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- // Copyright (c) 2012 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "base/memory/ref_counted.h"
- #include <type_traits>
- #include <utility>
- #include "base/memory/raw_ptr.h"
- #include "base/test/gtest_util.h"
- #include "build/build_config.h"
- #include "testing/gtest/include/gtest/gtest.h"
- namespace base {
- namespace subtle {
- namespace {
- class SelfAssign : public base::RefCounted<SelfAssign> {
- protected:
- virtual ~SelfAssign() = default;
- private:
- friend class base::RefCounted<SelfAssign>;
- };
- class Derived : public SelfAssign {
- protected:
- ~Derived() override = default;
- private:
- friend class base::RefCounted<Derived>;
- };
- class CheckDerivedMemberAccess : public scoped_refptr<SelfAssign> {
- public:
- CheckDerivedMemberAccess() {
- // This shouldn't compile if we don't have access to the member variable.
- SelfAssign** pptr = &ptr_;
- EXPECT_EQ(*pptr, ptr_);
- }
- };
- class ScopedRefPtrToSelf : public base::RefCounted<ScopedRefPtrToSelf> {
- public:
- ScopedRefPtrToSelf() : self_ptr_(this) {}
- static bool was_destroyed() { return was_destroyed_; }
- static void reset_was_destroyed() { was_destroyed_ = false; }
- scoped_refptr<ScopedRefPtrToSelf> self_ptr_;
- private:
- friend class base::RefCounted<ScopedRefPtrToSelf>;
- ~ScopedRefPtrToSelf() { was_destroyed_ = true; }
- static bool was_destroyed_;
- };
- bool ScopedRefPtrToSelf::was_destroyed_ = false;
- class ScopedRefPtrCountBase : public base::RefCounted<ScopedRefPtrCountBase> {
- public:
- ScopedRefPtrCountBase() { ++constructor_count_; }
- static int constructor_count() { return constructor_count_; }
- static int destructor_count() { return destructor_count_; }
- static void reset_count() {
- constructor_count_ = 0;
- destructor_count_ = 0;
- }
- protected:
- virtual ~ScopedRefPtrCountBase() { ++destructor_count_; }
- private:
- friend class base::RefCounted<ScopedRefPtrCountBase>;
- static int constructor_count_;
- static int destructor_count_;
- };
- int ScopedRefPtrCountBase::constructor_count_ = 0;
- int ScopedRefPtrCountBase::destructor_count_ = 0;
- class ScopedRefPtrCountDerived : public ScopedRefPtrCountBase {
- public:
- ScopedRefPtrCountDerived() { ++constructor_count_; }
- static int constructor_count() { return constructor_count_; }
- static int destructor_count() { return destructor_count_; }
- static void reset_count() {
- constructor_count_ = 0;
- destructor_count_ = 0;
- }
- protected:
- ~ScopedRefPtrCountDerived() override { ++destructor_count_; }
- private:
- friend class base::RefCounted<ScopedRefPtrCountDerived>;
- static int constructor_count_;
- static int destructor_count_;
- };
- int ScopedRefPtrCountDerived::constructor_count_ = 0;
- int ScopedRefPtrCountDerived::destructor_count_ = 0;
- class Other : public base::RefCounted<Other> {
- private:
- friend class base::RefCounted<Other>;
- ~Other() = default;
- };
- class HasPrivateDestructorWithDeleter;
- struct Deleter {
- static void Destruct(const HasPrivateDestructorWithDeleter* x);
- };
- class HasPrivateDestructorWithDeleter
- : public base::RefCounted<HasPrivateDestructorWithDeleter, Deleter> {
- public:
- HasPrivateDestructorWithDeleter() = default;
- private:
- friend struct Deleter;
- ~HasPrivateDestructorWithDeleter() = default;
- };
- void Deleter::Destruct(const HasPrivateDestructorWithDeleter* x) {
- delete x;
- }
- scoped_refptr<Other> Overloaded(scoped_refptr<Other> other) {
- return other;
- }
- scoped_refptr<SelfAssign> Overloaded(scoped_refptr<SelfAssign> self_assign) {
- return self_assign;
- }
- class InitialRefCountIsOne : public base::RefCounted<InitialRefCountIsOne> {
- public:
- REQUIRE_ADOPTION_FOR_REFCOUNTED_TYPE();
- InitialRefCountIsOne() = default;
- private:
- friend class base::RefCounted<InitialRefCountIsOne>;
- ~InitialRefCountIsOne() = default;
- };
- // Checks that the scoped_refptr is null before the reference counted object is
- // destroyed.
- class CheckRefptrNull : public base::RefCounted<CheckRefptrNull> {
- public:
- // Set the last scoped_refptr that will have a reference to this object.
- void set_scoped_refptr(scoped_refptr<CheckRefptrNull>* ptr) { ptr_ = ptr; }
- protected:
- virtual ~CheckRefptrNull() {
- EXPECT_NE(ptr_, nullptr);
- EXPECT_EQ(ptr_->get(), nullptr);
- }
- private:
- friend class base::RefCounted<CheckRefptrNull>;
- raw_ptr<scoped_refptr<CheckRefptrNull>> ptr_ = nullptr;
- };
- class Overflow : public base::RefCounted<Overflow> {
- public:
- Overflow() = default;
- private:
- friend class base::RefCounted<Overflow>;
- ~Overflow() = default;
- };
- } // namespace
- TEST(RefCountedUnitTest, TestSelfAssignment) {
- SelfAssign* p = new SelfAssign;
- scoped_refptr<SelfAssign> var(p);
- var = *&var; // The *& defeats Clang's -Wself-assign warning.
- EXPECT_EQ(var.get(), p);
- var = std::move(var);
- EXPECT_EQ(var.get(), p);
- var.swap(var);
- EXPECT_EQ(var.get(), p);
- swap(var, var);
- EXPECT_EQ(var.get(), p);
- }
- TEST(RefCountedUnitTest, ScopedRefPtrMemberAccess) {
- CheckDerivedMemberAccess check;
- }
- TEST(RefCountedUnitTest, ScopedRefPtrToSelfPointerAssignment) {
- ScopedRefPtrToSelf::reset_was_destroyed();
- ScopedRefPtrToSelf* check = new ScopedRefPtrToSelf();
- EXPECT_FALSE(ScopedRefPtrToSelf::was_destroyed());
- check->self_ptr_ = nullptr;
- EXPECT_TRUE(ScopedRefPtrToSelf::was_destroyed());
- }
- TEST(RefCountedUnitTest, ScopedRefPtrToSelfMoveAssignment) {
- ScopedRefPtrToSelf::reset_was_destroyed();
- ScopedRefPtrToSelf* check = new ScopedRefPtrToSelf();
- EXPECT_FALSE(ScopedRefPtrToSelf::was_destroyed());
- // Releasing |check->self_ptr_| will delete |check|.
- // The move assignment operator must assign |check->self_ptr_| first then
- // release |check->self_ptr_|.
- check->self_ptr_ = scoped_refptr<ScopedRefPtrToSelf>();
- EXPECT_TRUE(ScopedRefPtrToSelf::was_destroyed());
- }
- TEST(RefCountedUnitTest, BooleanTesting) {
- scoped_refptr<SelfAssign> ptr_to_an_instance = new SelfAssign;
- EXPECT_TRUE(ptr_to_an_instance);
- EXPECT_FALSE(!ptr_to_an_instance);
- if (ptr_to_an_instance) {
- } else {
- ADD_FAILURE() << "Pointer to an instance should result in true.";
- }
- if (!ptr_to_an_instance) { // check for operator!().
- ADD_FAILURE() << "Pointer to an instance should result in !x being false.";
- }
- scoped_refptr<SelfAssign> null_ptr;
- EXPECT_FALSE(null_ptr);
- EXPECT_TRUE(!null_ptr);
- if (null_ptr) {
- ADD_FAILURE() << "Null pointer should result in false.";
- }
- if (!null_ptr) { // check for operator!().
- } else {
- ADD_FAILURE() << "Null pointer should result in !x being true.";
- }
- }
- TEST(RefCountedUnitTest, Equality) {
- scoped_refptr<SelfAssign> p1(new SelfAssign);
- scoped_refptr<SelfAssign> p2(new SelfAssign);
- EXPECT_EQ(p1, p1);
- EXPECT_EQ(p2, p2);
- EXPECT_NE(p1, p2);
- EXPECT_NE(p2, p1);
- }
- TEST(RefCountedUnitTest, NullptrEquality) {
- scoped_refptr<SelfAssign> ptr_to_an_instance(new SelfAssign);
- scoped_refptr<SelfAssign> ptr_to_nullptr;
- EXPECT_NE(nullptr, ptr_to_an_instance);
- EXPECT_NE(ptr_to_an_instance, nullptr);
- EXPECT_EQ(nullptr, ptr_to_nullptr);
- EXPECT_EQ(ptr_to_nullptr, nullptr);
- }
- TEST(RefCountedUnitTest, ConvertibleEquality) {
- scoped_refptr<Derived> p1(new Derived);
- scoped_refptr<SelfAssign> p2;
- EXPECT_NE(p1, p2);
- EXPECT_NE(p2, p1);
- p2 = p1;
- EXPECT_EQ(p1, p2);
- EXPECT_EQ(p2, p1);
- }
- TEST(RefCountedUnitTest, MoveAssignment1) {
- ScopedRefPtrCountBase::reset_count();
- {
- ScopedRefPtrCountBase *raw = new ScopedRefPtrCountBase();
- scoped_refptr<ScopedRefPtrCountBase> p1(raw);
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- {
- scoped_refptr<ScopedRefPtrCountBase> p2;
- p2 = std::move(p1);
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- EXPECT_EQ(nullptr, p1.get());
- EXPECT_EQ(raw, p2.get());
- // p2 goes out of scope.
- }
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
- // p1 goes out of scope.
- }
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
- }
- TEST(RefCountedUnitTest, MoveAssignment2) {
- ScopedRefPtrCountBase::reset_count();
- {
- ScopedRefPtrCountBase *raw = new ScopedRefPtrCountBase();
- scoped_refptr<ScopedRefPtrCountBase> p1;
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- {
- scoped_refptr<ScopedRefPtrCountBase> p2(raw);
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- p1 = std::move(p2);
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- EXPECT_EQ(raw, p1.get());
- EXPECT_EQ(nullptr, p2.get());
- // p2 goes out of scope.
- }
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- // p1 goes out of scope.
- }
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
- }
- TEST(RefCountedUnitTest, MoveAssignmentSameInstance1) {
- ScopedRefPtrCountBase::reset_count();
- {
- ScopedRefPtrCountBase *raw = new ScopedRefPtrCountBase();
- scoped_refptr<ScopedRefPtrCountBase> p1(raw);
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- {
- scoped_refptr<ScopedRefPtrCountBase> p2(p1);
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- p1 = std::move(p2);
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- EXPECT_EQ(raw, p1.get());
- EXPECT_EQ(nullptr, p2.get());
- // p2 goes out of scope.
- }
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- // p1 goes out of scope.
- }
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
- }
- TEST(RefCountedUnitTest, MoveAssignmentSameInstance2) {
- ScopedRefPtrCountBase::reset_count();
- {
- ScopedRefPtrCountBase *raw = new ScopedRefPtrCountBase();
- scoped_refptr<ScopedRefPtrCountBase> p1(raw);
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- {
- scoped_refptr<ScopedRefPtrCountBase> p2(p1);
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- p2 = std::move(p1);
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- EXPECT_EQ(nullptr, p1.get());
- EXPECT_EQ(raw, p2.get());
- // p2 goes out of scope.
- }
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
- // p1 goes out of scope.
- }
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
- }
- TEST(RefCountedUnitTest, MoveAssignmentDifferentInstances) {
- ScopedRefPtrCountBase::reset_count();
- {
- ScopedRefPtrCountBase *raw1 = new ScopedRefPtrCountBase();
- scoped_refptr<ScopedRefPtrCountBase> p1(raw1);
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- {
- ScopedRefPtrCountBase *raw2 = new ScopedRefPtrCountBase();
- scoped_refptr<ScopedRefPtrCountBase> p2(raw2);
- EXPECT_EQ(2, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- p1 = std::move(p2);
- EXPECT_EQ(2, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
- EXPECT_EQ(raw2, p1.get());
- EXPECT_EQ(nullptr, p2.get());
- // p2 goes out of scope.
- }
- EXPECT_EQ(2, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
- // p1 goes out of scope.
- }
- EXPECT_EQ(2, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(2, ScopedRefPtrCountBase::destructor_count());
- }
- TEST(RefCountedUnitTest, MoveAssignmentSelfMove) {
- ScopedRefPtrCountBase::reset_count();
- {
- ScopedRefPtrCountBase* raw = new ScopedRefPtrCountBase;
- scoped_refptr<ScopedRefPtrCountBase> p1(raw);
- scoped_refptr<ScopedRefPtrCountBase>& p1_ref = p1;
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- p1 = std::move(p1_ref);
- // |p1| is "valid but unspecified", so don't bother inspecting its
- // contents, just ensure that we don't crash.
- }
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
- }
- TEST(RefCountedUnitTest, MoveAssignmentDerived) {
- ScopedRefPtrCountBase::reset_count();
- ScopedRefPtrCountDerived::reset_count();
- {
- ScopedRefPtrCountBase *raw1 = new ScopedRefPtrCountBase();
- scoped_refptr<ScopedRefPtrCountBase> p1(raw1);
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountDerived::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountDerived::destructor_count());
- {
- ScopedRefPtrCountDerived *raw2 = new ScopedRefPtrCountDerived();
- scoped_refptr<ScopedRefPtrCountDerived> p2(raw2);
- EXPECT_EQ(2, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountDerived::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountDerived::destructor_count());
- p1 = std::move(p2);
- EXPECT_EQ(2, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountDerived::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountDerived::destructor_count());
- EXPECT_EQ(raw2, p1.get());
- EXPECT_EQ(nullptr, p2.get());
- // p2 goes out of scope.
- }
- EXPECT_EQ(2, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountDerived::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountDerived::destructor_count());
- // p1 goes out of scope.
- }
- EXPECT_EQ(2, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(2, ScopedRefPtrCountBase::destructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountDerived::constructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountDerived::destructor_count());
- }
- TEST(RefCountedUnitTest, MoveConstructor) {
- ScopedRefPtrCountBase::reset_count();
- {
- ScopedRefPtrCountBase *raw = new ScopedRefPtrCountBase();
- scoped_refptr<ScopedRefPtrCountBase> p1(raw);
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- {
- scoped_refptr<ScopedRefPtrCountBase> p2(std::move(p1));
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- EXPECT_EQ(nullptr, p1.get());
- EXPECT_EQ(raw, p2.get());
- // p2 goes out of scope.
- }
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
- // p1 goes out of scope.
- }
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
- }
- TEST(RefCountedUnitTest, MoveConstructorDerived) {
- ScopedRefPtrCountBase::reset_count();
- ScopedRefPtrCountDerived::reset_count();
- {
- ScopedRefPtrCountDerived *raw1 = new ScopedRefPtrCountDerived();
- scoped_refptr<ScopedRefPtrCountDerived> p1(raw1);
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountDerived::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountDerived::destructor_count());
- {
- scoped_refptr<ScopedRefPtrCountBase> p2(std::move(p1));
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountBase::destructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountDerived::constructor_count());
- EXPECT_EQ(0, ScopedRefPtrCountDerived::destructor_count());
- EXPECT_EQ(nullptr, p1.get());
- EXPECT_EQ(raw1, p2.get());
- // p2 goes out of scope.
- }
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountDerived::constructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountDerived::destructor_count());
- // p1 goes out of scope.
- }
- EXPECT_EQ(1, ScopedRefPtrCountBase::constructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountBase::destructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountDerived::constructor_count());
- EXPECT_EQ(1, ScopedRefPtrCountDerived::destructor_count());
- }
- TEST(RefCountedUnitTest, TestOverloadResolutionCopy) {
- const scoped_refptr<Derived> derived(new Derived);
- const scoped_refptr<SelfAssign> expected(derived);
- EXPECT_EQ(expected, Overloaded(derived));
- const scoped_refptr<Other> other(new Other);
- EXPECT_EQ(other, Overloaded(other));
- }
- TEST(RefCountedUnitTest, TestOverloadResolutionMove) {
- scoped_refptr<Derived> derived(new Derived);
- const scoped_refptr<SelfAssign> expected(derived);
- EXPECT_EQ(expected, Overloaded(std::move(derived)));
- scoped_refptr<Other> other(new Other);
- const scoped_refptr<Other> other2(other);
- EXPECT_EQ(other2, Overloaded(std::move(other)));
- }
- TEST(RefCountedUnitTest, TestMakeRefCounted) {
- scoped_refptr<Derived> derived = new Derived;
- EXPECT_TRUE(derived->HasOneRef());
- derived.reset();
- scoped_refptr<Derived> derived2 = base::MakeRefCounted<Derived>();
- EXPECT_TRUE(derived2->HasOneRef());
- derived2.reset();
- }
- TEST(RefCountedUnitTest, TestInitialRefCountIsOne) {
- scoped_refptr<InitialRefCountIsOne> obj =
- base::MakeRefCounted<InitialRefCountIsOne>();
- EXPECT_TRUE(obj->HasOneRef());
- obj.reset();
- scoped_refptr<InitialRefCountIsOne> obj2 =
- base::AdoptRef(new InitialRefCountIsOne);
- EXPECT_TRUE(obj2->HasOneRef());
- obj2.reset();
- scoped_refptr<Other> obj3 = base::MakeRefCounted<Other>();
- EXPECT_TRUE(obj3->HasOneRef());
- obj3.reset();
- }
- TEST(RefCountedUnitTest, TestPrivateDestructorWithDeleter) {
- // Ensure that RefCounted doesn't need the access to the pointee dtor when
- // a custom deleter is given.
- scoped_refptr<HasPrivateDestructorWithDeleter> obj =
- base::MakeRefCounted<HasPrivateDestructorWithDeleter>();
- }
- TEST(RefCountedUnitTest, TestReset) {
- ScopedRefPtrCountBase::reset_count();
- // Create ScopedRefPtrCountBase that is referenced by |obj1| and |obj2|.
- scoped_refptr<ScopedRefPtrCountBase> obj1 =
- base::MakeRefCounted<ScopedRefPtrCountBase>();
- scoped_refptr<ScopedRefPtrCountBase> obj2 = obj1;
- EXPECT_NE(obj1.get(), nullptr);
- EXPECT_NE(obj2.get(), nullptr);
- EXPECT_EQ(ScopedRefPtrCountBase::constructor_count(), 1);
- EXPECT_EQ(ScopedRefPtrCountBase::destructor_count(), 0);
- // Check that calling reset() on |obj1| resets it. |obj2| still has a
- // reference to the ScopedRefPtrCountBase so it shouldn't be reset.
- obj1.reset();
- EXPECT_EQ(obj1.get(), nullptr);
- EXPECT_EQ(ScopedRefPtrCountBase::constructor_count(), 1);
- EXPECT_EQ(ScopedRefPtrCountBase::destructor_count(), 0);
- // Check that calling reset() on |obj2| resets it and causes the deletion of
- // the ScopedRefPtrCountBase.
- obj2.reset();
- EXPECT_EQ(obj2.get(), nullptr);
- EXPECT_EQ(ScopedRefPtrCountBase::constructor_count(), 1);
- EXPECT_EQ(ScopedRefPtrCountBase::destructor_count(), 1);
- }
- TEST(RefCountedUnitTest, TestResetAlreadyNull) {
- // Check that calling reset() on a null scoped_refptr does nothing.
- scoped_refptr<ScopedRefPtrCountBase> obj;
- obj.reset();
- // |obj| should still be null after calling reset().
- EXPECT_EQ(obj.get(), nullptr);
- }
- TEST(RefCountedUnitTest, TestResetByNullptrAssignment) {
- // Check that assigning nullptr resets the object.
- auto obj = base::MakeRefCounted<ScopedRefPtrCountBase>();
- EXPECT_NE(obj.get(), nullptr);
- obj = nullptr;
- EXPECT_EQ(obj.get(), nullptr);
- }
- TEST(RefCountedUnitTest, CheckScopedRefptrNullBeforeObjectDestruction) {
- scoped_refptr<CheckRefptrNull> obj = base::MakeRefCounted<CheckRefptrNull>();
- obj->set_scoped_refptr(&obj);
- // Check that when reset() is called the scoped_refptr internal pointer is set
- // to null before the reference counted object is destroyed. This check is
- // done by the CheckRefptrNull destructor.
- obj.reset();
- EXPECT_EQ(obj.get(), nullptr);
- }
- TEST(RefCountedDeathTest, TestAdoptRef) {
- // Check that WrapRefCounted() DCHECKs if passed a type that defines
- // REQUIRE_ADOPTION_FOR_REFCOUNTED_TYPE.
- EXPECT_DCHECK_DEATH(base::WrapRefCounted(new InitialRefCountIsOne));
- // Check that AdoptRef() DCHECKs if passed a nullptr.
- InitialRefCountIsOne* ptr = nullptr;
- EXPECT_DCHECK_DEATH(base::AdoptRef(ptr));
- // Check that AdoptRef() DCHECKs if passed an object that doesn't need to be
- // adopted.
- scoped_refptr<InitialRefCountIsOne> obj =
- base::MakeRefCounted<InitialRefCountIsOne>();
- EXPECT_DCHECK_DEATH(base::AdoptRef(obj.get()));
- }
- #if defined(ARCH_CPU_64_BITS)
- TEST(RefCountedDeathTest, TestOverflowCheck) {
- auto p = base::MakeRefCounted<Overflow>();
- p->ref_count_ = std::numeric_limits<uint32_t>::max();
- EXPECT_CHECK_DEATH(p->AddRef());
- // Ensure `p` doesn't leak and fail lsan builds.
- p->ref_count_ = 1;
- }
- #endif
- } // namespace subtle
- } // namespace base
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