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/*
* 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. 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.
*/
#ifndef APIClient_h
#define APIClient_h
#include "APIClientTraits.h"
namespace WebKit {
template<typename ClientInterface, int currentVersion> class APIClient {
public:
APIClient()
{
initialize(0);
}
void initialize(const ClientInterface* client)
{
COMPILE_ASSERT(sizeof(APIClientTraits<ClientInterface>::interfaceSizesByVersion) / sizeof(size_t) == currentVersion + 1, size_of_some_interfaces_are_unknown);
if (client && client->version == currentVersion) {
m_client = *client;
return;
}
memset(&m_client, 0, sizeof(m_client));
if (client && client->version < currentVersion)
memcpy(&m_client, client, APIClientTraits<ClientInterface>::interfaceSizesByVersion[client->version]);
}
const ClientInterface& client() const { return m_client; }
protected:
ClientInterface m_client;
};
} // namespace WebKit
#endif // APIClient_h
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