |
atomic_store_explicit(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i, |
| 1262 |
memory_order __m) noexcept |
| 1263 |
{ __a->store(__i, __m); } |
| 1264 |
|
| 1265 |
template<typename _ITp> |
| 1266 |
inline void |
| 1267 |
atomic_store_explicit(volatile atomic<_ITp>* __a, __atomic_val_t<_ITp> __i, |
| 1268 |
memory_order __m) noexcept |
| 1269 |
{ __a->store(__i, __m); } |
| 1270 |
|
| 1271 |
template<typename _ITp> |
| 1272 |
inline _ITp |
| 1273 |
atomic_load_explicit(const atomic<_ITp>* __a, memory_order __m) noexcept |
| 1274 |
{ return __a->load(__m); } |
| 1275 |
|
| 1276 |
template<typename _ITp> |
| 1277 |
inline _ITp |
| 1278 |
atomic_load_explicit(const volatile atomic<_ITp>* __a, |
| 1279 |
memory_order __m) noexcept |
| 1280 |
{ return __a->load(__m); } |
| 1281 |
|
| 1282 |
template<typename _ITp> |
| 1283 |
inline _ITp |
| 1284 |
atomic_exchange_explicit(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i, |
| 1285 |
memory_order __m) noexcept |
| 1286 |
{ return __a->exchange(__i, __m); } |
| 1287 |
|
| 1288 |
template<typename _ITp> |
| 1289 |
inline _ITp |
| 1290 |
atomic_exchange_explicit(volatile atomic<_ITp>* __a, |
| 1291 |
__atomic_val_t<_ITp> __i, |
| 1292 |
memory_order __m) noexcept |
| 1293 |
{ return __a->exchange(__i, __m); } |
| 1294 |
|
| 1295 |
template<typename _ITp> |
| 1296 |
inline bool |
| 1297 |
atomic_compare_exchange_weak_explicit(atomic<_ITp>* __a, |
| 1298 |
__atomic_val_t<_ITp>* __i1, |
| 1299 |
__atomic_val_t<_ITp> __i2, |
| 1300 |
memory_order __m1, |
| 1301 |
memory_order __m2) noexcept |
| 1302 |
{ return __a->compare_exchange_weak(*__i1, __i2, __m1, __m2); } |
| 1303 |
|
| 1304 |
template<typename _ITp> |
| 1305 |
inline bool |
| 1306 |
atomic_compare_exchange_weak_explicit(volatile atomic<_ITp>* __a, |
| 1307 |
__atomic_val_t<_ITp>* __i1, |
| 1308 |
__atomic_val_t<_ITp> __i2, |
| 1309 |
memory_order __m1, |
| 1310 |
memory_order __m2) noexcept |
| 1311 |
{ return __a->compare_exchange_weak(*__i1, __i2, __m1, __m2); } |
| 1312 |
|
| 1313 |
template<typename _ITp> |
| 1314 |
inline bool |
| 1315 |
atomic_compare_exchange_strong_explicit(atomic<_ITp>* __a, |
| 1316 |
__atomic_val_t<_ITp>* __i1, |
| 1317 |
__atomic_val_t<_ITp> __i2, |
| 1318 |
memory_order __m1, |
| 1319 |
memory_order __m2) noexcept |
| 1320 |
{ return __a->compare_exchange_strong(*__i1, __i2, __m1, __m2); } |
| 1321 |
|
| 1322 |
template<typename _ITp> |
| 1323 |
inline bool |
| 1324 |
atomic_compare_exchange_strong_explicit(volatile atomic<_ITp>* __a, |
| 1325 |
__atomic_val_t<_ITp>* __i1, |
| 1326 |
__atomic_val_t<_ITp> __i2, |
| 1327 |
memory_order __m1, |
| 1328 |
memory_order __m2) noexcept |
| 1329 |
{ return __a->compare_exchange_strong(*__i1, __i2, __m1, __m2); } |
| 1330 |
|
| 1331 |
|
| 1332 |
template<typename _ITp> |
| 1333 |
inline void |
| 1334 |
atomic_store(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept |
| 1335 |
{ atomic_store_explicit(__a, __i, memory_order_seq_cst); } |
| 1336 |
|
| 1337 |
template<typename _ITp> |
| 1338 |
inline void |
| 1339 |
atomic_store(volatile atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept |
| 1340 |
{ atomic_store_explicit(__a, __i, memory_order_seq_cst); } |
| 1341 |
|
| 1342 |
template<typename _ITp> |
| 1343 |
inline _ITp |
| 1344 |
atomic_load(const atomic<_ITp>* __a) noexcept |
| 1345 |
{ return atomic_load_explicit(__a, memory_order_seq_cst); } |
| 1346 |
|
| 1347 |
template<typename _ITp> |
| 1348 |
inline _ITp |
| 1349 |
atomic_load(const volatile atomic<_ITp>* __a) noexcept |
| 1350 |
{ return atomic_load_explicit(__a, memory_order_seq_cst); } |
| 1351 |
|
| 1352 |
template<typename _ITp> |
| 1353 |
inline _ITp |
| 1354 |
atomic_exchange(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept |
| 1355 |
{ return atomic_exchange_explicit(__a, __i, memory_order_seq_cst); } |
| 1356 |
|
| 1357 |
template<typename _ITp> |
| 1358 |
inline _ITp |
| 1359 |
atomic_exchange(volatile atomic<_ITp>* __a, |
| 1360 |
__atomic_val_t<_ITp> __i) noexcept |
| 1361 |
{ return atomic_exchange_explicit(__a, __i, memory_order_seq_cst); } |
| 1362 |
|
| 1363 |
template<typename _ITp> |
| 1364 |
inline bool |
| 1365 |
atomic_compare_exchange_weak(atomic<_ITp>* __a, |
| 1366 |
__atomic_val_t<_ITp>* __i1, |
| 1367 |
__atomic_val_t<_ITp> __i2) noexcept |
| 1368 |
{ |
| 1369 |
return atomic_compare_exchange_weak_explicit(__a, __i1, __i2, |
| 1370 |
memory_order_seq_cst, |
| 1371 |
memory_order_seq_cst); |
| 1372 |
} |
| 1373 |
|
| 1374 |
template<typename _ITp> |
| 1375 |
inline bool |
| 1376 |
atomic_compare_exchange_weak(volatile atomic<_ITp>* __a, |
| 1377 |
__atomic_val_t<_ITp>* __i1, |
| 1378 |
__atomic_val_t<_ITp> __i2) noexcept |
| 1379 |
{ |
| 1380 |
return atomic_compare_exchange_weak_explicit(__a, __i1, __i2, |
| 1381 |
memory_order_seq_cst, |
| 1382 |
memory_order_seq_cst); |
| 1383 |
} |
| 1384 |
|
| 1385 |
template<typename _ITp> |
| 1386 |
inline bool |
| 1387 |
atomic_compare_exchange_strong(atomic<_ITp>* __a, |
| 1388 |
__atomic_val_t<_ITp>* __i1, |
| 1389 |
__atomic_val_t<_ITp> __i2) noexcept |
| 1390 |
{ |
| 1391 |
return atomic_compare_exchange_strong_explicit(__a, __i1, __i2, |
| 1392 |
memory_order_seq_cst, |
| 1393 |
memory_order_seq_cst); |
| 1394 |
} |
| 1395 |
|
| 1396 |
template<typename _ITp> |
| 1397 |
inline bool |
| 1398 |
atomic_compare_exchange_strong(volatile atomic<_ITp>* __a, |
| 1399 |
__atomic_val_t<_ITp>* __i1, |
| 1400 |
__atomic_val_t<_ITp> __i2) noexcept |
| 1401 |
{ |
| 1402 |
return atomic_compare_exchange_strong_explicit(__a, __i1, __i2, |
| 1403 |
memory_order_seq_cst, |
| 1404 |
memory_order_seq_cst); |
| 1405 |
} |
| 1406 |
|
| 1407 |
|
| 1408 |
#if __cpp_lib_atomic_wait |
| 1409 |
template<typename _Tp> |
| 1410 |
inline void |
| 1411 |
atomic_wait(const atomic<_Tp>* __a, |
| 1412 |
typename std::atomic<_Tp>::value_type __old) noexcept |
| 1413 |
{ __a->wait(__old); } |
| 1414 |
|
| 1415 |
template<typename _Tp> |
| 1416 |
inline void |
| 1417 |
atomic_wait_explicit(const atomic<_Tp>* __a, |
| 1418 |
typename std::atomic<_Tp>::value_type __old, |
| 1419 |
std::memory_order __m) noexcept |
| 1420 |
{ __a->wait(__old, __m); } |
| 1421 |
|
| 1422 |
template<typename _Tp> |
| 1423 |
inline void |
| 1424 |
atomic_notify_one(atomic<_Tp>* __a) noexcept |
| 1425 |
{ __a->notify_one(); } |
| 1426 |
|
| 1427 |
template<typename _Tp> |
| 1428 |
inline void |
| 1429 |
atomic_notify_all(atomic<_Tp>* __a) noexcept |
| 1430 |
{ __a->notify_all(); } |
| 1431 |
#endif // __cpp_lib_atomic_wait |
| 1432 |
|
| 1433 |
// Function templates for atomic_integral and atomic_pointer operations only. |
| 1434 |
// Some operations (and, or, xor) are only available for atomic integrals, |
| 1435 |
// which is implemented by taking a parameter of type __atomic_base<_ITp>*. |
| 1436 |
|
| 1437 |
template<typename _ITp> |
| 1438 |
inline _ITp |
| 1439 |
atomic_fetch_add_explicit(atomic<_ITp>* __a, |
| 1440 |
__atomic_diff_t<_ITp> __i, |
| 1441 |
memory_order __m) noexcept |
| 1442 |
{ return __a->fetch_add(__i, __m); } |
| 1443 |
|
| 1444 |
template<typename _ITp> |
| 1445 |
inline _ITp |
| 1446 |
atomic_fetch_add_explicit(volatile atomic<_ITp>* __a, |
| 1447 |
__atomic_diff_t<_ITp> __i, |
| 1448 |
memory_order __m) noexcept |
| 1449 |
{ return __a->fetch_add(__i, __m); } |
| 1450 |
|
| 1451 |
template<typename _ITp> |
| 1452 |
inline _ITp |
| 1453 |
atomic_fetch_sub_explicit(atomic<_ITp>* __a, |
| 1454 |
__atomic_diff_t<_ITp> __i, |
| 1455 |
memory_order __m) noexcept |
| 1456 |
{ return __a->fetch_sub(__i, __m); } |
| 1457 |
|
| 1458 |
template<typename _ITp> |
| 1459 |
inline _ITp |
| 1460 |
atomic_fetch_sub_explicit(volatile atomic<_ITp>* __a, |
| 1461 |
__atomic_diff_t<_ITp> __i, |
| 1462 |
memory_order __m) noexcept |
| 1463 |
{ return __a->fetch_sub(__i, __m); } |
| 1464 |
|
| 1465 |
template<typename _ITp> |
| 1466 |
inline _ITp |
| 1467 |
atomic_fetch_and_explicit(__atomic_base<_ITp>* __a, |
| 1468 |
__atomic_val_t<_ITp> __i, |
| 1469 |
memory_order __m) noexcept |
| 1470 |
{ return __a->fetch_and(__i, __m); } |
| 1471 |
|
| 1472 |
template<typename _ITp> |
| 1473 |
inline _ITp |
| 1474 |
atomic_fetch_and_explicit(volatile __atomic_base<_ITp>* __a, |
| 1475 |
__atomic_val_t<_ITp> __i, |
| 1476 |
memory_order __m) noexcept |
| 1477 |
{ return __a->fetch_and(__i, __m); } |
| 1478 |
|
| 1479 |
template<typename _ITp> |
| 1480 |
inline _ITp |
| 1481 |
atomic_fetch_or_explicit(__atomic_base<_ITp>* __a, |
| 1482 |
__atomic_val_t<_ITp> __i, |
| 1483 |
memory_order __m) noexcept |
| 1484 |
{ return __a->fetch_or(__i, __m); } |
| 1485 |
|
| 1486 |
template<typename _ITp> |
| 1487 |
inline _ITp |
| 1488 |
atomic_fetch_or_explicit(volatile __atomic_base<_ITp>* __a, |
| 1489 |
__atomic_val_t<_ITp> __i, |
| 1490 |
memory_order __m) noexcept |
| 1491 |
{ return __a->fetch_or(__i, __m); } |
| 1492 |
|
| 1493 |
template<typename _ITp> |
| 1494 |
inline _ITp |
| 1495 |
atomic_fetch_xor_explicit(__atomic_base<_ITp>* __a, |
| 1496 |
__atomic_val_t<_ITp> __i, |
| 1497 |
memory_order __m) noexcept |
| 1498 |
{ return __a->fetch_xor(__i, __m); } |
| 1499 |
|
| 1500 |
template<typename _ITp> |
| 1501 |
inline _ITp |
| 1502 |
atomic_fetch_xor_explicit(volatile __atomic_base<_ITp>* __a, |
| 1503 |
__atomic_val_t<_ITp> __i, |
| 1504 |
memory_order __m) noexcept |
| 1505 |
{ return __a->fetch_xor(__i, __m); } |
| 1506 |
|
| 1507 |
template<typename _ITp> |
| 1508 |
inline _ITp |
| 1509 |
atomic_fetch_add(atomic<_ITp>* __a, |
| 1510 |
__atomic_diff_t<_ITp> __i) noexcept |
| 1511 |
{ return atomic_fetch_add_explicit(__a, __i, memory_order_seq_cst); } |
| 1512 |
|
| 1513 |
template<typename _ITp> |
| 1514 |
inline _ITp |
| 1515 |
atomic_fetch_add(volatile atomic<_ITp>* __a, |
| 1516 |
__atomic_diff_t<_ITp> __i) noexcept |
| 1517 |
{ return atomic_fetch_add_explicit(__a, __i, memory_order_seq_cst); } |
| 1518 |
|
| 1519 |
template<typename _ITp> |
| 1520 |
inline _ITp |
| 1521 |
atomic_fetch_sub(atomic<_ITp>* __a, |
| 1522 |
__atomic_diff_t<_ITp> __i) noexcept |
| 1523 |
{ return atomic_fetch_sub_explicit(__a, __i, memory_order_seq_cst); } |
| 1524 |
|
| 1525 |
template<typename _ITp> |
| 1526 |
inline _ITp |
| 1527 |
atomic_fetch_sub(volatile atomic<_ITp>* __a, |
| 1528 |
__atomic_diff_t<_ITp> __i) noexcept |
| 1529 |
{ return atomic_fetch_sub_explicit(__a, __i, memory_order_seq_cst); } |
| 1530 |
|
| 1531 |
template<typename _ITp> |
| 1532 |
inline _ITp |
| 1533 |
atomic_fetch_and(__atomic_base<_ITp>* __a, |
| 1534 |
__atomic_val_t<_ITp> __i) noexcept |
| 1535 |
{ return atomic_fetch_and_explicit(__a, __i, memory_order_seq_cst); } |
| 1536 |
|
| 1537 |
template<typename _ITp> |
| 1538 |
inline _ITp |
| 1539 |
atomic_fetch_and(volatile __atomic_base<_ITp>* __a, |
| 1540 |
__atomic_val_t<_ITp> __i) noexcept |
| 1541 |
{ return atomic_fetch_and_explicit(__a, __i, memory_order_seq_cst); } |
| 1542 |
|
| 1543 |
template<typename _ITp> |
| 1544 |
inline _ITp |
| 1545 |
atomic_fetch_or(__atomic_base<_ITp>* __a, |
| 1546 |
__atomic_val_t<_ITp> __i) noexcept |
| 1547 |
{ return atomic_fetch_or_explicit(__a, __i, memory_order_seq_cst); } |
| 1548 |
|
| 1549 |
template<typename _ITp> |
| 1550 |
inline _ITp |
| 1551 |
atomic_fetch_or(volatile __atomic_base<_ITp>* __a, |
| 1552 |
__atomic_val_t<_ITp> __i) noexcept |
| 1553 |
{ return atomic_fetch_or_explicit(__a, __i, memory_order_seq_cst); } |
| 1554 |
|
| 1555 |
template<typename _ITp> |
| 1556 |
inline _ITp |
| 1557 |
atomic_fetch_xor(__atomic_base<_ITp>* __a, |
| 1558 |
__atomic_val_t<_ITp> __i) noexcept |
| 1559 |
{ return atomic_fetch_xor_explicit(__a, __i, memory_order_seq_cst); } |
| 1560 |
|
| 1561 |
template<typename _ITp> |
| 1562 |
inline _ITp |
| 1563 |
atomic_fetch_xor(volatile __atomic_base<_ITp>* __a, |
| 1564 |
__atomic_val_t<_ITp> __i) noexcept |
| 1565 |
{ return atomic_fetch_xor_explicit(__a, __i, memory_order_seq_cst); } |
| 1566 |
|
| 1567 |
#if __cplusplus > 201703L |
| 1568 |
#define __cpp_lib_atomic_float 201711L |
| 1569 |
template<> |
| 1570 |
struct atomic<float> : __atomic_float<float> |
| 1571 |
{ |
| 1572 |
atomic() noexcept = default; |
| 1573 |
|
| 1574 |
constexpr |
| 1575 |
atomic(float __fp) noexcept : __atomic_float<float>(__fp) |
| 1576 |
{ } |
| 1577 |
|
| 1578 |
atomic& operator=(const atomic&) volatile = delete; |
| 1579 |
atomic& operator=(const atomic&) = delete; |
| 1580 |
|
| 1581 |
using __atomic_float<float>::operator=; |
| 1582 |
}; |
| 1583 |
|
| 1584 |
template<> |
| 1585 |
struct atomic<double> : __atomic_float<double> |
| 1586 |
{ |
| 1587 |
atomic() noexcept = default; |
| 1588 |
|
| 1589 |
constexpr |
| 1590 |
atomic(double __fp) noexcept : __atomic_float<double>(__fp) |
| 1591 |
{ } |
| 1592 |
|
| 1593 |
atomic& operator=(const atomic&) volatile = delete; |
| 1594 |
atomic& operator=(const atomic&) = delete; |
| 1595 |
|
| 1596 |
using __atomic_float<double>::operator=; |
| 1597 |
}; |
| 1598 |
|
| 1599 |
template<> |
| 1600 |
struct atomic<long double> : __atomic_float<long double> |
| 1601 |
{ |
| 1602 |
atomic() noexcept = default; |
| 1603 |
|
| 1604 |
constexpr |
| 1605 |
atomic(long double __fp) noexcept : __atomic_float<long double>(__fp) |
| 1606 |
{ } |
| 1607 |
|
| 1608 |
atomic& operator=(const atomic&) volatile = delete; |
| 1609 |
atomic& operator=(const atomic&) = delete; |
| 1610 |
|
| 1611 |
using __atomic_float<long double>::operator=; |
| 1612 |
}; |
| 1613 |
|
| 1614 |
#define __cpp_lib_atomic_ref 201806L |
| 1615 |
|
| 1616 |
/// Class template to provide atomic operations on a non-atomic variable. |
| 1617 |
template<typename _Tp> |
| 1618 |
struct atomic_ref : __atomic_ref<_Tp> |
| 1619 |
{ |
| 1620 |
explicit |
| 1621 |
atomic_ref(_Tp& __t) noexcept : __atomic_ref<_Tp>(__t) |
| 1622 |
{ } |
| 1623 |
|
| 1624 |
atomic_ref& operator=(const atomic_ref&) = delete; |
| 1625 |
|
| 1626 |
atomic_ref(const atomic_ref&) = default; |
| 1627 |
|
| 1628 |
using __atomic_ref<_Tp>::operator=; |
| 1629 |
}; |
| 1630 |
|
| 1631 |
#endif // C++2a |
| 1632 |
|
| 1633 |
/// @} group atomics |
| 1634 |
|
| 1635 |
_GLIBCXX_END_NAMESPACE_VERSION |
| 1636 |
} // namespace |
| 1637 |
|
| 1638 |
#endif // C++11 |
| 1639 |
|
| 1640 |
#endif // _GLIBCXX_ATOMIC |
