WebKit/Source/JavaScriptCore/heap/HandleTypes.h at main · WebKit/WebKit · GitHub

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* 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.

#pragma once

#include <JavaScriptCore/JSCJSValue.h>

namespace JSC {

typedef JSValue* HandleSlot;

template<typename T> struct HandleTypes {

typedef T* ExternalType;

static ExternalType getFromSlot(HandleSlot slot) { return (slot && *slot) ? reinterpret_cast<ExternalType>(static_cast<void*>(slot->asCell())) : nullptr; }

static JSValue toJSValue(T* cell) { return reinterpret_cast<JSCell*>(cell); }

template<typename U> static void validateUpcast() { T* temp; temp = (U*)0; }

};

template<> struct HandleTypes<Unknown> {

typedef JSValue ExternalType;

static ExternalType getFromSlot(HandleSlot slot) { return slot ? *slot : JSValue(); }

static JSValue toJSValue(const JSValue& v) { return v; }

template<typename U> static void validateUpcast() { }

};

} // namespace JSC

WebKit/Source/JavaScriptCore/heap/HandleTypes.h at main · WebKit/WebKit · GitHub

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