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3e37ea85af
Sponsored-by: https://despairlabs.com/sponsor/ Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Rob Norris <robn@despairlabs.com> Closes #17861
90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
// SPDX-License-Identifier: CDDL-1.0
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or https://opensource.org/licenses/CDDL-1.0.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2012, 2018 by Delphix. All rights reserved.
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* Copyright (c) 2016 Actifio, Inc. All rights reserved.
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* Copyright (c) 2025, Klara, Inc.
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*/
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#include <assert.h>
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#include <pthread.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/mutex.h>
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/*
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* =========================================================================
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* mutexes
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* =========================================================================
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*/
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void
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mutex_init(kmutex_t *mp, char *name, int type, void *cookie)
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{
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(void) name, (void) type, (void) cookie;
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VERIFY0(pthread_mutex_init(&mp->m_lock, NULL));
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memset(&mp->m_owner, 0, sizeof (pthread_t));
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}
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void
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mutex_destroy(kmutex_t *mp)
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{
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VERIFY0(pthread_mutex_destroy(&mp->m_lock));
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}
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void
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mutex_enter(kmutex_t *mp)
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{
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VERIFY0(pthread_mutex_lock(&mp->m_lock));
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mp->m_owner = pthread_self();
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}
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int
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mutex_enter_check_return(kmutex_t *mp)
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{
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int error = pthread_mutex_lock(&mp->m_lock);
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if (error == 0)
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mp->m_owner = pthread_self();
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return (error);
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}
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int
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mutex_tryenter(kmutex_t *mp)
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{
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int error = pthread_mutex_trylock(&mp->m_lock);
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if (error == 0) {
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mp->m_owner = pthread_self();
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return (1);
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} else {
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VERIFY3S(error, ==, EBUSY);
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return (0);
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}
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}
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void
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mutex_exit(kmutex_t *mp)
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{
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memset(&mp->m_owner, 0, sizeof (pthread_t));
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VERIFY0(pthread_mutex_unlock(&mp->m_lock));
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}
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