lib/bug.h

   1 /* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
   2  *
   3  * lib/bug.h
   4  *
   5  * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   6  */
   7
   8 #ifndef _LTTNG_BUG_H
   9 #define _LTTNG_BUG_H
  10
  11 /**
  12  * BUILD_RUNTIME_BUG_ON - check condition at build (if constant) or runtime
  13  * @condition: the condition which should be false.
  14  *
  15  * If the condition is a constant and true, the compiler will generate a build
  16  * error. If the condition is not constant, a BUG will be triggered at runtime
  17  * if the condition is ever true. If the condition is constant and false, no
  18  * code is emitted.
  19  */
  20 #define BUILD_RUNTIME_BUG_ON(condition)                         \
  21         do {                                                    \
  22                 if (__builtin_constant_p(condition))            \
  23                         BUILD_BUG_ON(condition);                \
  24                 else                                            \
  25                         BUG_ON(condition);                      \
  26         } while (0)
  27
  28 #endif