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/*
* Copyright 2016 The WebRTC 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 in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "rtc_base/ref_counted_object.h"
#include <memory>
#include <string>
#include <type_traits>
#include <utility>
#include "api/scoped_refptr.h"
#include "rtc_base/ref_count.h"
#include "test/gtest.h"
namespace rtc {
namespace {
class A {
public:
A() {}
private:
RTC_DISALLOW_COPY_AND_ASSIGN(A);
};
class RefClass : public RefCountInterface {
public:
RefClass() {}
protected:
~RefClass() override {}
};
class RefClassWithRvalue : public RefCountInterface {
public:
explicit RefClassWithRvalue(std::unique_ptr<A> a) : a_(std::move(a)) {}
protected:
~RefClassWithRvalue() override {}
public:
std::unique_ptr<A> a_;
};
class RefClassWithMixedValues : public RefCountInterface {
public:
RefClassWithMixedValues(std::unique_ptr<A> a, int b, const std::string& c)
: a_(std::move(a)), b_(b), c_(c) {}
protected:
~RefClassWithMixedValues() override {}
public:
std::unique_ptr<A> a_;
int b_;
std::string c_;
};
class Foo {
public:
Foo() {}
Foo(int i, int j) : foo_(i + j) {}
int foo_ = 0;
};
class FooItf : public RefCountInterface {
public:
FooItf() {}
FooItf(int i, int j) : foo_(i + j) {}
int foo_ = 0;
};
} // namespace
TEST(RefCountedObject, HasOneRef) {
scoped_refptr<RefCountedObject<RefClass>> aref(
new RefCountedObject<RefClass>());
EXPECT_TRUE(aref->HasOneRef());
aref->AddRef();
EXPECT_FALSE(aref->HasOneRef());
EXPECT_EQ(aref->Release(), RefCountReleaseStatus::kOtherRefsRemained);
EXPECT_TRUE(aref->HasOneRef());
}
TEST(RefCountedObject, SupportRValuesInCtor) {
std::unique_ptr<A> a(new A());
scoped_refptr<RefClassWithRvalue> ref(
new RefCountedObject<RefClassWithRvalue>(std::move(a)));
EXPECT_TRUE(ref->a_.get() != nullptr);
EXPECT_TRUE(a.get() == nullptr);
}
TEST(RefCountedObject, SupportMixedTypesInCtor) {
std::unique_ptr<A> a(new A());
int b = 9;
std::string c = "hello";
scoped_refptr<RefClassWithMixedValues> ref(
new RefCountedObject<RefClassWithMixedValues>(std::move(a), b, c));
EXPECT_TRUE(ref->a_.get() != nullptr);
EXPECT_TRUE(a.get() == nullptr);
EXPECT_EQ(b, ref->b_);
EXPECT_EQ(c, ref->c_);
}
TEST(FinalRefCountedObject, CanWrapIntoScopedRefptr) {
using WrappedTyped = FinalRefCountedObject<A>;
static_assert(!std::is_polymorphic<WrappedTyped>::value, "");
scoped_refptr<WrappedTyped> ref(new WrappedTyped());
EXPECT_TRUE(ref.get());
EXPECT_TRUE(ref->HasOneRef());
// Test reference counter is updated on some simple operations.
scoped_refptr<WrappedTyped> ref2 = ref;
EXPECT_FALSE(ref->HasOneRef());
EXPECT_FALSE(ref2->HasOneRef());
ref = nullptr;
EXPECT_TRUE(ref2->HasOneRef());
}
TEST(FinalRefCountedObject, CanCreateFromMovedType) {
class MoveOnly {
public:
MoveOnly(int a) : a_(a) {}
MoveOnly(MoveOnly&&) = default;
int a() { return a_; }
private:
int a_;
};
MoveOnly foo(5);
auto ref = make_ref_counted<MoveOnly>(std::move(foo));
EXPECT_EQ(ref->a(), 5);
}
// This test is mostly a compile-time test for scoped_refptr compatibility.
TEST(RefCounted, SmartPointers) {
// Sanity compile-time tests. FooItf is virtual, Foo is not, FooItf inherits
// from RefCountInterface, Foo does not.
static_assert(std::is_base_of<RefCountInterface, FooItf>::value, "");
static_assert(!std::is_base_of<RefCountInterface, Foo>::value, "");
static_assert(std::is_polymorphic<FooItf>::value, "");
static_assert(!std::is_polymorphic<Foo>::value, "");
// Check if Ref generates the expected types for Foo and FooItf.
static_assert(std::is_base_of<Foo, Ref<Foo>::Type>::value &&
!std::is_same<Foo, Ref<Foo>::Type>::value,
"");
static_assert(std::is_same<FooItf, Ref<FooItf>::Type>::value, "");
{
// Test with FooItf, a class that inherits from RefCountInterface.
// Check that we get a valid FooItf reference counted object.
auto p = make_ref_counted<FooItf>(2, 3);
EXPECT_NE(p.get(), nullptr);
EXPECT_EQ(p->foo_, 5); // the FooItf ctor just stores 2+3 in foo_.
// Use a couple of different ways of declaring what should result in the
// same type as `p` is of.
scoped_refptr<Ref<FooItf>::Type> p2 = p;
Ref<FooItf>::Ptr p3 = p;
}
{
// Same for `Foo`
auto p = make_ref_counted<Foo>(2, 3);
EXPECT_NE(p.get(), nullptr);
EXPECT_EQ(p->foo_, 5);
scoped_refptr<Ref<Foo>::Type> p2 = p;
Ref<Foo>::Ptr p3 = p;
}
}
} // namespace rtc
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