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/*
* Copyright (C) 2016-2017 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.
*/
#pragma once
#if ENABLE(WEBASSEMBLY)
#include "JSDestructibleObject.h"
#include "JSObject.h"
#include "WasmMemory.h"
#include <wtf/RefPtr.h>
namespace JSC {
class ArrayBuffer;
class JSArrayBuffer;
class JSWebAssemblyMemory : public JSDestructibleObject {
public:
typedef JSDestructibleObject Base;
template<typename CellType>
static Subspace* subspaceFor(VM& vm)
{
// We hold onto a lot of memory, so it makes a lot of sense to be swept eagerly.
return &vm.eagerlySweptDestructibleObjectSpace;
}
static JSWebAssemblyMemory* create(ExecState*, VM&, Structure*, Ref<Wasm::Memory>&&);
static Structure* createStructure(VM&, JSGlobalObject*, JSValue);
DECLARE_EXPORT_INFO;
Wasm::Memory& memory() { return m_memory.get(); }
JSArrayBuffer* buffer(VM& vm, JSGlobalObject*);
Wasm::PageCount grow(VM&, ExecState*, uint32_t delta, bool shouldThrowExceptionsOnFailure);
static ptrdiff_t offsetOfMemory() { return OBJECT_OFFSETOF(JSWebAssemblyMemory, m_memoryBase); }
static ptrdiff_t offsetOfSize() { return OBJECT_OFFSETOF(JSWebAssemblyMemory, m_memorySize); }
private:
JSWebAssemblyMemory(VM&, Structure*, Ref<Wasm::Memory>&&);
void finishCreation(VM&);
static void destroy(JSCell*);
static void visitChildren(JSCell*, SlotVisitor&);
void* m_memoryBase;
size_t m_memorySize;
Ref<Wasm::Memory> m_memory;
WriteBarrier<JSArrayBuffer> m_bufferWrapper;
RefPtr<ArrayBuffer> m_buffer;
};
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY)
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