1 /* Define several variants of struct epoll_event from the Linux kernel,
2    specifying various attributes that affect alignment and size.
3 
4    This test was developed for systems for which int is 32 bits and
5    long long is 64 bits; it might need to be disabled for systems where
6    either of those is not true.  */
7 
8 #define DESC_orig "original"
9 struct epoll_event_orig {
10   unsigned int events;
11   unsigned long long data;
12 };
13 
14 #ifndef SKIP_ATTRIBUTE
15 #define DESC_structmax "maximum useful struct alignment"
16 struct epoll_event_structmax {
17   unsigned int events;
18   unsigned long long data;
19 } __attribute__ ((aligned));
20 
21 
22 #define DESC_struct4 "4-byte struct alignment"
23 struct epoll_event_struct4 {
24   unsigned int events;
25   unsigned long long data;
26 } __attribute__ ((aligned(4)));
27 
28 #define DESC_struct8 "8-byte struct alignment"
29 struct epoll_event_struct8 {
30   unsigned int events;
31   unsigned long long data;
32 } __attribute__ ((aligned(8)));
33 
34 #define DESC_data4 "4-byte alignment for data"
35 struct epoll_event_data4 {
36   unsigned int events;
37   unsigned long long data __attribute__ ((aligned(4)));
38 };
39 
40 #define DESC_data8 "8-byte alignment for data"
41 struct epoll_event_data8 {
42   unsigned int events;
43   unsigned long long data __attribute__ ((aligned(8)));
44 };
45 
46 #define DESC_p "packed attribute"
47 struct epoll_event_p {
48   unsigned int events;
49   unsigned long long data;
50 } __attribute__ ((packed));
51 
52 #define DESC_pstruct4 "packed attribute, 4-byte struct alignment"
53 struct epoll_event_pstruct4 {
54   unsigned int events;
55   unsigned long long data;
56 } __attribute__ ((packed)) __attribute__ ((aligned(4)));
57 
58 #define DESC_pstruct8 "packed attribute, 8-byte struct alignment"
59 struct epoll_event_pstruct8 {
60   unsigned int events;
61   unsigned long long data;
62 } __attribute__ ((packed)) __attribute__ ((aligned(8)));
63 
64 #define DESC_pdata4 "packed attribute, 4-byte alignment for data"
65 struct epoll_event_pdata4 {
66   unsigned int events;
67   unsigned long long data __attribute__ ((aligned(4)));
68 } __attribute__ ((packed));
69 
70 #define DESC_pdata8 "packed attribute, 8-byte alignment for data"
71 struct epoll_event_pdata8 {
72   unsigned int events;
73   unsigned long long data __attribute__ ((aligned(8)));
74 } __attribute__ ((packed));
75 #endif
76