// Copyright (C) 2000 Stephen Cleary

 //

 // 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)

 //

 // See http://www.boost.org for updates, documentation, and revision history.

 #ifndef BOOST_POOL_GUARD_HPP

 #define BOOST_POOL_GUARD_HPP

 // Extremely Light-Weight guard glass

 namespace boost {

 namespace details {

 namespace pool {

 template <typename Mutex>

 class guard

 {

   private:

     Mutex & mtx;

     guard(const guard &);

     void operator=(const guard &);

   public:

     explicit guard(Mutex & nmtx)

     :mtx(nmtx) { mtx.lock(); }

     ~guard() { mtx.unlock(); }

 };

 } // namespace pool

 } // namespace details

 } // namespace boost

 #endif