gecko/js/public/WeakMapPtr.h

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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 */