| 1 | /* |
| 2 | * SPDX-License-Identifier: LGPL-2.1-only |
| 3 | * |
| 4 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 5 | */ |
| 6 | |
| 7 | #ifndef _UST_COMMON_ERR_PTR_H |
| 8 | #define _UST_COMMON_ERR_PTR_H |
| 9 | |
| 10 | #include <urcu/compiler.h> |
| 11 | #include <unistd.h> |
| 12 | |
| 13 | #define MAX_ERRNO 4095 |
| 14 | |
| 15 | static inline |
| 16 | int IS_ERR_VALUE(long value) |
| 17 | { |
| 18 | if (caa_unlikely((unsigned long) value >= (unsigned long) -MAX_ERRNO)) |
| 19 | return 1; |
| 20 | else |
| 21 | return 0; |
| 22 | } |
| 23 | |
| 24 | static inline |
| 25 | void *ERR_PTR(long error) |
| 26 | { |
| 27 | return (void *) error; |
| 28 | } |
| 29 | |
| 30 | static inline |
| 31 | long PTR_ERR(const void *ptr) |
| 32 | { |
| 33 | return (long) ptr; |
| 34 | } |
| 35 | |
| 36 | static inline |
| 37 | int IS_ERR(const void *ptr) |
| 38 | { |
| 39 | return IS_ERR_VALUE((long) ptr); |
| 40 | } |
| 41 | |
| 42 | #endif /* _UST_COMMON_ERR_PTR_H */ |