1251875Speter/* Licensed to the Apache Software Foundation (ASF) under one or more 2251875Speter * contributor license agreements. See the NOTICE file distributed with 3251875Speter * this work for additional information regarding copyright ownership. 4251875Speter * The ASF licenses this file to You under the Apache License, Version 2.0 5251875Speter * (the "License"); you may not use this file except in compliance with 6251875Speter * the License. You may obtain a copy of the License at 7251875Speter * 8251875Speter * http://www.apache.org/licenses/LICENSE-2.0 9251875Speter * 10251875Speter * Unless required by applicable law or agreed to in writing, software 11251875Speter * distributed under the License is distributed on an "AS IS" BASIS, 12251875Speter * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13251875Speter * See the License for the specific language governing permissions and 14251875Speter * limitations under the License. 15251875Speter */ 16251875Speter 17251875Speter#include "apr_arch_thread_rwlock.h" 18251875Speter#include "apr_private.h" 19251875Speter 20251875Speter#if APR_HAS_THREADS 21251875Speter 22251875Speter#ifdef HAVE_PTHREAD_RWLOCKS 23251875Speter 24251875Speter/* The rwlock must be initialized but not locked by any thread when 25251875Speter * cleanup is called. */ 26251875Speterstatic apr_status_t thread_rwlock_cleanup(void *data) 27251875Speter{ 28251875Speter apr_thread_rwlock_t *rwlock = (apr_thread_rwlock_t *)data; 29251875Speter apr_status_t stat; 30251875Speter 31251875Speter stat = pthread_rwlock_destroy(&rwlock->rwlock); 32251875Speter#ifdef HAVE_ZOS_PTHREADS 33251875Speter if (stat) { 34251875Speter stat = errno; 35251875Speter } 36251875Speter#endif 37251875Speter return stat; 38251875Speter} 39251875Speter 40251875SpeterAPR_DECLARE(apr_status_t) apr_thread_rwlock_create(apr_thread_rwlock_t **rwlock, 41251875Speter apr_pool_t *pool) 42251875Speter{ 43251875Speter apr_thread_rwlock_t *new_rwlock; 44251875Speter apr_status_t stat; 45251875Speter 46251875Speter new_rwlock = apr_palloc(pool, sizeof(apr_thread_rwlock_t)); 47251875Speter new_rwlock->pool = pool; 48251875Speter 49251875Speter if ((stat = pthread_rwlock_init(&new_rwlock->rwlock, NULL))) { 50251875Speter#ifdef HAVE_ZOS_PTHREADS 51251875Speter stat = errno; 52251875Speter#endif 53251875Speter return stat; 54251875Speter } 55251875Speter 56251875Speter apr_pool_cleanup_register(new_rwlock->pool, 57251875Speter (void *)new_rwlock, thread_rwlock_cleanup, 58251875Speter apr_pool_cleanup_null); 59251875Speter 60251875Speter *rwlock = new_rwlock; 61251875Speter return APR_SUCCESS; 62251875Speter} 63251875Speter 64251875SpeterAPR_DECLARE(apr_status_t) apr_thread_rwlock_rdlock(apr_thread_rwlock_t *rwlock) 65251875Speter{ 66251875Speter apr_status_t stat; 67251875Speter 68251875Speter stat = pthread_rwlock_rdlock(&rwlock->rwlock); 69251875Speter#ifdef HAVE_ZOS_PTHREADS 70251875Speter if (stat) { 71251875Speter stat = errno; 72251875Speter } 73251875Speter#endif 74251875Speter return stat; 75251875Speter} 76251875Speter 77251875SpeterAPR_DECLARE(apr_status_t) apr_thread_rwlock_tryrdlock(apr_thread_rwlock_t *rwlock) 78251875Speter{ 79251875Speter apr_status_t stat; 80251875Speter 81251875Speter stat = pthread_rwlock_tryrdlock(&rwlock->rwlock); 82251875Speter#ifdef HAVE_ZOS_PTHREADS 83251875Speter if (stat) { 84251875Speter stat = errno; 85251875Speter } 86251875Speter#endif 87251875Speter /* Normalize the return code. */ 88251875Speter if (stat == EBUSY) 89251875Speter stat = APR_EBUSY; 90251875Speter return stat; 91251875Speter} 92251875Speter 93251875SpeterAPR_DECLARE(apr_status_t) apr_thread_rwlock_wrlock(apr_thread_rwlock_t *rwlock) 94251875Speter{ 95251875Speter apr_status_t stat; 96251875Speter 97251875Speter stat = pthread_rwlock_wrlock(&rwlock->rwlock); 98251875Speter#ifdef HAVE_ZOS_PTHREADS 99251875Speter if (stat) { 100251875Speter stat = errno; 101251875Speter } 102251875Speter#endif 103251875Speter return stat; 104251875Speter} 105251875Speter 106251875SpeterAPR_DECLARE(apr_status_t) apr_thread_rwlock_trywrlock(apr_thread_rwlock_t *rwlock) 107251875Speter{ 108251875Speter apr_status_t stat; 109251875Speter 110251875Speter stat = pthread_rwlock_trywrlock(&rwlock->rwlock); 111251875Speter#ifdef HAVE_ZOS_PTHREADS 112251875Speter if (stat) { 113251875Speter stat = errno; 114251875Speter } 115251875Speter#endif 116251875Speter /* Normalize the return code. */ 117251875Speter if (stat == EBUSY) 118251875Speter stat = APR_EBUSY; 119251875Speter return stat; 120251875Speter} 121251875Speter 122251875SpeterAPR_DECLARE(apr_status_t) apr_thread_rwlock_unlock(apr_thread_rwlock_t *rwlock) 123251875Speter{ 124251875Speter apr_status_t stat; 125251875Speter 126251875Speter stat = pthread_rwlock_unlock(&rwlock->rwlock); 127251875Speter#ifdef HAVE_ZOS_PTHREADS 128251875Speter if (stat) { 129251875Speter stat = errno; 130251875Speter } 131251875Speter#endif 132251875Speter return stat; 133251875Speter} 134251875Speter 135251875SpeterAPR_DECLARE(apr_status_t) apr_thread_rwlock_destroy(apr_thread_rwlock_t *rwlock) 136251875Speter{ 137251875Speter return apr_pool_cleanup_run(rwlock->pool, rwlock, thread_rwlock_cleanup); 138251875Speter} 139251875Speter 140251875Speter#else /* HAVE_PTHREAD_RWLOCKS */ 141251875Speter 142251875SpeterAPR_DECLARE(apr_status_t) apr_thread_rwlock_create(apr_thread_rwlock_t **rwlock, 143251875Speter apr_pool_t *pool) 144251875Speter{ 145251875Speter return APR_ENOTIMPL; 146251875Speter} 147251875Speter 148251875SpeterAPR_DECLARE(apr_status_t) apr_thread_rwlock_rdlock(apr_thread_rwlock_t *rwlock) 149251875Speter{ 150251875Speter return APR_ENOTIMPL; 151251875Speter} 152251875Speter 153251875SpeterAPR_DECLARE(apr_status_t) apr_thread_rwlock_tryrdlock(apr_thread_rwlock_t *rwlock) 154251875Speter{ 155251875Speter return APR_ENOTIMPL; 156251875Speter} 157251875Speter 158251875SpeterAPR_DECLARE(apr_status_t) apr_thread_rwlock_wrlock(apr_thread_rwlock_t *rwlock) 159251875Speter{ 160251875Speter return APR_ENOTIMPL; 161251875Speter} 162251875Speter 163251875SpeterAPR_DECLARE(apr_status_t) apr_thread_rwlock_trywrlock(apr_thread_rwlock_t *rwlock) 164251875Speter{ 165251875Speter return APR_ENOTIMPL; 166251875Speter} 167251875Speter 168251875SpeterAPR_DECLARE(apr_status_t) apr_thread_rwlock_unlock(apr_thread_rwlock_t *rwlock) 169251875Speter{ 170251875Speter return APR_ENOTIMPL; 171251875Speter} 172251875Speter 173251875SpeterAPR_DECLARE(apr_status_t) apr_thread_rwlock_destroy(apr_thread_rwlock_t *rwlock) 174251875Speter{ 175251875Speter return APR_ENOTIMPL; 176251875Speter} 177251875Speter 178251875Speter#endif /* HAVE_PTHREAD_RWLOCKS */ 179251875SpeterAPR_POOL_IMPLEMENT_ACCESSOR(thread_rwlock) 180251875Speter 181251875Speter#endif /* APR_HAS_THREADS */ 182