1// Copyright 2014 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#ifndef STACK_ALLOCATED_H_ 6#define STACK_ALLOCATED_H_ 7 8#include "heap/stubs.h" 9 10namespace blink { 11 12class HeapObject; 13 14class PartObject { 15 DISALLOW_ALLOCATION(); 16private: 17 Member<HeapObject> m_obj; // Needs tracing. 18}; 19 20class StackObject { 21 STACK_ALLOCATED(); 22private: 23 Member<HeapObject> m_obj; // Does not need tracing. 24}; 25 26class AnotherStackObject : public PartObject { // Invalid base. 27 STACK_ALLOCATED(); 28private: 29 StackObject m_part; // Can embed a stack allocated object. 30}; 31 32class HeapObject : public GarbageCollected<HeapObject> { 33public: 34 void trace(Visitor*); 35private: 36 StackObject m_part; // Cannot embed a stack allocated object. 37}; 38 39// STACK_ALLOCATED is inherited. 40class DerivedStackObject : public StackObject { 41private: 42 AnotherStackObject m_anotherPart; // Also fine. 43}; 44 45} 46 47#endif 48