SchwarzCounter.hpp

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/*CXXR $Id: SchwarzCounter.hpp 1351 2013-03-08 15:12:28Z arr $
 *CXXR
 *CXXR This file is part of CXXR, a project to refactor the R interpreter
 *CXXR into C++.  It may consist in whole or in part of program code and
 *CXXR documentation taken from the R project itself, incorporated into
 *CXXR CXXR (and possibly MODIFIED) under the terms of the GNU General Public
 *CXXR Licence.
 *CXXR 
 *CXXR CXXR is Copyright (C) 2008-13 Andrew R. Runnalls, subject to such other
 *CXXR copyrights and copyright restrictions as may be stated below.
 *CXXR 
 *CXXR CXXR is not part of the R project, and bugs and other issues should
 *CXXR not be reported via r-bugs or other R project channels; instead refer
 *CXXR to the CXXR website.
 *CXXR */

#ifndef SCHWARZCOUNTER_HPP
#define SCHWARZCOUNTER_HPP

namespace CXXR {
    template <class T> class SchwarzCounter {
    public:
        SchwarzCounter()
        {
            if (!s_count++) T::initialize();
        }

        ~SchwarzCounter()
        {
            if (!--s_count) T::cleanup();
        }
    private:
        static unsigned int s_count;
    };

    template <class T> unsigned int SchwarzCounter<T>::s_count = 0;
}

#endif // SCHWARZCOUNTER_HPP