1/* Licensed to the Apache Software Foundation (ASF) under one or more 2 * contributor license agreements. See the NOTICE file distributed with 3 * this work for additional information regarding copyright ownership. 4 * The ASF licenses this file to You under the Apache License, Version 2.0 5 * (the "License"); you may not use this file except in compliance with 6 * the License. You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "apr_general.h" 18#include "apr_lib.h" 19#include "apr_strings.h" 20#include "apr_portable.h" 21#include "apr_arch_thread_mutex.h" 22#include "apr_arch_file_io.h" 23#include <string.h> 24#include <stddef.h> 25 26static apr_status_t thread_mutex_cleanup(void *themutex) 27{ 28 apr_thread_mutex_t *mutex = themutex; 29 return apr_thread_mutex_destroy(mutex); 30} 31 32 33 34/* XXX: Need to respect APR_THREAD_MUTEX_[UN]NESTED flags argument 35 * or return APR_ENOTIMPL!!! 36 */ 37APR_DECLARE(apr_status_t) apr_thread_mutex_create(apr_thread_mutex_t **mutex, 38 unsigned int flags, 39 apr_pool_t *pool) 40{ 41 apr_thread_mutex_t *new_mutex; 42 ULONG rc; 43 44 new_mutex = (apr_thread_mutex_t *)apr_palloc(pool, sizeof(apr_thread_mutex_t)); 45 new_mutex->pool = pool; 46 47 rc = DosCreateMutexSem(NULL, &(new_mutex->hMutex), 0, FALSE); 48 *mutex = new_mutex; 49 50 if (!rc) 51 apr_pool_cleanup_register(pool, new_mutex, thread_mutex_cleanup, apr_pool_cleanup_null); 52 53 return APR_OS2_STATUS(rc); 54} 55 56 57 58APR_DECLARE(apr_status_t) apr_thread_mutex_lock(apr_thread_mutex_t *mutex) 59{ 60 ULONG rc = DosRequestMutexSem(mutex->hMutex, SEM_INDEFINITE_WAIT); 61 return APR_OS2_STATUS(rc); 62} 63 64 65 66APR_DECLARE(apr_status_t) apr_thread_mutex_trylock(apr_thread_mutex_t *mutex) 67{ 68 ULONG rc = DosRequestMutexSem(mutex->hMutex, SEM_IMMEDIATE_RETURN); 69 return APR_OS2_STATUS(rc); 70} 71 72 73 74APR_DECLARE(apr_status_t) apr_thread_mutex_unlock(apr_thread_mutex_t *mutex) 75{ 76 ULONG rc = DosReleaseMutexSem(mutex->hMutex); 77 return APR_OS2_STATUS(rc); 78} 79 80 81 82APR_DECLARE(apr_status_t) apr_thread_mutex_destroy(apr_thread_mutex_t *mutex) 83{ 84 ULONG rc; 85 86 if (mutex->hMutex == 0) 87 return APR_SUCCESS; 88 89 while (DosReleaseMutexSem(mutex->hMutex) == 0); 90 91 rc = DosCloseMutexSem(mutex->hMutex); 92 93 if (!rc) { 94 mutex->hMutex = 0; 95 return APR_SUCCESS; 96 } 97 98 return APR_FROM_OS_ERROR(rc); 99} 100 101APR_POOL_IMPLEMENT_ACCESSOR(thread_mutex) 102 103