michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0:  * vim: set ts=8 sts=4 et sw=4 tw=99:
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef js_WeakMapPtr_h
michael@0: #define js_WeakMapPtr_h
michael@0: 
michael@0: #include "jspubtd.h"
michael@0: 
michael@0: #include "js/TypeDecls.h"
michael@0: 
michael@0: namespace JS {
michael@0: 
michael@0: // A wrapper around the internal C++ representation of SpiderMonkey WeakMaps,
michael@0: // usable outside the engine.
michael@0: //
michael@0: // The supported template specializations are enumerated in WeakMapPtr.cpp. If
michael@0: // you want to use this class for a different key/value combination, add it to
michael@0: // the list and the compiler will generate the relevant machinery.
michael@0: template <typename K, typename V>
michael@0: class JS_PUBLIC_API(WeakMapPtr)
michael@0: {
michael@0:   public:
michael@0:     WeakMapPtr() : ptr(nullptr) {};
michael@0:     bool init(JSContext *cx);
michael@0:     bool initialized() { return ptr != nullptr; };
michael@0:     void destroy();
michael@0:     virtual ~WeakMapPtr() { MOZ_ASSERT(!initialized()); }
michael@0:     void trace(JSTracer *tracer);
michael@0: 
michael@0:     V lookup(const K &key);
michael@0:     bool put(JSContext *cx, const K &key, const V &value);
michael@0: 
michael@0:     static void keyMarkCallback(JSTracer *trc, K key, void *data);
michael@0: 
michael@0:   private:
michael@0:     void *ptr;
michael@0: 
michael@0:     // WeakMapPtr is neither copyable nor assignable.
michael@0:     WeakMapPtr(const WeakMapPtr &wmp) MOZ_DELETE;
michael@0:     WeakMapPtr &operator=(const WeakMapPtr &wmp) MOZ_DELETE;
michael@0: };
michael@0: 
michael@0: } /* namespace JS */
michael@0: 
michael@0: #endif  /* js_WeakMapPtr_h */