[apple/xnu.git] / tests / intrusive_shared_ptr_src / ctor.move.cpp

//
// Tests for
//  template <typename U>
//  intrusive_shared_ptr(intrusive_shared_ptr<U, RefcountPolicy>&& other);
//
//  intrusive_shared_ptr(intrusive_shared_ptr&& other);
//

#include <libkern/c++/intrusive_shared_ptr.h>
#include <darwintest.h>
#include <darwintest_utils.h>
#include <type_traits>
#include <utility>
#include "test_policy.h"

struct Base { int i; };
struct Derived : Base { };

struct Base1 { int i; };
struct Base2 { long l; };
struct DerivedMultiple : Base1, Base2 {
	DerivedMultiple(int i) : Base1{i}, Base2{i + 10}
	{
	}
};

struct Unrelated { };

template <typename Stored, typename From, typename To>
static void
tests()
{
	Stored obj{3};

	// Test with non-null pointers
	{
		test_policy::retain_count = 0;
		libkern::intrusive_shared_ptr<From, test_policy> from(&obj, libkern::retain);
		CHECK(test_policy::retain_count == 1);
		CHECK(from.get() == &obj);

		libkern::intrusive_shared_ptr<To, test_policy> to(std::move(from)); // explicit
		CHECK(test_policy::retain_count == 1);
		CHECK(to.get() == &obj);
		CHECK(from.get() == nullptr);
	}
	{
		test_policy::retain_count = 0;
		libkern::intrusive_shared_ptr<From, test_policy> from(&obj, libkern::retain);
		CHECK(test_policy::retain_count == 1);
		CHECK(from.get() == &obj);

		libkern::intrusive_shared_ptr<To, test_policy> to{std::move(from)}; // explicit
		CHECK(test_policy::retain_count == 1);
		CHECK(to.get() == &obj);
		CHECK(from.get() == nullptr);
	}
	{
		test_policy::retain_count = 0;
		libkern::intrusive_shared_ptr<From, test_policy> from(&obj, libkern::retain);
		CHECK(test_policy::retain_count == 1);
		CHECK(from.get() == &obj);

		libkern::intrusive_shared_ptr<To, test_policy> to = std::move(from); // implicit
		CHECK(test_policy::retain_count == 1);
		CHECK(to.get() == &obj);
		CHECK(from.get() == nullptr);
	}

	// Test with a null pointer
	{
		test_policy::retain_count = 3;
		libkern::intrusive_shared_ptr<From, test_policy> from = nullptr;
		libkern::intrusive_shared_ptr<To, test_policy> to = std::move(from);
		CHECK(test_policy::retain_count == 3);
		CHECK(to.get() == nullptr);
		CHECK(from.get() == nullptr);
	}
}

T_DECL(ctor_move, "intrusive_shared_ptr.ctor.move") {
	tests</*stored*/ Derived, /*from*/ Derived, /*to*/ Derived>();
	tests</*stored*/ Derived, /*from*/ Derived, /*to*/ Derived const>();
	tests</*stored*/ Derived, /*from*/ Derived const, /*to*/ Derived const>();

	tests</*stored*/ Derived, /*from*/ Derived, /*to*/ Base>();
	tests</*stored*/ Derived, /*from*/ Derived, /*to*/ Base const>();
	tests</*stored*/ Derived, /*from*/ Derived const, /*to*/ Base const>();

	tests</*stored*/ DerivedMultiple, /*from*/ DerivedMultiple, /*to*/ Base1>();
	tests</*stored*/ DerivedMultiple, /*from*/ DerivedMultiple const, /*to*/ Base1 const>();

	tests</*stored*/ DerivedMultiple, /*from*/ DerivedMultiple, /*to*/ Base2>();
	tests</*stored*/ DerivedMultiple, /*from*/ DerivedMultiple const, /*to*/ Base2 const>();

	// Make sure basic trait querying works
	static_assert(std::is_move_constructible_v<test_shared_ptr<Derived> >);

	// Make sure downcasts are disabled
	static_assert(!std::is_constructible_v</*to*/ test_shared_ptr<Derived>, /*from*/ test_shared_ptr<Base>&&>);
	static_assert(!std::is_constructible_v</*to*/ test_shared_ptr<DerivedMultiple>, /*from*/ test_shared_ptr<Base1>&&>);
	static_assert(!std::is_constructible_v</*to*/ test_shared_ptr<DerivedMultiple>, /*from*/ test_shared_ptr<Base2>&&>);
	static_assert(!std::is_constructible_v</*to*/ test_shared_ptr<Base2>, /*from*/ test_shared_ptr<Base1>&&>);

	// Make sure const-casting away doesn't work
	static_assert(!std::is_constructible_v</*to*/ test_shared_ptr<Derived>, /*from*/ test_shared_ptr<Derived const>&&>);

	// Make sure casting to unrelated types doesn't work
	static_assert(!std::is_constructible_v</*to*/ test_shared_ptr<char>, /*from*/ test_shared_ptr<Derived>&&>);
	static_assert(!std::is_constructible_v</*to*/ test_shared_ptr<Unrelated>, /*from*/ test_shared_ptr<Derived>&&>);
	static_assert(!std::is_constructible_v</*to*/ test_shared_ptr<Base2>, /*from*/ test_shared_ptr<Base1>&&>);

	// Make sure constructing with different policies doesn't work
	static_assert(!std::is_constructible_v</*to*/ libkern::intrusive_shared_ptr<Derived, dummy_policy<2> >, /*from*/ libkern::intrusive_shared_ptr<Derived, dummy_policy<1> >&&>);
}
Commit	Line	Data
f427ee49 A	1	//
	2	// Tests for
	3	// template <typename U>
	4	// intrusive_shared_ptr(intrusive_shared_ptr<U, RefcountPolicy>&& other);
	5	//
	6	// intrusive_shared_ptr(intrusive_shared_ptr&& 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 <utility>
	14	#include "test_policy.h"
	15
	16	struct Base { int i; };
	17	struct Derived : Base { };
	18
	19	struct Base1 { int i; };
	20	struct Base2 { long l; };
	21	struct DerivedMultiple : Base1, Base2 {
	22	DerivedMultiple(int i) : Base1{i}, Base2{i + 10}
	23	{
	24	}
	25	};
	26
	27	struct Unrelated { };
	28
	29	template <typename Stored, typename From, typename To>
	30	static void
	31	tests()
	32	{
	33	Stored obj{3};
	34
	35	// Test with non-null pointers
	36	{
	37	test_policy::retain_count = 0;
	38	libkern::intrusive_shared_ptr<From, test_policy> from(&obj, libkern::retain);
	39	CHECK(test_policy::retain_count == 1);
	40	CHECK(from.get() == &obj);
	41
	42	libkern::intrusive_shared_ptr<To, test_policy> to(std::move(from)); // explicit
	43	CHECK(test_policy::retain_count == 1);
	44	CHECK(to.get() == &obj);
	45	CHECK(from.get() == nullptr);
	46	}
	47	{
	48	test_policy::retain_count = 0;
	49	libkern::intrusive_shared_ptr<From, test_policy> from(&obj, libkern::retain);
	50	CHECK(test_policy::retain_count == 1);
	51	CHECK(from.get() == &obj);
	52
	53	libkern::intrusive_shared_ptr<To, test_policy> to{std::move(from)}; // explicit
	54	CHECK(test_policy::retain_count == 1);
	55	CHECK(to.get() == &obj);
	56	CHECK(from.get() == nullptr);
	57	}
	58	{
	59	test_policy::retain_count = 0;
	60	libkern::intrusive_shared_ptr<From, test_policy> from(&obj, libkern::retain);
	61	CHECK(test_policy::retain_count == 1);
	62	CHECK(from.get() == &obj);
	63
	64	libkern::intrusive_shared_ptr<To, test_policy> to = std::move(from); // implicit
65	CHECK(test_policy::retain_count == 1);
66	CHECK(to.get() == &obj);
67	CHECK(from.get() == nullptr);
68	}
69
70	// Test with a null pointer
71	{
72	test_policy::retain_count = 3;
73	libkern::intrusive_shared_ptr<From, test_policy> from = nullptr;
74	libkern::intrusive_shared_ptr<To, test_policy> to = std::move(from);
75	CHECK(test_policy::retain_count == 3);
76	CHECK(to.get() == nullptr);
77	CHECK(from.get() == nullptr);
78	}
79	}
80
81	T_DECL(ctor_move, "intrusive_shared_ptr.ctor.move") {
82	tests</stored/ Derived, /from/ Derived, /to/ Derived>();
83	tests</stored/ Derived, /from/ Derived, /to/ Derived const>();
84	tests</stored/ Derived, /from/ Derived const, /to/ Derived const>();
85
86	tests</stored/ Derived, /from/ Derived, /to/ Base>();
87	tests</stored/ Derived, /from/ Derived, /to/ Base const>();
88	tests</stored/ Derived, /from/ Derived const, /to/ Base const>();
89
90	tests</stored/ DerivedMultiple, /from/ DerivedMultiple, /to/ Base1>();
91	tests</stored/ DerivedMultiple, /from/ DerivedMultiple const, /to/ Base1 const>();
92
93	tests</stored/ DerivedMultiple, /from/ DerivedMultiple, /to/ Base2>();
94	tests</stored/ DerivedMultiple, /from/ DerivedMultiple const, /to/ Base2 const>();
95
96	// Make sure basic trait querying works
97	static_assert(std::is_move_constructible_v<test_shared_ptr<Derived> >);
98
99	// Make sure downcasts are disabled
100	static_assert(!std::is_constructible_v</to/ test_shared_ptr<Derived>, /from/ test_shared_ptr<Base>&&>);
101	static_assert(!std::is_constructible_v</to/ test_shared_ptr<DerivedMultiple>, /from/ test_shared_ptr<Base1>&&>);
102	static_assert(!std::is_constructible_v</to/ test_shared_ptr<DerivedMultiple>, /from/ test_shared_ptr<Base2>&&>);
103	static_assert(!std::is_constructible_v</to/ test_shared_ptr<Base2>, /from/ test_shared_ptr<Base1>&&>);
104
105	// Make sure const-casting away doesn't work
106	static_assert(!std::is_constructible_v</to/ test_shared_ptr<Derived>, /from/ test_shared_ptr<Derived const>&&>);
107
108	// Make sure casting to unrelated types doesn't work
109	static_assert(!std::is_constructible_v</to/ test_shared_ptr<char>, /from/ test_shared_ptr<Derived>&&>);
110	static_assert(!std::is_constructible_v</to/ test_shared_ptr<Unrelated>, /from/ test_shared_ptr<Derived>&&>);
111	static_assert(!std::is_constructible_v</to/ test_shared_ptr<Base2>, /from/ test_shared_ptr<Base1>&&>);
112
113	// Make sure constructing with different policies doesn't work
114	static_assert(!std::is_constructible_v</to/ libkern::intrusive_shared_ptr<Derived, dummy_policy<2> >, /from/ libkern::intrusive_shared_ptr<Derived, dummy_policy<1> >&&>);
115	}