// Copyright 2020 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef INCLUDE_CPPGC_PREFINALIZER_H_ #define INCLUDE_CPPGC_PREFINALIZER_H_ #include "cppgc/internal/compiler-specific.h" #include "cppgc/liveness-broker.h" namespace cppgc { namespace internal { class V8_EXPORT PrefinalizerRegistration final { … }; } // namespace internal /** * Macro must be used in the private section of `Class` and registers a * prefinalization callback `void Class::PreFinalizer()`. The callback is * invoked on garbage collection after the collector has found an object to be * dead. * * Callback properties: * - The callback is invoked before a possible destructor for the corresponding * object. * - The callback may access the whole object graph, irrespective of whether * objects are considered dead or alive. * - The callback is invoked on the same thread as the object was created on. * * Example: * \code * class WithPrefinalizer : public GarbageCollected<WithPrefinalizer> { * CPPGC_USING_PRE_FINALIZER(WithPrefinalizer, Dispose); * * public: * void Trace(Visitor*) const {} * void Dispose() { prefinalizer_called = true; } * ~WithPrefinalizer() { * // prefinalizer_called == true * } * private: * bool prefinalizer_called = false; * }; * \endcode */ #define CPPGC_USING_PRE_FINALIZER(Class, PreFinalizer) … } // namespace cppgc #endif // INCLUDE_CPPGC_PREFINALIZER_H_