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- #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_NT_HPP_INCLUDED
- #define BOOST_SMART_PTR_DETAIL_SPINLOCK_NT_HPP_INCLUDED
- // MS compatible compilers support #pragma once
- #if defined(_MSC_VER) && (_MSC_VER >= 1020)
- # pragma once
- #endif
- //
- // 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)
- //
- #include <boost/assert.hpp>
- namespace boost
- {
- namespace detail
- {
- class spinlock
- {
- public:
- bool locked_;
- public:
- inline bool try_lock()
- {
- if( locked_ )
- {
- return false;
- }
- else
- {
- locked_ = true;
- return true;
- }
- }
- inline void lock()
- {
- BOOST_ASSERT( !locked_ );
- locked_ = true;
- }
- inline void unlock()
- {
- BOOST_ASSERT( locked_ );
- locked_ = false;
- }
- public:
- class scoped_lock
- {
- private:
- spinlock & sp_;
- scoped_lock( scoped_lock const & );
- scoped_lock & operator=( scoped_lock const & );
- public:
- explicit scoped_lock( spinlock & sp ): sp_( sp )
- {
- sp.lock();
- }
- ~scoped_lock()
- {
- sp_.unlock();
- }
- };
- };
- } // namespace detail
- } // namespace boost
- #define BOOST_DETAIL_SPINLOCK_INIT { false }
- #endif // #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_NT_HPP_INCLUDED
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