Import CStringView from the Babeltrace tree

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

/*
 * Copyright (C) 2010-2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * SPDX-License-Identifier: MIT
 *
 */

#ifndef _LTTNG_BUG_H
#define _LTTNG_BUG_H

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