lib/bug.h

   1 #ifndef _LTTNG_BUG_H
   2 #define _LTTNG_BUG_H
   3
   4 /*
   5  * lib/bug.h
   6  *
   7  * (C) Copyright 2010-2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   8  *
   9  * Dual LGPL v2.1/GPL v2 license.
  10  */
  11
  12 /**
  13  * BUILD_RUNTIME_BUG_ON - check condition at build (if constant) or runtime
  14  * @condition: the condition which should be false.
  15  *
  16  * If the condition is a constant and true, the compiler will generate a build
  17  * error. If the condition is not constant, a BUG will be triggered at runtime
  18  * if the condition is ever true. If the condition is constant and false, no
  19  * code is emitted.
  20  */
  21 #define BUILD_RUNTIME_BUG_ON(condition)                         \
  22         do {                                                    \
  23                 if (__builtin_constant_p(condition))            \
  24                         BUILD_BUG_ON(condition);                \
  25                 else                                            \
  26                         BUG_ON(condition);                      \
  27         } while (0)
  28
  29 #endif