turtle/turtle/detail/functor.hpp

// http://turtle.sourceforge.net
//
// Copyright Mathieu Champlon 2012
//
// 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)

#ifndef MOCK_FUNCTOR_HPP_INCLUDED
#define MOCK_FUNCTOR_HPP_INCLUDED

#include "../config.hpp"
#include "function.hpp"
#include "mutex.hpp"

namespace mock
{
namespace detail
{
    template< typename Signature >
    struct functor : function< Signature >
    {
        functor()
        {
            static mutex m_;
            scoped_lock _( m_ );
            static functor* f = 0;
            if( f )
            {
                *this = *f;
                f = 0;
                m_.unlock();
            }
            else
            {
                m_.lock();
                f = this;
            }
        }
    };
}
} // mock

#endif // MOCK_FUNCTOR_HPP_INCLUDED