mirror_zfs/lib/libspl/include/sys/cmn_err.h
Attila Fülöp 1191387012
spl: Add cmn_err_once() to log a message only on the first call
Reviewed-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Signed-off-by: Attila Fülöp <attila@fueloep.org>
Closes #14567
2023-03-07 13:44:11 -08:00

65 lines
1.7 KiB
C

/*
* 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, ...) \
{ \
static volatile uint32_t printed = 0; \
if (atomic_cas_32(&printed, 0, 1) == 0) { \
cmn_err(ce, __VA_ARGS__); \
} \
}
#define vcmn_err_once(ce, fmt, ap) \
{ \
static volatile uint32_t printed = 0; \
if (atomic_cas_32(&printed, 0, 1) == 0) { \
vcmn_err(ce, fmt, ap); \
} \
}
#define zcmn_err_once(zone, ce, ...) \
{ \
static volatile uint32_t printed = 0; \
if (atomic_cas_32(&printed, 0, 1) == 0) { \
zcmn_err(zone, ce, __VA_ARGS__); \
} \
}
#define vzcmn_err_once(zone, ce, fmt, ap) \
{ \
static volatile uint32_t printed = 0; \
if (atomic_cas_32(&printed, 0, 1) == 0) { \
vzcmn_err(zone, ce, fmt, ap); \
} \
}
#endif