mirror of https://gitee.com/openkylin/firefox.git
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 -*- */
|
|
/* 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/. */
|
|
|
|
/**
|
|
* An implementation of Rooted for RefPtr<T>. This works by assuming that T has
|
|
* a Trace() method defined on it which will trace whatever things inside the T
|
|
* instance need tracing.
|
|
*
|
|
* This implementation has one serious drawback: operator= doesn't work right
|
|
* because it's declared on Rooted directly and expects the type Rooted is
|
|
* templated over.
|
|
*/
|
|
|
|
#ifndef mozilla_RootedRefPtr_h__
|
|
#define mozilla_RootedRefPtr_h__
|
|
|
|
#include "mozilla/RefPtr.h"
|
|
#include "js/GCPolicyAPI.h"
|
|
#include "js/TypeDecls.h"
|
|
|
|
namespace JS {
|
|
template <typename T>
|
|
struct GCPolicy<RefPtr<T>> {
|
|
static RefPtr<T> initial() { return RefPtr<T>(); }
|
|
|
|
static void trace(JSTracer* trc, RefPtr<T>* tp, const char* name) {
|
|
if (*tp) {
|
|
(*tp)->Trace(trc);
|
|
}
|
|
}
|
|
|
|
static bool isValid(const RefPtr<T>& v) {
|
|
return !v || GCPolicy<T>::isValid(*v.get());
|
|
}
|
|
};
|
|
} // namespace JS
|
|
|
|
namespace js {
|
|
template <typename T, typename Wrapper>
|
|
struct WrappedPtrOperations<RefPtr<T>, Wrapper> {
|
|
operator T*() const { return static_cast<const Wrapper*>(this)->get(); }
|
|
};
|
|
} // namespace js
|
|
|
|
#endif /* mozilla_RootedRefPtr_h__ */
|