projects / lttng-ust.git / blame
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| 8f3f8c99 MD |
1 | #ifndef _LTTNG_ERROR_H |
| 2 | #define _LTTNG_ERROR_H | |
| 3 | ||
| 4 | /* | |
| 5 | * Copyright (c) 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
| 6 | * | |
| 7 | * This library is free software; you can redistribute it and/or | |
| 8 | * modify it under the terms of the GNU Lesser General Public | |
| 9 | * License as published by the Free Software Foundation; only | |
| 10 | * version 2.1 of the License. | |
| 11 | * | |
| 12 | * This library is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | * Lesser General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU Lesser General Public | |
| 18 | * License along with this library; if not, write to the Free Software | |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 20 | */ | |
| 21 | ||
| 22 | #include <urcu/compiler.h> | |
| 23 | #include <unistd.h> | |
| 24 | ||
| 25 | #define MAX_ERRNO 4095 | |
| 26 | ||
| 27 | static inline | |
| 28 | int IS_ERR_VALUE(long value) | |
| 29 | { | |
| 30 | if (caa_unlikely((unsigned long) value >= (unsigned long) -MAX_ERRNO)) | |
| 31 | return 1; | |
| 32 | else | |
| 33 | return 0; | |
| 34 | } | |
| 35 | ||
| 36 | static inline | |
| 37 | void *ERR_PTR(long error) | |
| 38 | { | |
| 39 | return (void *) error; | |
| 40 | } | |
| 41 | ||
| 42 | static inline | |
| 43 | long PTR_ERR(const void *ptr) | |
| 44 | { | |
| 45 | return (long) ptr; | |
| 46 | } | |
| 47 | ||
| 48 | static inline | |
| 49 | int IS_ERR(const void *ptr) | |
| 50 | { | |
| 51 | return IS_ERR_VALUE((long) ptr); | |
| 52 | } | |
| 53 | ||
| 54 | #endif /* _LTTNG_ERROR_H */ |