1 //
2 // Tests for
3 // template <typename U>
4 // intrusive_shared_ptr(intrusive_shared_ptr<U, RefcountPolicy> const& other);
5 //
6 // intrusive_shared_ptr(intrusive_shared_ptr const& other);
7 //
8
9 #include <libkern/c++/intrusive_shared_ptr.h>
10 #include <darwintest.h>
11 #include <darwintest_utils.h>
12 #include <type_traits>
13 #include "test_policy.h"
14
15 struct Base { int i; };
16 struct Derived : Base { };
17
18 struct Base1 { int i; };
19 struct Base2 { long l; };
20 struct DerivedMultiple : Base1, Base2 {
DerivedMultipleDerivedMultiple21 DerivedMultiple(int i) : Base1{i}, Base2{i + 10}
22 {
23 }
24 };
25
26 struct Unrelated { };
27
28 template <typename Stored, typename From, typename To>
29 static void
tests()30 tests()
31 {
32 Stored obj{3};
33
34 // Test with non-null pointers
35 {
36 test_policy::retain_count = 0;
37 libkern::intrusive_shared_ptr<From, test_policy> const from(&obj, libkern::retain);
38 libkern::intrusive_shared_ptr<To, test_policy> to(from); // explicit
39 CHECK(test_policy::retain_count == 2);
40 CHECK(to.get() == &obj);
41 }
42 {
43 test_policy::retain_count = 0;
44 libkern::intrusive_shared_ptr<From, test_policy> const from(&obj, libkern::retain);
45 libkern::intrusive_shared_ptr<To, test_policy> to{from}; // explicit
46 CHECK(test_policy::retain_count == 2);
47 CHECK(to.get() == &obj);
48 }
49 {
50 test_policy::retain_count = 0;
51 libkern::intrusive_shared_ptr<From, test_policy> const from(&obj, libkern::retain);
52 libkern::intrusive_shared_ptr<To, test_policy> to = from; // implicit
53 CHECK(test_policy::retain_count == 2);
54 CHECK(to.get() == &obj);
55 }
56
57 // Test with a null pointer
58 {
59 test_policy::retain_count = 0;
60 libkern::intrusive_shared_ptr<From, test_policy> const from = nullptr;
61 libkern::intrusive_shared_ptr<To, test_policy> to = from;
62 CHECK(test_policy::retain_count == 0);
63 CHECK(to.get() == nullptr);
64 }
65 }
66
67 T_DECL(ctor_copy, "intrusive_shared_ptr.ctor.copy", T_META_TAG_VM_PREFERRED) {
68 tests</*stored*/ Derived, /*from*/ Derived, /*to*/ Derived>();
69 tests</*stored*/ Derived, /*from*/ Derived, /*to*/ Derived const>();
70 tests</*stored*/ Derived, /*from*/ Derived const, /*to*/ Derived const>();
71
72 tests</*stored*/ Derived, /*from*/ Derived, /*to*/ Base>();
73 tests</*stored*/ Derived, /*from*/ Derived, /*to*/ Base const>();
74 tests</*stored*/ Derived, /*from*/ Derived const, /*to*/ Base const>();
75
76 tests</*stored*/ DerivedMultiple, /*from*/ DerivedMultiple, /*to*/ Base1>();
77 tests</*stored*/ DerivedMultiple, /*from*/ DerivedMultiple const, /*to*/ Base1 const>();
78
79 tests</*stored*/ DerivedMultiple, /*from*/ DerivedMultiple, /*to*/ Base2>();
80 tests</*stored*/ DerivedMultiple, /*from*/ DerivedMultiple const, /*to*/ Base2 const>();
81
82 // Make sure basic trait querying works
83 static_assert(std::is_copy_constructible_v<test_shared_ptr<Derived> >);
84
85 // Make sure downcasts are disabled
86 static_assert(!std::is_constructible_v</*to*/ test_shared_ptr<Derived>, /*from*/ test_shared_ptr<Base> const&>);
87 static_assert(!std::is_constructible_v</*to*/ test_shared_ptr<DerivedMultiple>, /*from*/ test_shared_ptr<Base1> const&>);
88 static_assert(!std::is_constructible_v</*to*/ test_shared_ptr<DerivedMultiple>, /*from*/ test_shared_ptr<Base2> const&>);
89 static_assert(!std::is_constructible_v</*to*/ test_shared_ptr<Base2>, /*from*/ test_shared_ptr<Base1> const&>);
90
91 // Make sure const-casting away doesn't work
92 static_assert(!std::is_constructible_v</*to*/ test_shared_ptr<Derived>, /*from*/ test_shared_ptr<Derived const> const&>);
93
94 // Make sure casting to unrelated types doesn't work
95 static_assert(!std::is_constructible_v</*to*/ test_shared_ptr<char>, /*from*/ test_shared_ptr<Derived> const&>);
96 static_assert(!std::is_constructible_v</*to*/ test_shared_ptr<Unrelated>, /*from*/ test_shared_ptr<Derived> const&>);
97 static_assert(!std::is_constructible_v</*to*/ test_shared_ptr<Base2>, /*from*/ test_shared_ptr<Base1> const&>);
98
99 // Make sure constructing with different policies doesn't work
100 static_assert(!std::is_constructible_v</*to*/ libkern::intrusive_shared_ptr<Derived, dummy_policy<2> >, /*from*/ libkern::intrusive_shared_ptr<Derived, dummy_policy<1> > const &>);
101 }
102