strawberry-audio-player-windows-mac-linux/src/engine/vlcscopedref.h

/*
 * Strawberry Music Player
 * This file was part of Clementine.
 * Copyright 2010, David Sansome <me@davidsansome.com>
 *
 * Strawberry is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Strawberry is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef VLCSCOPEDREF_H
#define VLCSCOPEDREF_H

#include "config.h"

#include <vlc/vlc.h>

template<typename T>
class VlcScopedRef {
 public:
  explicit VlcScopedRef(T *ptr);
  ~VlcScopedRef();

  operator T *() const { return ptr_; }
  operator bool() const { return ptr_; }
  T *operator->() const { return ptr_; }

 private:
  VlcScopedRef(VlcScopedRef&) {}
  VlcScopedRef &operator =(const VlcScopedRef&) { return *this; }

  T *ptr_;
};


#define VLCSCOPEDREF_DEFINE2(type, dtor) \
    template <> void VlcScopedRef_Release<libvlc_##type##_t>(libvlc_##type##_t *ptr) { \
      dtor(ptr); \
    }
#define VLCSCOPEDREF_DEFINE(type) VLCSCOPEDREF_DEFINE2(type, libvlc_##type##_release)

template<typename T>
void VlcScopedRef_Release(T *ptr);

VLCSCOPEDREF_DEFINE2(instance, libvlc_release)
VLCSCOPEDREF_DEFINE(media_player)
VLCSCOPEDREF_DEFINE(media)

template<> void VlcScopedRef_Release<char>(char *ptr) { free(ptr); }

template<typename T>
VlcScopedRef<T>::VlcScopedRef(T *ptr)
    : ptr_(ptr) {
}

template<typename T>
VlcScopedRef<T>::~VlcScopedRef() {
  VlcScopedRef_Release(ptr_);
}

#endif  // VLCSCOPEDREF_H