Added thirdparty: boost library

thirdparty/include/boost/atomic/detail/atomic_flag_impl.hpp

@@ -0,0 +1,129 @@
+/*
+ * Distributed under the Boost Software License, Version 1.0.
+ * (See accompanying file LICENSE_1_0.txt or copy at
+ * http://www.boost.org/LICENSE_1_0.txt)
+ *
+ * Copyright (c) 2011 Helge Bahmann
+ * Copyright (c) 2013 Tim Blechmann
+ * Copyright (c) 2014, 2020 Andrey Semashev
+ */
+/*!
+ * \file   atomic/detail/atomic_flag_impl.hpp
+ *
+ * This header contains implementation of \c atomic_flag.
+ */
+
+#ifndef BOOST_ATOMIC_DETAIL_ATOMIC_FLAG_IMPL_HPP_INCLUDED_
+#define BOOST_ATOMIC_DETAIL_ATOMIC_FLAG_IMPL_HPP_INCLUDED_
+
+#include <boost/assert.hpp>
+#include <boost/memory_order.hpp>
+#include <boost/atomic/detail/config.hpp>
+#include <boost/atomic/detail/core_operations.hpp>
+#include <boost/atomic/detail/wait_operations.hpp>
+#include <boost/atomic/detail/aligned_variable.hpp>
+#include <boost/atomic/detail/header.hpp>
+
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#pragma once
+#endif
+
+/*
+ * IMPLEMENTATION NOTE: All interface functions MUST be declared with BOOST_FORCEINLINE,
+ *                      see comment for convert_memory_order_to_gcc in gcc_atomic_memory_order_utils.hpp.
+ */
+
+namespace boost {
+namespace atomics {
+namespace detail {
+
+#if defined(BOOST_ATOMIC_DETAIL_NO_CXX11_CONSTEXPR_UNION_INIT) || defined(BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX)
+#define BOOST_ATOMIC_NO_ATOMIC_FLAG_INIT
+#else
+#define BOOST_ATOMIC_FLAG_INIT {}
+#endif
+
+//! Atomic flag implementation
+template< bool IsInterprocess >
+struct atomic_flag_impl
+{
+    // Prefer 4-byte storage as most platforms support waiting/notifying operations without a lock pool for 32-bit integers
+    typedef atomics::detail::core_operations< 4u, false, IsInterprocess > core_operations;
+    typedef atomics::detail::wait_operations< core_operations > wait_operations;
+    typedef typename core_operations::storage_type storage_type;
+
+    static BOOST_CONSTEXPR_OR_CONST bool is_always_lock_free = core_operations::is_always_lock_free;
+    static BOOST_CONSTEXPR_OR_CONST bool always_has_native_wait_notify = wait_operations::always_has_native_wait_notify;
+
+    BOOST_ATOMIC_DETAIL_ALIGNED_VAR_TPL(core_operations::storage_alignment, storage_type, m_storage);
+
+    BOOST_FORCEINLINE BOOST_ATOMIC_DETAIL_CONSTEXPR_UNION_INIT atomic_flag_impl() BOOST_NOEXCEPT : m_storage(0u)
+    {
+    }
+
+    BOOST_FORCEINLINE bool is_lock_free() const volatile BOOST_NOEXCEPT
+    {
+        return is_always_lock_free;
+    }
+
+    BOOST_FORCEINLINE bool has_native_wait_notify() const volatile BOOST_NOEXCEPT
+    {
+        return wait_operations::has_native_wait_notify(m_storage);
+    }
+
+    BOOST_FORCEINLINE bool test(memory_order order = memory_order_seq_cst) const volatile BOOST_NOEXCEPT
+    {
+        BOOST_ASSERT(order != memory_order_release);
+        BOOST_ASSERT(order != memory_order_acq_rel);
+        return !!core_operations::load(m_storage, order);
+    }
+
+    BOOST_FORCEINLINE bool test_and_set(memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT
+    {
+        return core_operations::test_and_set(m_storage, order);
+    }
+
+    BOOST_FORCEINLINE void clear(memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT
+    {
+        BOOST_ASSERT(order != memory_order_consume);
+        BOOST_ASSERT(order != memory_order_acquire);
+        BOOST_ASSERT(order != memory_order_acq_rel);
+        core_operations::clear(m_storage, order);
+    }
+
+    BOOST_FORCEINLINE bool wait(bool old_val, memory_order order = memory_order_seq_cst) const volatile BOOST_NOEXCEPT
+    {
+        BOOST_ASSERT(order != memory_order_release);
+        BOOST_ASSERT(order != memory_order_acq_rel);
+
+        return !!wait_operations::wait(m_storage, static_cast< storage_type >(old_val), order);
+    }
+
+    BOOST_FORCEINLINE void notify_one() volatile BOOST_NOEXCEPT
+    {
+        wait_operations::notify_one(m_storage);
+    }
+
+    BOOST_FORCEINLINE void notify_all() volatile BOOST_NOEXCEPT
+    {
+        wait_operations::notify_all(m_storage);
+    }
+
+    BOOST_DELETED_FUNCTION(atomic_flag_impl(atomic_flag_impl const&))
+    BOOST_DELETED_FUNCTION(atomic_flag_impl& operator= (atomic_flag_impl const&))
+};
+
+#if defined(BOOST_NO_CXX17_INLINE_VARIABLES)
+template< bool IsInterprocess >
+BOOST_CONSTEXPR_OR_CONST bool atomic_flag_impl< IsInterprocess >::is_always_lock_free;
+template< bool IsInterprocess >
+BOOST_CONSTEXPR_OR_CONST bool atomic_flag_impl< IsInterprocess >::always_has_native_wait_notify;
+#endif
+
+} // namespace detail
+} // namespace atomics
+} // namespace boost
+
+#include <boost/atomic/detail/footer.hpp>
+
+#endif // BOOST_ATOMIC_DETAIL_ATOMIC_FLAG_IMPL_HPP_INCLUDED_