Source/WebKit2/Shared/Cocoa/WKObject.h

/*
 * Copyright (C) 2013 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. AND ITS 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 APPLE INC. OR ITS 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.
 */

#import "WKFoundation.h"

#if WK_API_ENABLED

#import <type_traits>

namespace API {
class Object;

template<typename T>
struct ObjectStorage {
    T* get() { return reinterpret_cast<T*>(&data); }
    T& operator*() { return *reinterpret_cast<T*>(&data); }
    T* operator->() { return reinterpret_cast<T*>(&data); }

    typename std::aligned_storage<sizeof(T), std::alignment_of<T>::value>::type data;
};

API::Object* unwrap(void*);
void* wrap(API::Object*);

}

@protocol WKObject <NSObject>

@property (readonly) API::Object& _apiObject;

@end

NS_ROOT_CLASS
@interface WKObject <WKObject>

- (NSObject *)_web_createTarget NS_RETURNS_RETAINED;

@end

#endif // WK_API_ENABLED