tools/clang/blink_gc_plugin/tests/cycle_ptrs.h

   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 CYCLE_PTRS_H_
   6 #define CYCLE_PTRS_H_
   7
   8 #include "heap/stubs.h"
   9
  10 namespace blink {
  11
  12 class B;
  13 class C;
  14 class D;
  15 class E;
  16
  17 // This contains a leaking cycle:
  18 // E -per-> A -mem-> B -ref-> C -own-> D -own-vec-> E
  19
  20 // The traced cycle from A -> B -> A does not leak.
  21
  22 class A : public GarbageCollected<A> {
  23 public:
  24     virtual void trace(Visitor*);
  25 private:
  26     Member<B> m_b;
  27 };
  28
  29 class B : public GarbageCollectedFinalized<B> {
  30 public:
  31     virtual void trace(Visitor*);
  32 private:
  33     Member<A> m_a;
  34     RefPtr<C> m_c;
  35 };
  36
  37 class C : public RefCounted<C> {
  38 private:
  39     OwnPtr<D> m_d;
  40 };
  41
  42 class D {
  43 private:
  44     Vector<OwnPtr<E> > m_es;
  45 };
  46
  47 class E {
  48 private:
  49     Persistent<A> m_a;
  50 };
  51
  52 }
  53
  54 #endif