From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- js/public/WeakMapPtr.h | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 js/public/WeakMapPtr.h (limited to 'js/public/WeakMapPtr.h') diff --git a/js/public/WeakMapPtr.h b/js/public/WeakMapPtr.h new file mode 100644 index 000000000..41860551a --- /dev/null +++ b/js/public/WeakMapPtr.h @@ -0,0 +1,46 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * vim: set ts=8 sts=4 et sw=4 tw=99: + * 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 http://mozilla.org/MPL/2.0/. */ + +#ifndef js_WeakMapPtr_h +#define js_WeakMapPtr_h + +#include "jspubtd.h" + +#include "js/TypeDecls.h" + +namespace JS { + +// A wrapper around the internal C++ representation of SpiderMonkey WeakMaps, +// usable outside the engine. +// +// The supported template specializations are enumerated in WeakMapPtr.cpp. If +// you want to use this class for a different key/value combination, add it to +// the list and the compiler will generate the relevant machinery. +template +class JS_PUBLIC_API(WeakMapPtr) +{ + public: + WeakMapPtr() : ptr(nullptr) {} + bool init(JSContext* cx); + bool initialized() { return ptr != nullptr; } + void destroy(); + virtual ~WeakMapPtr() { MOZ_ASSERT(!initialized()); } + void trace(JSTracer* tracer); + + V lookup(const K& key); + bool put(JSContext* cx, const K& key, const V& value); + + private: + void* ptr; + + // WeakMapPtr is neither copyable nor assignable. + WeakMapPtr(const WeakMapPtr& wmp) = delete; + WeakMapPtr& operator=(const WeakMapPtr& wmp) = delete; +}; + +} /* namespace JS */ + +#endif /* js_WeakMapPtr_h */ -- cgit v1.2.3