+++ /dev/null
-/*
- * 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 wait_ops_windows.cpp
- *
- * This file contains implementation of the waiting/notifying atomic operations on Windows.
- *
- * https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-waitonaddress
- * https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-wakebyaddresssingle
- * https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-wakebyaddressall
- */
-
-// Include boost/winapi/config.hpp first to make sure target Windows version is selected by Boost.WinAPI
-#include <boost/winapi/config.hpp>
-
-#include <boost/winapi/basic_types.hpp>
-#include <boost/winapi/wait_on_address.hpp>
-
-#include <boost/atomic/detail/config.hpp>
-#include <boost/atomic/detail/link.hpp>
-#include <boost/atomic/detail/once_flag.hpp>
-#include <boost/atomic/detail/wait_ops_windows.hpp>
-
-#if BOOST_USE_WINAPI_VERSION < BOOST_WINAPI_VERSION_WIN8
-#include <boost/static_assert.hpp>
-#include <boost/memory_order.hpp>
-#include <boost/winapi/thread.hpp>
-#include <boost/winapi/get_proc_address.hpp>
-#include <boost/winapi/dll.hpp>
-
-#include <boost/atomic/detail/core_operations.hpp>
-#endif // BOOST_USE_WINAPI_VERSION < BOOST_WINAPI_VERSION_WIN8
-
-#include <boost/atomic/detail/header.hpp>
-
-namespace boost {
-namespace atomics {
-namespace detail {
-
-#if BOOST_USE_WINAPI_VERSION < BOOST_WINAPI_VERSION_WIN8
-
-BOOST_ATOMIC_DECL wait_on_address_t* wait_on_address = NULL;
-BOOST_ATOMIC_DECL wake_by_address_t* wake_by_address_single = NULL;
-BOOST_ATOMIC_DECL wake_by_address_t* wake_by_address_all = NULL;
-
-BOOST_ATOMIC_DECL once_flag wait_functions_once_flag = { 2u };
-
-BOOST_ATOMIC_DECL void initialize_wait_functions() BOOST_NOEXCEPT
-{
- BOOST_STATIC_ASSERT_MSG(once_flag_operations::is_always_lock_free, "Boost.Atomic unsupported target platform: native atomic operations not implemented for bytes");
-
- once_flag_operations::storage_type old_val = once_flag_operations::load(wait_functions_once_flag.m_flag, boost::memory_order_acquire);
- while (true)
- {
- if (old_val == 2u)
- {
- if (BOOST_UNLIKELY(!once_flag_operations::compare_exchange_strong(wait_functions_once_flag.m_flag, old_val, 1u, boost::memory_order_relaxed, boost::memory_order_relaxed)))
- continue;
-
- boost::winapi::HMODULE_ kernel_base = boost::winapi::get_module_handle(L"api-ms-win-core-synch-l1-2-0.dll");
- if (BOOST_LIKELY(kernel_base != NULL))
- {
- wait_on_address_t* woa = (wait_on_address_t*)boost::winapi::get_proc_address(kernel_base, "WaitOnAddress");
- if (BOOST_LIKELY(woa != NULL))
- {
- wake_by_address_t* wbas = (wake_by_address_t*)boost::winapi::get_proc_address(kernel_base, "WakeByAddressSingle");
- wake_by_address_t* wbaa = (wake_by_address_t*)boost::winapi::get_proc_address(kernel_base, "WakeByAddressAll");
-
- if (BOOST_LIKELY(wbas != NULL && wbaa != NULL))
- {
- wait_on_address = woa;
- wake_by_address_single = wbas;
- wake_by_address_all = wbaa;
- }
- }
- }
-
- once_flag_operations::store(wait_functions_once_flag.m_flag, 0u, boost::memory_order_release);
- break;
- }
- else if (old_val == 1u)
- {
- boost::winapi::SwitchToThread();
- old_val = once_flag_operations::load(wait_functions_once_flag.m_flag, boost::memory_order_acquire);
- }
- else
- {
- break;
- }
- }
-}
-
-#else // BOOST_USE_WINAPI_VERSION < BOOST_WINAPI_VERSION_WIN8
-
-BOOST_ATOMIC_DECL wait_on_address_t* wait_on_address = &boost::winapi::WaitOnAddress;
-BOOST_ATOMIC_DECL wake_by_address_t* wake_by_address_single = &boost::winapi::WakeByAddressSingle;
-BOOST_ATOMIC_DECL wake_by_address_t* wake_by_address_all = &boost::winapi::WakeByAddressAll;
-
-BOOST_ATOMIC_DECL once_flag wait_functions_once_flag = { 0u };
-
-BOOST_ATOMIC_DECL void initialize_wait_functions() BOOST_NOEXCEPT
-{
-}
-
-#endif // BOOST_USE_WINAPI_VERSION < BOOST_WINAPI_VERSION_WIN8
-
-} // namespace detail
-} // namespace atomics
-} // namespace boost
-
-#include <boost/atomic/detail/footer.hpp>