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8484af2fa6
Differential Revision: https://phabricator.services.mozilla.com/D29302 --HG-- extra : moz-landing-system : lando
49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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/**
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* An implementation of Rooted for RefPtr<T>. This works by assuming that T has
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* a Trace() method defined on it which will trace whatever things inside the T
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* instance need tracing.
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*
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* This implementation has one serious drawback: operator= doesn't work right
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* because it's declared on Rooted directly and expects the type Rooted is
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* templated over.
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*/
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#ifndef mozilla_RootedRefPtr_h__
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#define mozilla_RootedRefPtr_h__
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#include "mozilla/RefPtr.h"
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#include "js/GCPolicyAPI.h"
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#include "js/RootingAPI.h"
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namespace JS {
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template <typename T>
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struct GCPolicy<RefPtr<T>> {
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static RefPtr<T> initial() { return RefPtr<T>(); }
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static void trace(JSTracer* trc, RefPtr<T>* tp, const char* name) {
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if (*tp) {
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(*tp)->Trace(trc);
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}
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}
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static bool isValid(const RefPtr<T>& v) {
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return !v || GCPolicy<T>::isValid(*v.get());
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}
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};
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} // namespace JS
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namespace js {
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template <typename T, typename Wrapper>
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struct WrappedPtrOperations<RefPtr<T>, Wrapper> {
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operator T*() const { return static_cast<const Wrapper*>(this)->get(); }
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};
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} // namespace js
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#endif /* mozilla_RootedRefPtr_h__ */
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