Added thirdparty: boost library

2026-08-18 13:18:12 +00:00 · 2024-01-06 19:55:56 +02:00
parent bf49f439e1
commit bccd1e7051
15683 changed files with 3239840 additions and 0 deletions
@@ -0,0 +1,111 @@
+/*
+ * 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) 2020 Andrey Semashev
+ */
+/*!
+ * \file   atomic/detail/wait_ops_futex.hpp
+ *
+ * This header contains implementation of the waiting/notifying atomic operations based on futexes.
+ */
+
+#ifndef BOOST_ATOMIC_DETAIL_WAIT_OPS_FUTEX_HPP_INCLUDED_
+#define BOOST_ATOMIC_DETAIL_WAIT_OPS_FUTEX_HPP_INCLUDED_
+
+#include <boost/memory_order.hpp>
+#include <boost/atomic/detail/config.hpp>
+#include <boost/atomic/detail/futex.hpp>
+#include <boost/atomic/detail/wait_operations_fwd.hpp>
+#include <boost/atomic/detail/header.hpp>
+
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#pragma once
+#endif
+
+namespace boost {
+namespace atomics {
+namespace detail {
+
+template< typename Base >
+struct wait_operations< Base, 4u, true, false > :
+    public Base
+{
+    typedef Base base_type;
+    typedef typename base_type::storage_type storage_type;
+
+    static BOOST_CONSTEXPR_OR_CONST bool always_has_native_wait_notify = true;
+
+    static BOOST_FORCEINLINE bool has_native_wait_notify(storage_type const volatile&) BOOST_NOEXCEPT
+    {
+        return true;
+    }
+
+    static BOOST_FORCEINLINE storage_type wait(storage_type const volatile& storage, storage_type old_val, memory_order order) BOOST_NOEXCEPT
+    {
+        storage_type new_val = base_type::load(storage, order);
+        while (new_val == old_val)
+        {
+            atomics::detail::futex_wait_private(const_cast< storage_type* >(&storage), old_val);
+            new_val = base_type::load(storage, order);
+        }
+
+        return new_val;
+    }
+
+    static BOOST_FORCEINLINE void notify_one(storage_type volatile& storage) BOOST_NOEXCEPT
+    {
+        atomics::detail::futex_signal_private(const_cast< storage_type* >(&storage));
+    }
+
+    static BOOST_FORCEINLINE void notify_all(storage_type volatile& storage) BOOST_NOEXCEPT
+    {
+        atomics::detail::futex_broadcast_private(const_cast< storage_type* >(&storage));
+    }
+};
+
+template< typename Base >
+struct wait_operations< Base, 4u, true, true > :
+    public Base
+{
+    typedef Base base_type;
+    typedef typename base_type::storage_type storage_type;
+
+    static BOOST_CONSTEXPR_OR_CONST bool always_has_native_wait_notify = true;
+
+    static BOOST_FORCEINLINE bool has_native_wait_notify(storage_type const volatile&) BOOST_NOEXCEPT
+    {
+        return true;
+    }
+
+    static BOOST_FORCEINLINE storage_type wait(storage_type const volatile& storage, storage_type old_val, memory_order order) BOOST_NOEXCEPT
+    {
+        storage_type new_val = base_type::load(storage, order);
+        while (new_val == old_val)
+        {
+            atomics::detail::futex_wait(const_cast< storage_type* >(&storage), old_val);
+            new_val = base_type::load(storage, order);
+        }
+
+        return new_val;
+    }
+
+    static BOOST_FORCEINLINE void notify_one(storage_type volatile& storage) BOOST_NOEXCEPT
+    {
+        atomics::detail::futex_signal(const_cast< storage_type* >(&storage));
+    }
+
+    static BOOST_FORCEINLINE void notify_all(storage_type volatile& storage) BOOST_NOEXCEPT
+    {
+        atomics::detail::futex_broadcast(const_cast< storage_type* >(&storage));
+    }
+};
+
+} // namespace detail
+} // namespace atomics
+} // namespace boost
+
+#include <boost/atomic/detail/footer.hpp>
+
+#endif // BOOST_ATOMIC_DETAIL_WAIT_OPS_FUTEX_HPP_INCLUDED_