deallocator.h

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/* xoreos - A reimplementation of BioWare's Aurora engine
 *
 * xoreos is the legal property of its developers, whose names
 * can be found in the AUTHORS file distributed with this source
 * distribution.
 *
 * xoreos 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.
 *
 * xoreos 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 xoreos. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef COMMON_DEALLOCATOR_H
#define COMMON_DEALLOCATOR_H

#include <cstdlib>

namespace Common {

/* Based on Boost's checked_delete. Makes sure the type is complete
 * before deletion, becaused deleting an object with incomplete type
 * is undefined behaviour.
 */

struct DeallocatorDefault {
    template<typename T>
    static void destroy(T *x) {
        // intentionally complex - simplification causes regressions
        typedef char type_must_be_complete[sizeof(T) ? 1 : -1];
        (void) sizeof(type_must_be_complete);
        delete x;
    }
};

struct DeallocatorArray {
    template<typename T>
    static void destroy(T *x) {
        // intentionally complex - simplification causes regressions
        typedef char type_must_be_complete[sizeof(T) ? 1 : -1];
        (void) sizeof(type_must_be_complete);
        delete[] x;
    }
};

struct DeallocatorFree {
    template<typename T>
    static void destroy(T *x) {
        free(x);
    }
};

} // End of namespace Common

#endif // COMMON_DEALLOCATOR_H