From mboxrd@z Thu Jan 1 00:00:00 1970 From: mathieu.desnoyers@efficios.com (Mathieu Desnoyers) Date: Sat, 26 Nov 2011 10:03:28 -0500 Subject: [lttng-dev] [PATCH 03/19] lttng: BUILD_RUNTIME_BUG_ON In-Reply-To: <1322319824-6529-3-git-send-email-mathieu.desnoyers@efficios.com> References: <1322319824-6529-1-git-send-email-mathieu.desnoyers@efficios.com> <1322319824-6529-2-git-send-email-mathieu.desnoyers@efficios.com> <1322319824-6529-3-git-send-email-mathieu.desnoyers@efficios.com> Message-ID: <1322319824-6529-4-git-send-email-mathieu.desnoyers@efficios.com> Signed-off-by: Mathieu Desnoyers --- drivers/staging/lttng/lib/bug.h | 29 +++++++++++++++++++++++++++++ 1 files changed, 29 insertions(+), 0 deletions(-) create mode 100644 drivers/staging/lttng/lib/bug.h diff --git a/drivers/staging/lttng/lib/bug.h b/drivers/staging/lttng/lib/bug.h new file mode 100644 index 0000000..8243cc9 --- /dev/null +++ b/drivers/staging/lttng/lib/bug.h @@ -0,0 +1,29 @@ +#ifndef _LTTNG_BUG_H +#define _LTTNG_BUG_H + +/* + * lib/bug.h + * + * (C) Copyright 2010-2011 - Mathieu Desnoyers + * + * Dual LGPL v2.1/GPL v2 license. + */ + +/** + * BUILD_RUNTIME_BUG_ON - check condition at build (if constant) or runtime + * @condition: the condition which should be false. + * + * If the condition is a constant and true, the compiler will generate a build + * error. If the condition is not constant, a BUG will be triggered at runtime + * if the condition is ever true. If the condition is constant and false, no + * code is emitted. + */ +#define BUILD_RUNTIME_BUG_ON(condition) \ + do { \ + if (__builtin_constant_p(condition)) \ + BUILD_BUG_ON(condition); \ + else \ + BUG_ON(condition); \ + } while (0) + +#endif -- 1.7.2.5