include/babeltrace/compiler.h

   1 #ifndef _BABELTRACE_COMPILER_H
   2 #define _BABELTRACE_COMPILER_H
   3
   4 #include <stddef.h>     /* for offsetof */
   5
   6 #define MAYBE_BUILD_BUG_ON(cond) ((void)sizeof(char[1 - 2 * !!(cond)]))
   7
   8 #ifndef container_of
   9 #define container_of(ptr, type, member)                                 \
  10         ({                                                              \
  11                 const typeof(((type *)NULL)->member) * __ptr = (ptr);   \
  12                 (type *)((char *)__ptr - offsetof(type, member));       \
  13         })
  14 #endif
  15
  16 #endif /* _BABELTRACE_COMPILER_H */