tools/virtio/linux/err.h

   1 #ifndef ERR_H
   2 #define ERR_H
   3 #define MAX_ERRNO       4095
   4
   5 #define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
   6
   7 static inline void * __must_check ERR_PTR(long error)
   8 {
   9         return (void *) error;
  10 }
  11
  12 static inline long __must_check PTR_ERR(const void *ptr)
  13 {
  14         return (long) ptr;
  15 }
  16
  17 static inline long __must_check IS_ERR(const void *ptr)
  18 {
  19         return IS_ERR_VALUE((unsigned long)ptr);
  20 }
  21
  22 static inline long __must_check IS_ERR_OR_NULL(const void *ptr)
  23 {
  24         return !ptr || IS_ERR_VALUE((unsigned long)ptr);
  25 }
  26 #endif /* ERR_H */