[lttng-modules.git] / lib / bug.h

/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
 *
 * lib/bug.h
 *
 * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 */

#ifndef _LTTNG_BUG_H
#define _LTTNG_BUG_H

/**
 * 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
Commit	Line	Data
	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