ceph/src/include/err.h

   1 #ifndef CEPH_ERR_H
   2 #define CEPH_ERR_H
   3
   4 /*
   5  * adapted from linux 2.6.24 include/linux/err.h
   6  */
   7 #define MAX_ERRNO 4095
   8 #define IS_ERR_VALUE(x) ((x) >= (uintptr_t)-MAX_ERRNO)
   9
  10 #include <errno.h>
  11 #include <stdint.h>
  12 #include <stdbool.h>
  13
  14 /* this generates a warning in c++; caller can do the cast manually
  15 static inline void *ERR_PTR(long error)
  16 {
  17   return (void *) error;
  18 }
  19 */
  20
  21 static inline intptr_t PTR_ERR(const void *ptr)
  22 {
  23   return (intptr_t) ptr;
  24 }
  25
  26 static inline bool IS_ERR(const void *ptr)
  27 {
  28   return IS_ERR_VALUE((uintptr_t)ptr);
  29 }
  30
  31 #endif