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Diffstat (limited to '')
| -rw-r--r-- | xpcom/tests/gtest/TestNsRefPtr.cpp | 444 |
1 files changed, 444 insertions, 0 deletions
diff --git a/xpcom/tests/gtest/TestNsRefPtr.cpp b/xpcom/tests/gtest/TestNsRefPtr.cpp new file mode 100644 index 0000000000..cd89f2e86f --- /dev/null +++ b/xpcom/tests/gtest/TestNsRefPtr.cpp @@ -0,0 +1,444 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* 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 "nsCOMPtr.h" +#include "nsISupports.h" +#include "nsQueryObject.h" +#include "mozilla/Unused.h" + +#include "gtest/gtest.h" + +namespace TestNsRefPtr { + +#define NS_FOO_IID \ + { \ + 0x6f7652e0, 0xee43, 0x11d1, { \ + 0x9c, 0xc3, 0x00, 0x60, 0x08, 0x8c, 0xa6, 0xb3 \ + } \ + } + +class Foo : public nsISupports { + public: + NS_DECLARE_STATIC_IID_ACCESSOR(NS_FOO_IID) + + public: + Foo(); + // virtual dtor because Bar uses our Release() + virtual ~Foo(); + + NS_IMETHOD_(MozExternalRefCountType) AddRef() override; + NS_IMETHOD_(MozExternalRefCountType) Release() override; + NS_IMETHOD QueryInterface(const nsIID&, void**) override; + void MemberFunction(int, int*, int&); + virtual void VirtualMemberFunction(int, int*, int&); + virtual void VirtualConstMemberFunction(int, int*, int&) const; + + void NonconstMethod() {} + void ConstMethod() const {} + + int refcount_; + + static int total_constructions_; + static int total_destructions_; + static int total_addrefs_; + static int total_queries_; +}; + +NS_DEFINE_STATIC_IID_ACCESSOR(Foo, NS_FOO_IID) + +int Foo::total_constructions_; +int Foo::total_destructions_; +int Foo::total_addrefs_; +int Foo::total_queries_; + +Foo::Foo() : refcount_(0) { ++total_constructions_; } + +Foo::~Foo() { ++total_destructions_; } + +MozExternalRefCountType Foo::AddRef() { + ++refcount_; + ++total_addrefs_; + return refcount_; +} + +MozExternalRefCountType Foo::Release() { + int newcount = --refcount_; + if (newcount == 0) { + delete this; + } + + return newcount; +} + +nsresult Foo::QueryInterface(const nsIID& aIID, void** aResult) { + ++total_queries_; + + nsISupports* rawPtr = 0; + nsresult status = NS_OK; + + if (aIID.Equals(NS_GET_IID(Foo))) + rawPtr = this; + else { + nsID iid_of_ISupports = NS_ISUPPORTS_IID; + if (aIID.Equals(iid_of_ISupports)) + rawPtr = static_cast<nsISupports*>(this); + else + status = NS_ERROR_NO_INTERFACE; + } + + NS_IF_ADDREF(rawPtr); + *aResult = rawPtr; + + return status; +} + +void Foo::MemberFunction(int aArg1, int* aArgPtr, int& aArgRef) {} + +void Foo::VirtualMemberFunction(int aArg1, int* aArgPtr, int& aArgRef) {} + +void Foo::VirtualConstMemberFunction(int aArg1, int* aArgPtr, + int& aArgRef) const {} + +static nsresult CreateFoo(void** result) +// a typical factory function (that calls AddRef) +{ + auto* foop = new Foo; + + foop->AddRef(); + *result = foop; + + return NS_OK; +} + +static void set_a_Foo(RefPtr<Foo>* result) { + assert(result); + + RefPtr<Foo> foop(do_QueryObject(new Foo)); + *result = foop; +} + +static RefPtr<Foo> return_a_Foo() { + RefPtr<Foo> foop(do_QueryObject(new Foo)); + return foop; +} + +#define NS_BAR_IID \ + { \ + 0x6f7652e1, 0xee43, 0x11d1, { \ + 0x9c, 0xc3, 0x00, 0x60, 0x08, 0x8c, 0xa6, 0xb3 \ + } \ + } + +class Bar : public Foo { + public: + NS_DECLARE_STATIC_IID_ACCESSOR(NS_BAR_IID) + + public: + Bar(); + ~Bar() override; + + NS_IMETHOD QueryInterface(const nsIID&, void**) override; + + void VirtualMemberFunction(int, int*, int&) override; + void VirtualConstMemberFunction(int, int*, int&) const override; + + static int total_constructions_; + static int total_destructions_; + static int total_queries_; +}; + +NS_DEFINE_STATIC_IID_ACCESSOR(Bar, NS_BAR_IID) + +int Bar::total_constructions_; +int Bar::total_destructions_; +int Bar::total_queries_; + +Bar::Bar() { ++total_constructions_; } + +Bar::~Bar() { ++total_destructions_; } + +nsresult Bar::QueryInterface(const nsID& aIID, void** aResult) { + ++total_queries_; + + nsISupports* rawPtr = 0; + nsresult status = NS_OK; + + if (aIID.Equals(NS_GET_IID(Bar))) + rawPtr = this; + else if (aIID.Equals(NS_GET_IID(Foo))) + rawPtr = static_cast<Foo*>(this); + else { + nsID iid_of_ISupports = NS_ISUPPORTS_IID; + if (aIID.Equals(iid_of_ISupports)) + rawPtr = static_cast<nsISupports*>(this); + else + status = NS_ERROR_NO_INTERFACE; + } + + NS_IF_ADDREF(rawPtr); + *aResult = rawPtr; + + return status; +} + +void Bar::VirtualMemberFunction(int aArg1, int* aArgPtr, int& aArgRef) {} +void Bar::VirtualConstMemberFunction(int aArg1, int* aArgPtr, + int& aArgRef) const {} + +} // namespace TestNsRefPtr + +using namespace TestNsRefPtr; + +TEST(nsRefPtr, AddRefAndRelease) +{ + Foo::total_constructions_ = 0; + Foo::total_destructions_ = 0; + + { + RefPtr<Foo> foop(do_QueryObject(new Foo)); + ASSERT_EQ(Foo::total_constructions_, 1); + ASSERT_EQ(Foo::total_destructions_, 0); + ASSERT_EQ(foop->refcount_, 1); + + foop = do_QueryObject(new Foo); + ASSERT_EQ(Foo::total_constructions_, 2); + ASSERT_EQ(Foo::total_destructions_, 1); + + // [Shouldn't compile] Is it a compile time error to try to |AddRef| by + // hand? + // foop->AddRef(); + + // [Shouldn't compile] Is it a compile time error to try to |Release| be + // hand? + // foop->Release(); + + // [Shouldn't compile] Is it a compile time error to try to |delete| an + // |nsCOMPtr|? + // delete foop; + + static_cast<Foo*>(foop)->AddRef(); + ASSERT_EQ(foop->refcount_, 2); + + static_cast<Foo*>(foop)->Release(); + ASSERT_EQ(foop->refcount_, 1); + } + + ASSERT_EQ(Foo::total_destructions_, 2); + + { + RefPtr<Foo> fooP(do_QueryObject(new Foo)); + ASSERT_EQ(Foo::total_constructions_, 3); + ASSERT_EQ(Foo::total_destructions_, 2); + ASSERT_EQ(fooP->refcount_, 1); + + Foo::total_addrefs_ = 0; + RefPtr<Foo> fooP2 = std::move(fooP); + mozilla::Unused << fooP2; + ASSERT_EQ(Foo::total_addrefs_, 0); + } +} + +TEST(nsRefPtr, VirtualDestructor) +{ + Bar::total_destructions_ = 0; + + { + RefPtr<Foo> foop(do_QueryObject(new Bar)); + mozilla::Unused << foop; + } + + ASSERT_EQ(Bar::total_destructions_, 1); +} + +TEST(nsRefPtr, Equality) +{ + Foo::total_constructions_ = 0; + Foo::total_destructions_ = 0; + + { + RefPtr<Foo> foo1p(do_QueryObject(new Foo)); + RefPtr<Foo> foo2p(do_QueryObject(new Foo)); + + ASSERT_EQ(Foo::total_constructions_, 2); + ASSERT_EQ(Foo::total_destructions_, 0); + + ASSERT_NE(foo1p, foo2p); + + ASSERT_NE(foo1p, nullptr); + ASSERT_NE(nullptr, foo1p); + ASSERT_FALSE(foo1p == nullptr); + ASSERT_FALSE(nullptr == foo1p); + + ASSERT_NE(foo1p, foo2p.get()); + + foo1p = foo2p; + + ASSERT_EQ(Foo::total_constructions_, 2); + ASSERT_EQ(Foo::total_destructions_, 1); + ASSERT_EQ(foo1p, foo2p); + + ASSERT_EQ(foo2p, foo2p.get()); + + ASSERT_EQ(RefPtr<Foo>(foo2p.get()), foo2p); + + ASSERT_TRUE(foo1p); + } + + ASSERT_EQ(Foo::total_constructions_, 2); + ASSERT_EQ(Foo::total_destructions_, 2); +} + +TEST(nsRefPtr, AddRefHelpers) +{ + Foo::total_addrefs_ = 0; + + { + auto* raw_foo1p = new Foo; + raw_foo1p->AddRef(); + + auto* raw_foo2p = new Foo; + raw_foo2p->AddRef(); + + ASSERT_EQ(Foo::total_addrefs_, 2); + + RefPtr<Foo> foo1p(dont_AddRef(raw_foo1p)); + + ASSERT_EQ(Foo::total_addrefs_, 2); + + RefPtr<Foo> foo2p; + foo2p = dont_AddRef(raw_foo2p); + + ASSERT_EQ(Foo::total_addrefs_, 2); + } + + { + // Test that various assignment helpers compile. + RefPtr<Foo> foop; + CreateFoo(RefPtrGetterAddRefs<Foo>(foop)); + CreateFoo(getter_AddRefs(foop)); + set_a_Foo(address_of(foop)); + foop = return_a_Foo(); + } +} + +TEST(nsRefPtr, QueryInterface) +{ + Foo::total_queries_ = 0; + Bar::total_queries_ = 0; + + { + RefPtr<Foo> fooP; + fooP = do_QueryObject(new Foo); + ASSERT_EQ(Foo::total_queries_, 1); + } + + { + RefPtr<Foo> fooP; + fooP = do_QueryObject(new Foo); + ASSERT_EQ(Foo::total_queries_, 2); + + RefPtr<Foo> foo2P; + foo2P = fooP; + ASSERT_EQ(Foo::total_queries_, 2); + } + + { + RefPtr<Bar> barP(do_QueryObject(new Bar)); + ASSERT_EQ(Bar::total_queries_, 1); + + RefPtr<Foo> fooP(do_QueryObject(barP)); + ASSERT_TRUE(fooP); + ASSERT_EQ(Foo::total_queries_, 2); + ASSERT_EQ(Bar::total_queries_, 2); + } +} + +// ------------------------------------------------------------------------- +// TODO(ER): The following tests should be moved to MFBT. + +#define NS_INLINE_DECL_THREADSAFE_MUTABLE_REFCOUNTING(_class) \ + public: \ + NS_METHOD_(MozExternalRefCountType) AddRef(void) const { \ + MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(_class) \ + MOZ_RELEASE_ASSERT(int32_t(mRefCnt) >= 0, "illegal refcnt"); \ + nsrefcnt count = ++mRefCnt; \ + return (nsrefcnt)count; \ + } \ + NS_METHOD_(MozExternalRefCountType) Release(void) const { \ + MOZ_RELEASE_ASSERT(int32_t(mRefCnt) > 0, "dup release"); \ + nsrefcnt count = --mRefCnt; \ + if (count == 0) { \ + delete (this); \ + return 0; \ + } \ + return count; \ + } \ + \ + protected: \ + mutable ::mozilla::ThreadSafeAutoRefCnt mRefCnt; \ + \ + public: + +class ObjectForConstPtr { + private: + // Reference-counted classes cannot have public destructors. + ~ObjectForConstPtr() = default; + + public: + NS_INLINE_DECL_THREADSAFE_MUTABLE_REFCOUNTING(ObjectForConstPtr) + void ConstMemberFunction(int aArg1, int* aArgPtr, int& aArgRef) const {} +}; +#undef NS_INLINE_DECL_THREADSAFE_MUTABLE_REFCOUNTING + +namespace TestNsRefPtr { +static void AnFooPtrPtrContext(Foo**) {} +static void AVoidPtrPtrContext(void**) {} +} // namespace TestNsRefPtr + +TEST(nsRefPtr, RefPtrCompilationTests) +{ + { + RefPtr<Foo> fooP; + + AnFooPtrPtrContext(getter_AddRefs(fooP)); + AVoidPtrPtrContext(getter_AddRefs(fooP)); + } + + { + RefPtr<Foo> fooP(new Foo); + RefPtr<const Foo> constFooP = fooP; + constFooP->ConstMethod(); + + // [Shouldn't compile] Is it a compile time error to call a non-const method + // on an |RefPtr<const T>|? + // constFooP->NonconstMethod(); + + // [Shouldn't compile] Is it a compile time error to construct an |RefPtr<T> + // from an |RefPtr<const T>|? + // RefPtr<Foo> otherFooP(constFooP); + } + + { + RefPtr<Foo> foop = new Foo; + RefPtr<Foo> foop2 = new Bar; + RefPtr<const ObjectForConstPtr> foop3 = new ObjectForConstPtr; + int test = 1; + void (Foo::*fPtr)(int, int*, int&) = &Foo::MemberFunction; + void (Foo::*fVPtr)(int, int*, int&) = &Foo::VirtualMemberFunction; + void (Foo::*fVCPtr)(int, int*, int&) const = + &Foo::VirtualConstMemberFunction; + void (ObjectForConstPtr::*fCPtr2)(int, int*, int&) const = + &ObjectForConstPtr::ConstMemberFunction; + + (foop->*fPtr)(test, &test, test); + (foop2->*fVPtr)(test, &test, test); + (foop2->*fVCPtr)(test, &test, test); + (foop3->*fCPtr2)(test, &test, test); + } + + // Looks like everything ran. + ASSERT_TRUE(true); +} |