1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
7 /* an object with the same layout as a Rust std::cell::Cell<T> */
9 #ifndef mozilla_RustCell_h
10 #define mozilla_RustCell_h
15 * Object with the same layout as std::cell::Cell<T>.
17 * ServoBindings.toml defines a mapping so that generated bindings use a
18 * real std::cell::Cell<T>.
20 * Note that while the layout matches, this doesn't have the same ABI as a
21 * std::cell::Cell<T>, so values of this type can't be passed over FFI
27 RustCell() : mValue() {}
28 explicit RustCell(T aValue
) : mValue(aValue
) {}
30 T
Get() const { return mValue
; }
31 void Set(T aValue
) { mValue
= aValue
; }
33 // That this API doesn't mirror the API of rust's Cell because all values in
34 // C++ effectively act like they're wrapped in Cell<...> already, so this type
35 // only exists for FFI purposes.
36 T
* AsPtr() { return &mValue
; }
37 const T
* AsPtr() const { return &mValue
; }
43 } // namespace mozilla
45 #endif // mozilla_RustCell_h