projects / lttng-modules.git / blame
| Commit | Line | Data |
|---|---|---|
| 9f36eaed MJ |
1 | /* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) |
| 2 | * | |
| 58c78202 MD |
3 | * lib/bug.h |
| 4 | * | |
| 886d51a3 | 5 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 58c78202 MD |
6 | */ |
| 7 | ||
| 9f36eaed MJ |
8 | #ifndef _LTTNG_BUG_H |
| 9 | #define _LTTNG_BUG_H | |
| 10 | ||
| 20cac830 MJ |
11 | #include <linux/version.h> |
| 12 | ||
| 13 | #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38)) | |
| 14 | #define LTTNG_BUILD_BUG_ON(cond) BUILD_BUG_ON(cond) | |
| 15 | #else | |
| 16 | #define LTTNG_BUILD_BUG_ON(cond) MAYBE_BUILD_BUG_ON(cond) | |
| 17 | #endif | |
| 18 | ||
| 58c78202 MD |
19 | /** |
| 20 | * BUILD_RUNTIME_BUG_ON - check condition at build (if constant) or runtime | |
| 21 | * @condition: the condition which should be false. | |
| 22 | * | |
| 23 | * If the condition is a constant and true, the compiler will generate a build | |
| 24 | * error. If the condition is not constant, a BUG will be triggered at runtime | |
| 25 | * if the condition is ever true. If the condition is constant and false, no | |
| 26 | * code is emitted. | |
| 27 | */ | |
| 28 | #define BUILD_RUNTIME_BUG_ON(condition) \ | |
| 29 | do { \ | |
| 30 | if (__builtin_constant_p(condition)) \ | |
| 20cac830 | 31 | LTTNG_BUILD_BUG_ON(condition); \ |
| 58c78202 MD |
32 | else \ |
| 33 | BUG_ON(condition); \ | |
| 34 | } while (0) | |
| 35 | ||
| 36 | #endif |