/* | |
* Copyright (C) 2009, 2010 Google Inc. All rights reserved. | |
* | |
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* met: | |
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* notice, this list of conditions and the following disclaimer. | |
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* copyright notice, this list of conditions and the following disclaimer | |
* in the documentation and/or other materials provided with the | |
* distribution. | |
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* this software without specific prior written permission. | |
* | |
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
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*/ | |
#ifndef CrossThreadCopier_h | |
#define CrossThreadCopier_h | |
#include <wtf/PassOwnPtr.h> | |
#include <wtf/PassRefPtr.h> | |
#include <wtf/RefPtr.h> | |
#include <wtf/Threading.h> | |
#include <wtf/TypeTraits.h> | |
namespace WebCore { | |
class KURL; | |
class ResourceError; | |
class ResourceRequest; | |
class ResourceResponse; | |
class String; | |
struct CrossThreadResourceResponseData; | |
struct CrossThreadResourceRequestData; | |
struct ThreadableLoaderOptions; | |
template<typename T> struct CrossThreadCopierPassThrough { | |
typedef T Type; | |
static Type copy(const T& parameter) | |
{ | |
return parameter; | |
} | |
}; | |
template<bool isConvertibleToInteger, bool isThreadsafeShared, typename T> struct CrossThreadCopierBase; | |
// Integers get passed through without any changes. | |
template<typename T> struct CrossThreadCopierBase<true, false, T> : public CrossThreadCopierPassThrough<T> { | |
}; | |
// Pointers get passed through without any significant changes. | |
template<typename T> struct CrossThreadCopierBase<false, false, T*> : public CrossThreadCopierPassThrough<T*> { | |
}; | |
template<> struct CrossThreadCopierBase<false, false, ThreadableLoaderOptions> : public CrossThreadCopierPassThrough<ThreadableLoaderOptions> { | |
}; | |
// Custom copy methods. | |
template<typename T> struct CrossThreadCopierBase<false, true, T> { | |
typedef typename WTF::RemoveTemplate<T, RefPtr>::Type RefCountedType; | |
typedef PassRefPtr<RefCountedType> Type; | |
static Type copy(const T& refPtr) | |
{ | |
return refPtr.get(); | |
} | |
}; | |
template<typename T> struct CrossThreadCopierBase<false, false, PassOwnPtr<T> > { | |
typedef PassOwnPtr<T> Type; | |
static Type copy(const PassOwnPtr<T>& ownPtr) | |
{ | |
return PassOwnPtr<T>(static_cast<T*>(ownPtr.release())); | |
} | |
}; | |
template<> struct CrossThreadCopierBase<false, false, KURL> { | |
typedef KURL Type; | |
static Type copy(const KURL&); | |
}; | |
template<> struct CrossThreadCopierBase<false, false, String> { | |
typedef String Type; | |
static Type copy(const String&); | |
}; | |
template<> struct CrossThreadCopierBase<false, false, ResourceError> { | |
typedef ResourceError Type; | |
static Type copy(const ResourceError&); | |
}; | |
template<> struct CrossThreadCopierBase<false, false, ResourceRequest> { | |
typedef PassOwnPtr<CrossThreadResourceRequestData> Type; | |
static Type copy(const ResourceRequest&); | |
}; | |
template<> struct CrossThreadCopierBase<false, false, ResourceResponse> { | |
typedef PassOwnPtr<CrossThreadResourceResponseData> Type; | |
static Type copy(const ResourceResponse&); | |
}; | |
template<typename T> struct CrossThreadCopier : public CrossThreadCopierBase<WTF::IsConvertibleToInteger<T>::value, | |
WTF::IsSubclassOfTemplate<typename WTF::RemoveTemplate<T, RefPtr>::Type, ThreadSafeShared>::value, | |
T> { | |
}; | |
} // namespace WebCore | |
#endif // CrossThreadCopier_h |