1 // SPDX-License-Identifier: CDDL-1.0 2 /* 3 * CDDL HEADER START 4 * 5 * The contents of this file are subject to the terms of the 6 * Common Development and Distribution License (the "License"). 7 * You may not use this file except in compliance with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or https://opensource.org/licenses/CDDL-1.0. 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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2012, 2018 by Delphix. All rights reserved. 25 * Copyright (c) 2016 Actifio, Inc. All rights reserved. 26 * Copyright (c) 2025, Klara, Inc. 27 */ 28 29 #include <assert.h> 30 #include <pthread.h> 31 #include <string.h> 32 #include <errno.h> 33 #include <sys/mutex.h> 34 35 /* 36 * ========================================================================= 37 * mutexes 38 * ========================================================================= 39 */ 40 41 void 42 mutex_init(kmutex_t *mp, char *name, int type, void *cookie) 43 { 44 (void) name, (void) type, (void) cookie; 45 VERIFY0(pthread_mutex_init(&mp->m_lock, NULL)); 46 memset(&mp->m_owner, 0, sizeof (pthread_t)); 47 } 48 49 void 50 mutex_destroy(kmutex_t *mp) 51 { 52 VERIFY0(pthread_mutex_destroy(&mp->m_lock)); 53 } 54 55 void 56 mutex_enter(kmutex_t *mp) 57 { 58 VERIFY0(pthread_mutex_lock(&mp->m_lock)); 59 mp->m_owner = pthread_self(); 60 } 61 62 int 63 mutex_enter_check_return(kmutex_t *mp) 64 { 65 int error = pthread_mutex_lock(&mp->m_lock); 66 if (error == 0) 67 mp->m_owner = pthread_self(); 68 return (error); 69 } 70 71 int 72 mutex_tryenter(kmutex_t *mp) 73 { 74 int error = pthread_mutex_trylock(&mp->m_lock); 75 if (error == 0) { 76 mp->m_owner = pthread_self(); 77 return (1); 78 } else { 79 VERIFY3S(error, ==, EBUSY); 80 return (0); 81 } 82 } 83 84 void 85 mutex_exit(kmutex_t *mp) 86 { 87 memset(&mp->m_owner, 0, sizeof (pthread_t)); 88 VERIFY0(pthread_mutex_unlock(&mp->m_lock)); 89 } 90