/* -*- 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/. */ #include "mozilla/RefPtr.h" #include "mozilla/RefCounted.h" using mozilla::RefCounted; class Foo : public RefCounted<Foo> { public: MOZ_DECLARE_REFCOUNTED_TYPENAME(Foo) Foo() : mDead(false) {} static int sNumDestroyed; ~Foo() { MOZ_ASSERT(!mDead); mDead = true; sNumDestroyed++; } private: bool mDead; }; int Foo::sNumDestroyed; struct Bar : public Foo {}; already_AddRefed<Foo> NewFoo() { RefPtr<Foo> f(new Foo()); return f.forget(); } already_AddRefed<Foo> NewBar() { RefPtr<Bar> bar = new Bar(); return bar.forget(); } void GetNewFoo(Foo** aFoo) { *aFoo = new Bar(); // Kids, don't try this at home (*aFoo)->AddRef(); } void GetNewFoo(RefPtr<Foo>* aFoo) { *aFoo = new Bar(); } already_AddRefed<Foo> GetNullFoo() { return 0; } int main() { MOZ_RELEASE_ASSERT(0 == Foo::sNumDestroyed); { RefPtr<Foo> f = new Foo(); MOZ_RELEASE_ASSERT(f->refCount() == 1); } MOZ_RELEASE_ASSERT(1 == Foo::sNumDestroyed); { RefPtr<Foo> f1 = NewFoo(); RefPtr<Foo> f2(NewFoo()); MOZ_RELEASE_ASSERT(1 == Foo::sNumDestroyed); } MOZ_RELEASE_ASSERT(3 == Foo::sNumDestroyed); { RefPtr<Foo> b = NewBar(); MOZ_RELEASE_ASSERT(3 == Foo::sNumDestroyed); } MOZ_RELEASE_ASSERT(4 == Foo::sNumDestroyed); { RefPtr<Foo> f1; { f1 = new Foo(); RefPtr<Foo> f2(f1); RefPtr<Foo> f3 = f2; MOZ_RELEASE_ASSERT(4 == Foo::sNumDestroyed); } MOZ_RELEASE_ASSERT(4 == Foo::sNumDestroyed); } MOZ_RELEASE_ASSERT(5 == Foo::sNumDestroyed); { { RefPtr<Foo> f = new Foo(); RefPtr<Foo> g = f.forget(); } MOZ_RELEASE_ASSERT(6 == Foo::sNumDestroyed); } { RefPtr<Foo> f = new Foo(); GetNewFoo(getter_AddRefs(f)); MOZ_RELEASE_ASSERT(7 == Foo::sNumDestroyed); } MOZ_RELEASE_ASSERT(8 == Foo::sNumDestroyed); { RefPtr<Foo> f = new Foo(); GetNewFoo(&f); MOZ_RELEASE_ASSERT(9 == Foo::sNumDestroyed); } MOZ_RELEASE_ASSERT(10 == Foo::sNumDestroyed); { RefPtr<Foo> f1 = new Bar(); } MOZ_RELEASE_ASSERT(11 == Foo::sNumDestroyed); { RefPtr<Foo> f = GetNullFoo(); MOZ_RELEASE_ASSERT(11 == Foo::sNumDestroyed); } MOZ_RELEASE_ASSERT(11 == Foo::sNumDestroyed); return 0; }