[lttng-tools.git] / src / common / bug.h

#ifndef _LTTNG_BUG_H
#define _LTTNG_BUG_H

/*
 * lttng/bug.h
 *
 * (C) Copyright 2010-2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 */

#include <urcu/compiler.h>
#include <stdio.h>
#include <stdlib.h>

#define LTTNG_BUG_ON(condition)						\
	do {								\
		if (caa_unlikely(condition)) {				\
			fprintf(stderr,					\
				"LTTng BUG in file %s, line %d.\n",	\
				__FILE__, __LINE__);			\
			exit(EXIT_FAILURE);				\
		}							\
	} while (0)

#define LTTNG_BUILD_BUG_ON(condition)					\
	((void) sizeof(char[-!!(condition)]))

/**
 * LTTNG_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 LTTNG_BUILD_RUNTIME_BUG_ON(condition)			\
	do {							\
		if (__builtin_constant_p(condition))		\
			LTTNG_BUILD_BUG_ON(condition);		\
		else						\
			LTTNG_BUG_ON(condition);		\
	} while (0)

#endif
Commit	Line	Data
	1	#ifndef _LTTNG_BUG_H
	2	#define _LTTNG_BUG_H
	3
	4	/*
	5	* lttng/bug.h
	6	*
	7	* (C) Copyright 2010-2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	8	*
	9	* Permission is hereby granted, free of charge, to any person obtaining a copy
	10	* of this software and associated documentation files (the "Software"), to deal
	11	* in the Software without restriction, including without limitation the rights
	12	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	13	* copies of the Software, and to permit persons to whom the Software is
	14	* furnished to do so, subject to the following conditions:
	15	*
	16	* The above copyright notice and this permission notice shall be included in
	17	* all copies or substantial portions of the Software.
	18	*/
	19
	20	#include <urcu/compiler.h>
	21	#include <stdio.h>
	22	#include <stdlib.h>
	23
	24	#define LTTNG_BUG_ON(condition) \
	25	do { \
	26	if (caa_unlikely(condition)) { \
	27	fprintf(stderr, \
	28	"LTTng BUG in file %s, line %d.\n", \
	29	__FILE__, __LINE__); \
	30	exit(EXIT_FAILURE); \
	31	} \
	32	} while (0)
	33
	34	#define LTTNG_BUILD_BUG_ON(condition) \
	35	((void) sizeof(char[-!!(condition)]))
	36
	37	/**
	38	* LTTNG_BUILD_RUNTIME_BUG_ON - check condition at build (if constant) or runtime
	39	* @condition: the condition which should be false.
	40	*
	41	* If the condition is a constant and true, the compiler will generate a build
	42	* error. If the condition is not constant, a BUG will be triggered at runtime
	43	* if the condition is ever true. If the condition is constant and false, no
	44	* code is emitted.
	45	*/
	46	#define LTTNG_BUILD_RUNTIME_BUG_ON(condition) \
	47	do { \
	48	if (__builtin_constant_p(condition)) \
	49	LTTNG_BUILD_BUG_ON(condition); \
	50	else \
	51	LTTNG_BUG_ON(condition); \
	52	} while (0)
	53
	54	#endif