/*
 * Copyright (C) 2010 Apple Inc. All rights reserved.
 *
 * 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 APPLE INC. ``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 APPLE INC. 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 CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#ifndef ValueCheck_h
#define ValueCheck_h

// For malloc_size and _msize.
#if OS(DARWIN)
#include <malloc/malloc.h>
#elif COMPILER(MSVC)
#include <malloc.h>
#endif

namespace WTF {

template<typename T> struct ValueCheck {
    typedef T TraitType;
    static void checkConsistency(const T&) { }
};

#if !ASSERT_DISABLED
template<typename P> struct ValueCheck<P*> {
    typedef P* TraitType;
    static void checkConsistency(const P* p)
    {
        if (!p)
            return;
#if (defined(USE_SYSTEM_MALLOC) && USE_SYSTEM_MALLOC) || !defined(NDEBUG)
#if OS(DARWIN)
        ASSERT(malloc_size(p));
#elif COMPILER(MSVC)
        ASSERT(_msize(const_cast<P*>(p)));
#endif
#endif
        ValueCheck<P>::checkConsistency(*p);
    }
};
#endif

}

#endif // ValueCheck_h