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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
#ifndef js_WasmModule_h
#define js_WasmModule_h
#include "mozilla/RefPtr.h" // RefPtr
#include "jstypes.h" // JS_PUBLIC_API
#include "js/RefCounted.h" // AtomicRefCounted
#include "js/TypeDecls.h" // HandleObject
namespace JS {
* The WasmModule interface allows the embedding to hold a reference to the
* underying C++ implementation of a JS WebAssembly.Module object for purposes
* of efficient postMessage() and (de)serialization from a random thread.
* In particular, this allows postMessage() of a WebAssembly.Module:
* GetWasmModule() is called when making a structured clone of a payload
* containing a WebAssembly.Module object. The structured clone buffer holds a
* refcount of the JS::WasmModule until createObject() is called in the target
* agent's JSContext. The new WebAssembly.Module object continues to hold the
* JS::WasmModule and thus the final reference of a JS::WasmModule may be
* dropped from any thread and so the virtual destructor (and all internal
* methods of the C++ module) must be thread-safe.
struct WasmModule : js::AtomicRefCounted<WasmModule> {
virtual ~WasmModule() = default;
virtual JSObject* createObject(JSContext* cx) const = 0;
virtual JSObject* createObjectForAsmJS(JSContext* cx) const = 0;
extern JS_PUBLIC_API bool IsWasmModuleObject(HandleObject obj);
extern JS_PUBLIC_API RefPtr<WasmModule> GetWasmModule(HandleObject obj);
} // namespace JS
#endif /* js_WasmModule_h */