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//===- unittest/ADT/IntrusiveRefCntPtrTest.cpp ----------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/IntrusiveRefCntPtr.h"
#include "gtest/gtest.h"
namespace llvm {
namespace {
int NumInstances = 0;
template <template <typename> class Base>
struct SimpleRefCounted : Base<SimpleRefCounted<Base>> {
SimpleRefCounted() { ++NumInstances; }
SimpleRefCounted(const SimpleRefCounted &RHS) : Base<SimpleRefCounted>(RHS) {
++NumInstances;
}
~SimpleRefCounted() { --NumInstances; }
};
} // anonymous namespace
template <typename T> struct IntrusiveRefCntPtrTest : testing::Test {};
typedef ::testing::Types<SimpleRefCounted<RefCountedBase>,
SimpleRefCounted<ThreadSafeRefCountedBase>>
IntrusiveRefCntTypes;
TYPED_TEST_SUITE(IntrusiveRefCntPtrTest, IntrusiveRefCntTypes, );
TYPED_TEST(IntrusiveRefCntPtrTest, RefCountedBaseCopyDoesNotLeak) {
EXPECT_EQ(0, NumInstances);
{
TypeParam *S1 = new TypeParam;
IntrusiveRefCntPtr<TypeParam> R1 = S1;
TypeParam *S2 = new TypeParam(*S1);
IntrusiveRefCntPtr<TypeParam> R2 = S2;
EXPECT_EQ(2, NumInstances);
}
EXPECT_EQ(0, NumInstances);
}
TYPED_TEST(IntrusiveRefCntPtrTest, InteropsWithUniquePtr) {
EXPECT_EQ(0, NumInstances);
{
auto S1 = std::make_unique<TypeParam>();
IntrusiveRefCntPtr<TypeParam> R1 = std::move(S1);
EXPECT_EQ(1, NumInstances);
EXPECT_EQ(S1, nullptr);
}
EXPECT_EQ(0, NumInstances);
}
TYPED_TEST(IntrusiveRefCntPtrTest, MakeIntrusiveRefCnt) {
EXPECT_EQ(0, NumInstances);
{
auto S1 = makeIntrusiveRefCnt<TypeParam>();
auto S2 = makeIntrusiveRefCnt<const TypeParam>();
EXPECT_EQ(2, NumInstances);
static_assert(
std::is_same<decltype(S1), IntrusiveRefCntPtr<TypeParam>>::value,
"Non-const type mismatch");
static_assert(
std::is_same<decltype(S2), IntrusiveRefCntPtr<const TypeParam>>::value,
"Const type mismatch");
}
EXPECT_EQ(0, NumInstances);
}
struct InterceptRefCounted : public RefCountedBase<InterceptRefCounted> {
InterceptRefCounted(bool *Released, bool *Retained)
: Released(Released), Retained(Retained) {}
bool * const Released;
bool * const Retained;
};
template <> struct IntrusiveRefCntPtrInfo<InterceptRefCounted> {
static void retain(InterceptRefCounted *I) {
*I->Retained = true;
I->Retain();
}
static void release(InterceptRefCounted *I) {
*I->Released = true;
I->Release();
}
};
TEST(IntrusiveRefCntPtr, UsesTraitsToRetainAndRelease) {
bool Released = false;
bool Retained = false;
{
InterceptRefCounted *I = new InterceptRefCounted(&Released, &Retained);
IntrusiveRefCntPtr<InterceptRefCounted> R = I;
}
EXPECT_TRUE(Released);
EXPECT_TRUE(Retained);
}
// Test that the generic constructors use SFINAE to disable invalid
// conversions.
struct X : RefCountedBase<X> {};
struct Y : X {};
struct Z : RefCountedBase<Z> {};
static_assert(!std::is_convertible<IntrusiveRefCntPtr<X> &&,
IntrusiveRefCntPtr<Y>>::value,
"X&& -> Y should be rejected with SFINAE");
static_assert(!std::is_convertible<const IntrusiveRefCntPtr<X> &,
IntrusiveRefCntPtr<Y>>::value,
"const X& -> Y should be rejected with SFINAE");
static_assert(
!std::is_convertible<std::unique_ptr<X>, IntrusiveRefCntPtr<Y>>::value,
"X -> Y should be rejected with SFINAE");
static_assert(!std::is_convertible<IntrusiveRefCntPtr<X> &&,
IntrusiveRefCntPtr<Z>>::value,
"X&& -> Z should be rejected with SFINAE");
static_assert(!std::is_convertible<const IntrusiveRefCntPtr<X> &,
IntrusiveRefCntPtr<Z>>::value,
"const X& -> Z should be rejected with SFINAE");
static_assert(
!std::is_convertible<std::unique_ptr<X>, IntrusiveRefCntPtr<Z>>::value,
"X -> Z should be rejected with SFINAE");
TEST(IntrusiveRefCntPtr, InteropsWithConvertible) {
// Check converting constructors and operator=.
auto Y1 = makeIntrusiveRefCnt<Y>();
auto Y2 = makeIntrusiveRefCnt<Y>();
auto Y3 = makeIntrusiveRefCnt<Y>();
auto Y4 = makeIntrusiveRefCnt<Y>();
const void *P1 = Y1.get();
const void *P2 = Y2.get();
const void *P3 = Y3.get();
const void *P4 = Y4.get();
IntrusiveRefCntPtr<X> X1 = std::move(Y1);
IntrusiveRefCntPtr<X> X2 = Y2;
IntrusiveRefCntPtr<X> X3;
IntrusiveRefCntPtr<X> X4;
X3 = std::move(Y3);
X4 = Y4;
EXPECT_EQ(P1, X1.get());
EXPECT_EQ(P2, X2.get());
EXPECT_EQ(P3, X3.get());
EXPECT_EQ(P4, X4.get());
}
} // end namespace llvm
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