Platform.h

/*
 * #%L
 * OME-XALAN C++ library for working with Xalan C++.
 * %%
 * Copyright © 2016 Open Microscopy Environment:
 *   - Massachusetts Institute of Technology
 *   - National Institutes of Health
 *   - University of Dundee
 *   - Board of Regents of the University of Wisconsin-Madison
 *   - Glencoe Software, Inc.
 * %%
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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 * #L%
 */

#ifndef OME_COMMON_XSL_PLATFORM_H
#define OME_COMMON_XSL_PLATFORM_H

#include <cstdint>

#include <mutex>

#include <ome/common/xml/Platform.h>

#include <xalanc/XalanTransformer/XalanTransformer.hpp>

namespace ome
{
  namespace common
  {
    namespace xsl
    {

      class Platform
      {
      public:
        Platform(bool skip = false):
          xmlplatform(),
          skip(skip)
        {
          std::lock_guard<std::mutex> lock(mutex);

          // Only call initialize for first instance.
          if (refcount == 0 && !skip)
            xalanc::XalanTransformer::initialize();
          ++refcount;
        }

        ~Platform()
        {
          std::lock_guard<std::mutex> lock(mutex);

          // Only call terminate for last instance.
          // refcount will never be zero at this point.
          if (refcount == 1 && !skip)
            xalanc::XalanTransformer::terminate();
          --refcount;
        }

      private:
        xml::Platform xmlplatform;
        bool skip;
        static std::mutex mutex;
        static uint32_t refcount;
      };

    }
  }
}

#endif // OME_COMMON_XSL_PLATFORM_H

/*
 * Local Variables:
 * mode:C++
 * End:
 */