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