[mirror_zfs.git] / lib / libspl / include / assert.h

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include_next <assert.h>

#ifndef _LIBSPL_ASSERT_H
#define	_LIBSPL_ASSERT_H

#include <stdio.h>
#include <stdlib.h>

static inline int
libspl_assert(const char *buf, const char *file, const char *func, int line)
{
	fprintf(stderr, "%s\n", buf);
	fprintf(stderr, "ASSERT at %s:%d:%s()", file, line, func);
	abort();
}

#ifdef verify
#undef verify
#endif

#define	VERIFY(cond)							\
	(void) ((!(cond)) &&						\
	    libspl_assert(#cond, __FILE__, __FUNCTION__, __LINE__))
#define	verify(cond)							\
	(void) ((!(cond)) &&						\
	    libspl_assert(#cond, __FILE__, __FUNCTION__, __LINE__))

#define	VERIFY3_IMPL(LEFT, OP, RIGHT, TYPE)				\
do {									\
	const TYPE __left = (TYPE)(LEFT);				\
	const TYPE __right = (TYPE)(RIGHT);				\
	if (!(__left OP __right)) {					\
		char *__buf = alloca(256);				\
		(void) snprintf(__buf, 256,				\
		    "%s %s %s (0x%llx %s 0x%llx)", #LEFT, #OP, #RIGHT,	\
		    (u_longlong_t)__left, #OP, (u_longlong_t)__right);	\
		libspl_assert(__buf, __FILE__, __FUNCTION__, __LINE__);	\
	}								\
} while (0)

#define	VERIFY3S(x, y, z)	VERIFY3_IMPL(x, y, z, int64_t)
#define	VERIFY3U(x, y, z)	VERIFY3_IMPL(x, y, z, uint64_t)
#define	VERIFY3P(x, y, z)	VERIFY3_IMPL(x, y, z, uintptr_t)
#define	VERIFY0(x)		VERIFY3_IMPL(x, ==, 0, uint64_t)

#ifdef assert
#undef assert
#endif

/* Compile time assert */
#define	CTASSERT_GLOBAL(x)		_CTASSERT(x, __LINE__)
#define	CTASSERT(x)			{ _CTASSERT(x, __LINE__); }
#define	_CTASSERT(x, y)			__CTASSERT(x, y)
#define	__CTASSERT(x, y)						\
	typedef char __attribute__((unused))				\
	__compile_time_assertion__ ## y[(x) ? 1 : -1]

#ifdef NDEBUG
#define	ASSERT3S(x, y, z)	((void)0)
#define	ASSERT3U(x, y, z)	((void)0)
#define	ASSERT3P(x, y, z)	((void)0)
#define	ASSERT0(x)		((void)0)
#define	ASSERT(x)		((void)0)
#define	assert(x)		((void)0)
#define	ASSERTV(x)
#define	IMPLY(A, B)		((void)0)
#define	EQUIV(A, B)		((void)0)
#else
#define	ASSERT3S(x, y, z)	VERIFY3S(x, y, z)
#define	ASSERT3U(x, y, z)	VERIFY3U(x, y, z)
#define	ASSERT3P(x, y, z)	VERIFY3P(x, y, z)
#define	ASSERT0(x)		VERIFY0(x)
#define	ASSERT(x)		VERIFY(x)
#define	assert(x)		VERIFY(x)
#define	ASSERTV(x)		x
#define	IMPLY(A, B) \
	((void)(((!(A)) || (B)) || \
	    libspl_assert("(" #A ") implies (" #B ")", \
	    __FILE__, __FUNCTION__, __LINE__)))
#define	EQUIV(A, B) \
	((void)((!!(A) == !!(B)) || \
	    libspl_assert("(" #A ") is equivalent to (" #B ")", \
	    __FILE__, __FUNCTION__, __LINE__)))

#endif  /* NDEBUG */

#endif  /* _LIBSPL_ASSERT_H */
Commit	Line	Data
a26baf28 BB	1	/*
	2	* CDDL HEADER START
	3	*
	4	* The contents of this file are subject to the terms of the
	5	* Common Development and Distribution License, Version 1.0 only
	6	* (the "License"). You may not use this file except in compliance
	7	* with the License.
	8	*
	9	* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
	10	* or http://www.opensolaris.org/os/licensing.
	11	* See the License for the specific language governing permissions
	12	* and limitations under the License.
	13	*
	14	* When distributing Covered Code, include this CDDL HEADER in each
	15	* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
	16	* If applicable, add the following below this CDDL HEADER, with the
	17	* fields enclosed by brackets "[]" replaced with your own identifying
	18	* information: Portions Copyright [yyyy] [name of copyright owner]
	19	*
	20	* CDDL HEADER END
	21	*/
	22	/*
	23	* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
	24	* Use is subject to license terms.
	25	*/
	26
	27	#include_next <assert.h>
	28
	29	#ifndef _LIBSPL_ASSERT_H
d1d7e268	30	#define _LIBSPL_ASSERT_H
a26baf28 BB	31
	32	#include <stdio.h>
	33	#include <stdlib.h>
	34
726c4a25 BB	35	static inline int
726c4a25 BB	36	libspl_assert(const char buf, const char file, const char *func, int line)
a26baf28	37	{
726c4a25 BB	38	fprintf(stderr, "%s\n", buf);
726c4a25 BB	39	fprintf(stderr, "ASSERT at %s:%d:%s()", file, line, func);
a26baf28 BB	40	abort();
a26baf28 BB	41	}
a26baf28	42
726c4a25 BB	43	#ifdef verify
	44	#undef verify
	45	#endif
a26baf28	46
726c4a25 BB	47	#define VERIFY(cond) \
	48	(void) ((!(cond)) && \
	49	libspl_assert(#cond, __FILE__, __FUNCTION__, __LINE__))
	50	#define verify(cond) \
	51	(void) ((!(cond)) && \
	52	libspl_assert(#cond, __FILE__, __FUNCTION__, __LINE__))
a26baf28	53
726c4a25 BB	54	#define VERIFY3_IMPL(LEFT, OP, RIGHT, TYPE) \
	55	do { \
	56	const TYPE __left = (TYPE)(LEFT); \
	57	const TYPE __right = (TYPE)(RIGHT); \
	58	if (!(__left OP __right)) { \
	59	char *__buf = alloca(256); \
	60	(void) snprintf(__buf, 256, \
	61	"%s %s %s (0x%llx %s 0x%llx)", #LEFT, #OP, #RIGHT, \
	62	(u_longlong_t)__left, #OP, (u_longlong_t)__right); \
	63	libspl_assert(__buf, __FILE__, __FUNCTION__, __LINE__); \
	64	} \
a26baf28	65	} while (0)
a26baf28 BB	66
	67	#define VERIFY3S(x, y, z) VERIFY3_IMPL(x, y, z, int64_t)
	68	#define VERIFY3U(x, y, z) VERIFY3_IMPL(x, y, z, uint64_t)
	69	#define VERIFY3P(x, y, z) VERIFY3_IMPL(x, y, z, uintptr_t)
c99c9001	70	#define VERIFY0(x) VERIFY3_IMPL(x, ==, 0, uint64_t)
a26baf28	71
726c4a25 BB	72	#ifdef assert
	73	#undef assert
	74	#endif
	75
3c67d83a TH	76	/* Compile time assert */
	77	#define CTASSERT_GLOBAL(x) _CTASSERT(x, __LINE__)
	78	#define CTASSERT(x) { _CTASSERT(x, __LINE__); }
	79	#define _CTASSERT(x, y) __CTASSERT(x, y)
	80	#define __CTASSERT(x, y) \
	81	typedef char __attribute__((unused)) \
	82	__compile_time_assertion__ ## y[(x) ? 1 : -1]
	83
a26baf28 BB	84	#ifdef NDEBUG
	85	#define ASSERT3S(x, y, z) ((void)0)
	86	#define ASSERT3U(x, y, z) ((void)0)
	87	#define ASSERT3P(x, y, z) ((void)0)
c99c9001	88	#define ASSERT0(x) ((void)0)
726c4a25 BB	89	#define ASSERT(x) ((void)0)
726c4a25 BB	90	#define assert(x) ((void)0)
a26baf28	91	#define ASSERTV(x)
fa720217 BB	92	#define IMPLY(A, B) ((void)0)
fa720217 BB	93	#define EQUIV(A, B) ((void)0)
a26baf28 BB	94	#else
	95	#define ASSERT3S(x, y, z) VERIFY3S(x, y, z)
	96	#define ASSERT3U(x, y, z) VERIFY3U(x, y, z)
	97	#define ASSERT3P(x, y, z) VERIFY3P(x, y, z)
c99c9001	98	#define ASSERT0(x) VERIFY0(x)
726c4a25 BB	99	#define ASSERT(x) VERIFY(x)
726c4a25 BB	100	#define assert(x) VERIFY(x)
a26baf28	101	#define ASSERTV(x) x
fa720217 BB	102	#define IMPLY(A, B) \
fa720217 BB	103	((void)(((!(A)) \|\| (B)) \|\| \
726c4a25 BB	104	libspl_assert("(" #A ") implies (" #B ")", \
726c4a25 BB	105	__FILE__, __FUNCTION__, __LINE__)))
fa720217 BB	106	#define EQUIV(A, B) \
fa720217 BB	107	((void)((!!(A) == !!(B)) \|\| \
726c4a25 BB	108	libspl_assert("(" #A ") is equivalent to (" #B ")", \
726c4a25 BB	109	__FILE__, __FUNCTION__, __LINE__)))
fa720217	110
a26baf28 BB	111	#endif /* NDEBUG */
	112
	113	#endif /* _LIBSPL_ASSERT_H */