tools/perf/util/include/linux/kernel.h

   1 #ifndef PERF_LINUX_KERNEL_H_
   2 #define PERF_LINUX_KERNEL_H_
   3
   4 #ifndef offsetof
   5 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
   6 #endif
   7
   8 #ifndef container_of
   9 /**
  10  * container_of - cast a member of a structure out to the containing structure
  11  * @ptr:        the pointer to the member.
  12  * @type:       the type of the container struct this is embedded in.
  13  * @member:     the name of the member within the struct.
  14  *
  15  */
  16 #define container_of(ptr, type, member) ({                      \
  17         const typeof(((type *)0)->member) * __mptr = (ptr);     \
  18         (type *)((char *)__mptr - offsetof(type, member)); })
  19 #endif
  20
  21 #ifndef max
  22 #define max(x, y) ({                            \
  23         typeof(x) _max1 = (x);                  \
  24         typeof(y) _max2 = (y);                  \
  25         (void) (&_max1 == &_max2);              \
  26         _max1 > _max2 ? _max1 : _max2; })
  27 #endif
  28
  29 #endif