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 /* -*- 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 <typename K, typename V>

 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);

     static void keyMarkCallback(JSTracer *trc, K key, void *data);

   private:

     void *ptr;

     // WeakMapPtr is neither copyable nor assignable.

     WeakMapPtr(const WeakMapPtr &wmp) MOZ_DELETE;

     WeakMapPtr &operator=(const WeakMapPtr &wmp) MOZ_DELETE;

 };

 } /* namespace JS */

 #endif  /* js_WeakMapPtr_h */