root/tools/virtio/linux/err.h

INCLUDED FROM

DEFINITIONS

1. ERR_PTR
2. PTR_ERR
3. IS_ERR
4. IS_ERR_OR_NULL

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef ERR_H
   3 #define ERR_H
   4 #define MAX_ERRNO       4095
   5 
   6 #define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
   7 
   8 static inline void * __must_check ERR_PTR(long error)
   9 {
  10         return (void *) error;
  11 }
  12 
  13 static inline long __must_check PTR_ERR(const void *ptr)
  14 {
  15         return (long) ptr;
  16 }
  17 
  18 static inline long __must_check IS_ERR(const void *ptr)
  19 {
  20         return IS_ERR_VALUE((unsigned long)ptr);
  21 }
  22 
  23 static inline long __must_check IS_ERR_OR_NULL(const void *ptr)
  24 {
  25         return !ptr || IS_ERR_VALUE((unsigned long)ptr);
  26 }
  27 #endif /* ERR_H */