xref: /xnu-8020.140.41/tests/intrusive_shared_ptr_src/abi.size_alignment.cpp (revision 27b03b360a988dfd3dfdf34262bb0042026747cc) ! 
1*27b03b36SApple OSS Distributions //
2*27b03b36SApple OSS Distributions // This tests that the alignment and size of a class are the same whether
3*27b03b36SApple OSS Distributions // they have a `T*` or a shared pointer data member.
4*27b03b36SApple OSS Distributions //
5*27b03b36SApple OSS Distributions 
6*27b03b36SApple OSS Distributions #include <libkern/c++/intrusive_shared_ptr.h>
7*27b03b36SApple OSS Distributions #include "test_policy.h"
8*27b03b36SApple OSS Distributions #include <cstddef>
9*27b03b36SApple OSS Distributions #include <darwintest.h>
10*27b03b36SApple OSS Distributions 
11*27b03b36SApple OSS Distributions 
12*27b03b36SApple OSS Distributions namespace ns1 {
13*27b03b36SApple OSS Distributions struct FooShared {
14*27b03b36SApple OSS Distributions 	test_shared_ptr<int> ptr;
15*27b03b36SApple OSS Distributions };
16*27b03b36SApple OSS Distributions 
17*27b03b36SApple OSS Distributions struct FooRaw {
18*27b03b36SApple OSS Distributions 	int* ptr;
19*27b03b36SApple OSS Distributions };
20*27b03b36SApple OSS Distributions 
21*27b03b36SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
22*27b03b36SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
23*27b03b36SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
24*27b03b36SApple OSS Distributions }
25*27b03b36SApple OSS Distributions 
26*27b03b36SApple OSS Distributions namespace ns2 {
27*27b03b36SApple OSS Distributions struct FooShared {
28*27b03b36SApple OSS Distributions 	int i;
29*27b03b36SApple OSS Distributions 	test_shared_ptr<int> ptr;
30*27b03b36SApple OSS Distributions };
31*27b03b36SApple OSS Distributions 
32*27b03b36SApple OSS Distributions struct FooRaw {
33*27b03b36SApple OSS Distributions 	int i;
34*27b03b36SApple OSS Distributions 	int* ptr;
35*27b03b36SApple OSS Distributions };
36*27b03b36SApple OSS Distributions 
37*27b03b36SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
38*27b03b36SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
39*27b03b36SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
40*27b03b36SApple OSS Distributions }
41*27b03b36SApple OSS Distributions 
42*27b03b36SApple OSS Distributions namespace ns3 {
43*27b03b36SApple OSS Distributions struct FooShared {
44*27b03b36SApple OSS Distributions 	char c;
45*27b03b36SApple OSS Distributions 	test_shared_ptr<int> ptr;
46*27b03b36SApple OSS Distributions 	int i;
47*27b03b36SApple OSS Distributions };
48*27b03b36SApple OSS Distributions 
49*27b03b36SApple OSS Distributions struct FooRaw {
50*27b03b36SApple OSS Distributions 	char c;
51*27b03b36SApple OSS Distributions 	int* ptr;
52*27b03b36SApple OSS Distributions 	int i;
53*27b03b36SApple OSS Distributions };
54*27b03b36SApple OSS Distributions 
55*27b03b36SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
56*27b03b36SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
57*27b03b36SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
58*27b03b36SApple OSS Distributions }
59*27b03b36SApple OSS Distributions 
60*27b03b36SApple OSS Distributions namespace ns4 {
61*27b03b36SApple OSS Distributions struct FooShared {
62*27b03b36SApple OSS Distributions 	char c;
63*27b03b36SApple OSS Distributions 	unsigned int b : 5;
64*27b03b36SApple OSS Distributions 	test_shared_ptr<int> ptr;
65*27b03b36SApple OSS Distributions 	int i;
66*27b03b36SApple OSS Distributions };
67*27b03b36SApple OSS Distributions 
68*27b03b36SApple OSS Distributions struct FooRaw {
69*27b03b36SApple OSS Distributions 	char c;
70*27b03b36SApple OSS Distributions 	unsigned int b : 5;
71*27b03b36SApple OSS Distributions 	int* ptr;
72*27b03b36SApple OSS Distributions 	int i;
73*27b03b36SApple OSS Distributions };
74*27b03b36SApple OSS Distributions 
75*27b03b36SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
76*27b03b36SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
77*27b03b36SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
78*27b03b36SApple OSS Distributions }
79*27b03b36SApple OSS Distributions 
80*27b03b36SApple OSS Distributions namespace ns5 {
81*27b03b36SApple OSS Distributions struct __attribute__((packed)) FooShared {
82*27b03b36SApple OSS Distributions 	char c;
83*27b03b36SApple OSS Distributions 	unsigned int b : 5;
84*27b03b36SApple OSS Distributions 	test_shared_ptr<int> ptr;
85*27b03b36SApple OSS Distributions 	int i;
86*27b03b36SApple OSS Distributions };
87*27b03b36SApple OSS Distributions 
88*27b03b36SApple OSS Distributions struct __attribute__((packed)) FooRaw {
89*27b03b36SApple OSS Distributions 	char c;
90*27b03b36SApple OSS Distributions 	unsigned int b : 5;
91*27b03b36SApple OSS Distributions 	int* ptr;
92*27b03b36SApple OSS Distributions 	int i;
93*27b03b36SApple OSS Distributions };
94*27b03b36SApple OSS Distributions 
95*27b03b36SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
96*27b03b36SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
97*27b03b36SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
98*27b03b36SApple OSS Distributions }
99*27b03b36SApple OSS Distributions 
100*27b03b36SApple OSS Distributions namespace ns6 {
101*27b03b36SApple OSS Distributions struct FooShared {
102*27b03b36SApple OSS Distributions 	char c;
103*27b03b36SApple OSS Distributions 	unsigned int b : 5;
104*27b03b36SApple OSS Distributions 	test_shared_ptr<int> ptr;
105*27b03b36SApple OSS Distributions 	int i __attribute__((packed));
106*27b03b36SApple OSS Distributions };
107*27b03b36SApple OSS Distributions 
108*27b03b36SApple OSS Distributions struct FooRaw {
109*27b03b36SApple OSS Distributions 	char c;
110*27b03b36SApple OSS Distributions 	unsigned int b : 5;
111*27b03b36SApple OSS Distributions 	int* ptr;
112*27b03b36SApple OSS Distributions 	int i __attribute__((packed));
113*27b03b36SApple OSS Distributions };
114*27b03b36SApple OSS Distributions 
115*27b03b36SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
116*27b03b36SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
117*27b03b36SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
118*27b03b36SApple OSS Distributions }
119*27b03b36SApple OSS Distributions 
120*27b03b36SApple OSS Distributions namespace ns7 {
121*27b03b36SApple OSS Distributions struct FooShared {
122*27b03b36SApple OSS Distributions 	char c;
123*27b03b36SApple OSS Distributions 	unsigned int b : 5;
124*27b03b36SApple OSS Distributions 	test_shared_ptr<int> ptr __attribute__((packed));
125*27b03b36SApple OSS Distributions 	int i;
126*27b03b36SApple OSS Distributions };
127*27b03b36SApple OSS Distributions 
128*27b03b36SApple OSS Distributions struct FooRaw {
129*27b03b36SApple OSS Distributions 	char c;
130*27b03b36SApple OSS Distributions 	unsigned int b : 5;
131*27b03b36SApple OSS Distributions 	int* ptr __attribute__((packed));
132*27b03b36SApple OSS Distributions 	int i;
133*27b03b36SApple OSS Distributions };
134*27b03b36SApple OSS Distributions 
135*27b03b36SApple OSS Distributions static_assert(sizeof(FooShared) == sizeof(FooRaw));
136*27b03b36SApple OSS Distributions static_assert(alignof(FooShared) == alignof(FooRaw));
137*27b03b36SApple OSS Distributions static_assert(offsetof(FooShared, ptr) == offsetof(FooRaw, ptr));
138*27b03b36SApple OSS Distributions }
139*27b03b36SApple OSS Distributions 
140*27b03b36SApple OSS Distributions T_DECL(abi_size_alignment, "intrusive_shared_ptr.abi.size_alignment") {
141*27b03b36SApple OSS Distributions 	T_PASS("intrusive_shared_ptr.abi.size_alignment compile-time tests passed");
142*27b03b36SApple OSS Distributions }
143