include/OffscreenGecko/baseobj.h

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/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is OffscreenGecko code.
 *
 * The Initial Developer of the Original Code is
 * Frank Richter <frank.richter@gmail.com>.
 * Portions created by the Initial Developer are Copyright (C) 2007
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef __OFFSCREENGECKO_BASEOBJ_H__
#define __OFFSCREENGECKO_BASEOBJ_H__

#include "defs.h"

typedef struct OSGK_BaseObject_s
{
#ifdef OSGK_BUILD
  int refCount;
#else
# ifndef __cplusplus
  int reserved;
# endif
#endif
}
OSGK_BaseObject;
#define OSGK_DERIVEDTYPE(T)           \
  typedef struct T ## _s {            \
    OSGK_BaseObject baseobj;          \
  } T

OSGK_EXTERN_C OSGK_API int osgk_addref (OSGK_BaseObject* obj);

OSGK_EXTERN_C OSGK_API int osgk_release (OSGK_BaseObject* obj);

#ifndef OSGK___DOXYRUN__
static OSGK_INLINE int osgk_addref_real (OSGK_BaseObject* obj)
{
  return osgk_addref (obj);
}

static OSGK_INLINE int osgk_release_real (OSGK_BaseObject* obj)
{
  return osgk_release (obj);
}

#define osgk_addref(obj)    osgk_addref_real (&((obj)->baseobj))
#define osgk_release(obj)   osgk_release_real (&((obj)->baseobj))
#endif // OSGK___DOXYRUN__

#ifdef __cplusplus
namespace OSGK
{
  namespace CXXAPI
  {
    template<typename T>
    class Wrap
    {
    public:
      typedef T WrappedType;
      typedef Wrap WrapperType;
    protected:
      T* obj;
    public:
      static WrappedType* Null() { return 0; }
    
      explicit Wrap (T* obj) : obj (obj) {}
      Wrap (const Wrap& other) : obj (other.obj)
      {
        if (obj != 0) osgk_addref (obj);
      }
      ~Wrap()
      {
        if (obj != 0) osgk_release (obj);
      }
      Wrap& operator=(const Wrap& other)
      {
        if (other.obj != 0) osgk_addref (other.obj);
        if (obj != 0) osgk_release (obj);
        obj = other.obj;
        return *this;
      }
      
      bool IsValid() const { return obj != 0; }
      void Invalidate() { *this = Wrap (Null()); }
      
      void SetObject (T* obj) { this->obj = obj; }
      T* GetObject() const { return obj; }
      T* Detach()
      {
        T* ret = obj;
        obj = 0;
        return ret;
      }
    };
  } // namespace CXXAPI
} // namespace OSGK
#endif
  
  
#endif // __OFFSCREENGECKO_BASEOBJ_H__

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