gcc/testsuite/gcc.dg/compat/struct-align-2.h

   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 #define DESC_structmax "maximum useful struct alignment"
  15 struct epoll_event_structmax {
  16   unsigned int events;
  17   unsigned long long data;
  18 } __attribute__ ((aligned));
  19
  20
  21 #define DESC_struct4 "4-byte struct alignment"
  22 struct epoll_event_struct4 {
  23   unsigned int events;
  24   unsigned long long data;
  25 } __attribute__ ((aligned(4)));
  26
  27 #define DESC_struct8 "8-byte struct alignment"
  28 struct epoll_event_struct8 {
  29   unsigned int events;
  30   unsigned long long data;
  31 } __attribute__ ((aligned(8)));
  32
  33 #define DESC_data4 "4-byte alignment for data"
  34 struct epoll_event_data4 {
  35   unsigned int events;
  36   unsigned long long data __attribute__ ((aligned(4)));
  37 };
  38
  39 #define DESC_data8 "8-byte alignment for data"
  40 struct epoll_event_data8 {
  41   unsigned int events;
  42   unsigned long long data __attribute__ ((aligned(8)));
  43 };
  44
  45 #define DESC_p "packed attribute"
  46 struct epoll_event_p {
  47   unsigned int events;
  48   unsigned long long data;
  49 } __attribute__ ((packed));
  50
  51 #define DESC_pstruct4 "packed attribute, 4-byte struct alignment"
  52 struct epoll_event_pstruct4 {
  53   unsigned int events;
  54   unsigned long long data;
  55 } __attribute__ ((packed)) __attribute__ ((aligned(4)));
  56
  57 #define DESC_pstruct8 "packed attribute, 8-byte struct alignment"
  58 struct epoll_event_pstruct8 {
  59   unsigned int events;
  60   unsigned long long data;
  61 } __attribute__ ((packed)) __attribute__ ((aligned(8)));
  62
  63 #define DESC_pdata4 "packed attribute, 4-byte alignment for data"
  64 struct epoll_event_pdata4 {
  65   unsigned int events;
  66   unsigned long long data __attribute__ ((aligned(4)));
  67 } __attribute__ ((packed));
  68
  69 #define DESC_pdata8 "packed attribute, 8-byte alignment for data"
  70 struct epoll_event_pdata8 {
  71   unsigned int events;
  72   unsigned long long data __attribute__ ((aligned(8)));
  73 } __attribute__ ((packed));