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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* 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 "jstypes.h"
#include "js/TypeDecls.h"
class JS_PUBLIC_API JSTracer;
namespace JS {
// A wrapper around the internal C++ representation of SpiderMonkey WeakMaps,
// usable outside the engine.
//
// The supported template specializations are enumerated in gc/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* trc);
V lookup(const K& key);
bool put(JSContext* cx, const K& key, const V& value);
V removeValue(const K& key);
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 */
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