| #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_POOL_HPP_INCLUDED |
| #define BOOST_SMART_PTR_DETAIL_SPINLOCK_POOL_HPP_INCLUDED |
| |
| // MS compatible compilers support #pragma once |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1020) |
| # pragma once |
| #endif |
| |
| // |
| // boost/detail/spinlock_pool.hpp |
| // |
| // Copyright (c) 2008 Peter Dimov |
| // |
| // 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) |
| // |
| // spinlock_pool<0> is reserved for atomic<>, when/if it arrives |
| // spinlock_pool<1> is reserved for shared_ptr reference counts |
| // spinlock_pool<2> is reserved for shared_ptr atomic access |
| // |
| |
| #include <boost/config.hpp> |
| #include <boost/smart_ptr/detail/spinlock.hpp> |
| #include <cstddef> |
| |
| namespace boost |
| { |
| |
| namespace detail |
| { |
| |
| template< int I > class spinlock_pool |
| { |
| private: |
| |
| static spinlock pool_[ 41 ]; |
| |
| public: |
| |
| static spinlock & spinlock_for( void const * pv ) |
| { |
| #if defined(__VMS) && __INITIAL_POINTER_SIZE == 64 |
| std::size_t i = reinterpret_cast< unsigned long long >( pv ) % 41; |
| #else |
| std::size_t i = reinterpret_cast< std::size_t >( pv ) % 41; |
| #endif |
| return pool_[ i ]; |
| } |
| |
| class scoped_lock |
| { |
| private: |
| |
| spinlock & sp_; |
| |
| scoped_lock( scoped_lock const & ); |
| scoped_lock & operator=( scoped_lock const & ); |
| |
| public: |
| |
| explicit scoped_lock( void const * pv ): sp_( spinlock_for( pv ) ) |
| { |
| sp_.lock(); |
| } |
| |
| ~scoped_lock() |
| { |
| sp_.unlock(); |
| } |
| }; |
| }; |
| |
| template< int I > spinlock spinlock_pool< I >::pool_[ 41 ] = |
| { |
| BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, |
| BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, |
| BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, |
| BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, |
| BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, |
| BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, |
| BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, |
| BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, |
| BOOST_DETAIL_SPINLOCK_INIT |
| }; |
| |
| } // namespace detail |
| } // namespace boost |
| |
| #endif // #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_POOL_HPP_INCLUDED |