zfs/lib/libspl/include/sys/cmn_err.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 https://opensource.org/licenses/CDDL-1.0.
 * 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 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _LIBSPL_SYS_CMN_ERR_H
#define	_LIBSPL_SYS_CMN_ERR_H

#include <atomic.h>

#define	cmn_err_once(ce, ...)				\
do {							\
	static volatile uint32_t printed = 0;		\
	if (atomic_cas_32(&printed, 0, 1) == 0) {	\
		cmn_err(ce, __VA_ARGS__);		\
	}						\
} while (0)

#define	vcmn_err_once(ce, fmt, ap)			\
do {							\
	static volatile uint32_t printed = 0;		\
	if (atomic_cas_32(&printed, 0, 1) == 0) {	\
		vcmn_err(ce, fmt, ap);			\
	}						\
} while (0)

#define	zcmn_err_once(zone, ce, ...)			\
do {							\
	static volatile uint32_t printed = 0;		\
	if (atomic_cas_32(&printed, 0, 1) == 0) {	\
		zcmn_err(zone, ce, __VA_ARGS__);	\
	}						\
} while (0)

#define	vzcmn_err_once(zone, ce, fmt, ap)		\
do {							\
	static volatile uint32_t printed = 0;		\
	if (atomic_cas_32(&printed, 0, 1) == 0) {	\
		vzcmn_err(zone, ce, fmt, ap);		\
	}						\
} while (0)

#endif