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 #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