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8df643b387
To add ref counting to any class while avoiding virtual functions for reference counting. This template can both slightly reduce binary size and slightly improve performance. Bug: webrtc:11308 Change-Id: I90ac735f6c220ee2a1a991a71039acdb0ca86453 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/198845 Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33058}
114 lines
2.8 KiB
C++
114 lines
2.8 KiB
C++
/*
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* Copyright 2016 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "rtc_base/ref_counted_object.h"
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#include <memory>
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#include <string>
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#include <type_traits>
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#include <utility>
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#include "api/scoped_refptr.h"
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#include "rtc_base/ref_count.h"
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#include "test/gtest.h"
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namespace rtc {
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namespace {
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class A {
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public:
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A() {}
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private:
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RTC_DISALLOW_COPY_AND_ASSIGN(A);
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};
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class RefClass : public RefCountInterface {
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public:
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RefClass() {}
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protected:
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~RefClass() override {}
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};
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class RefClassWithRvalue : public RefCountInterface {
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public:
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explicit RefClassWithRvalue(std::unique_ptr<A> a) : a_(std::move(a)) {}
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protected:
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~RefClassWithRvalue() override {}
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public:
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std::unique_ptr<A> a_;
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};
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class RefClassWithMixedValues : public RefCountInterface {
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public:
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RefClassWithMixedValues(std::unique_ptr<A> a, int b, const std::string& c)
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: a_(std::move(a)), b_(b), c_(c) {}
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protected:
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~RefClassWithMixedValues() override {}
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public:
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std::unique_ptr<A> a_;
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int b_;
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std::string c_;
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};
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} // namespace
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TEST(RefCountedObject, HasOneRef) {
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scoped_refptr<RefCountedObject<RefClass>> aref(
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new RefCountedObject<RefClass>());
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EXPECT_TRUE(aref->HasOneRef());
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aref->AddRef();
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EXPECT_FALSE(aref->HasOneRef());
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EXPECT_EQ(aref->Release(), RefCountReleaseStatus::kOtherRefsRemained);
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EXPECT_TRUE(aref->HasOneRef());
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}
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TEST(RefCountedObject, SupportRValuesInCtor) {
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std::unique_ptr<A> a(new A());
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scoped_refptr<RefClassWithRvalue> ref(
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new RefCountedObject<RefClassWithRvalue>(std::move(a)));
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EXPECT_TRUE(ref->a_.get() != nullptr);
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EXPECT_TRUE(a.get() == nullptr);
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}
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TEST(RefCountedObject, SupportMixedTypesInCtor) {
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std::unique_ptr<A> a(new A());
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int b = 9;
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std::string c = "hello";
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scoped_refptr<RefClassWithMixedValues> ref(
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new RefCountedObject<RefClassWithMixedValues>(std::move(a), b, c));
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EXPECT_TRUE(ref->a_.get() != nullptr);
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EXPECT_TRUE(a.get() == nullptr);
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EXPECT_EQ(b, ref->b_);
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EXPECT_EQ(c, ref->c_);
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}
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TEST(FinalRefCountedObject, CanWrapIntoScopedRefptr) {
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using WrappedTyped = FinalRefCountedObject<A>;
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static_assert(!std::is_polymorphic<WrappedTyped>::value, "");
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scoped_refptr<WrappedTyped> ref(new WrappedTyped());
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EXPECT_TRUE(ref.get());
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EXPECT_TRUE(ref->HasOneRef());
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// Test reference counter is updated on some simple operations.
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scoped_refptr<WrappedTyped> ref2 = ref;
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EXPECT_FALSE(ref->HasOneRef());
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EXPECT_FALSE(ref2->HasOneRef());
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ref = nullptr;
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EXPECT_TRUE(ref2->HasOneRef());
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}
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} // namespace rtc
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