diff options
Diffstat (limited to 'locks/netware/thread_mutex.c')
| -rw-r--r-- | locks/netware/thread_mutex.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/locks/netware/thread_mutex.c b/locks/netware/thread_mutex.c new file mode 100644 index 0000000..435abeb --- /dev/null +++ b/locks/netware/thread_mutex.c @@ -0,0 +1,181 @@ +/* Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "apr.h" +#include "apr_private.h" +#include "apr_general.h" +#include "apr_strings.h" +#include "apr_arch_thread_mutex.h" +#include "apr_thread_cond.h" +#include "apr_portable.h" + +static apr_status_t thread_mutex_cleanup(void *data) +{ + apr_thread_mutex_t *mutex = (apr_thread_mutex_t *)data; + + NXMutexFree(mutex->mutex); + return APR_SUCCESS; +} + +APR_DECLARE(apr_status_t) apr_thread_mutex_create(apr_thread_mutex_t **mutex, + unsigned int flags, + apr_pool_t *pool) +{ + apr_thread_mutex_t *new_mutex = NULL; + + /* XXX: Implement _UNNESTED flavor and favor _DEFAULT for performance + */ + if (flags & APR_THREAD_MUTEX_UNNESTED) { + return APR_ENOTIMPL; + } + new_mutex = (apr_thread_mutex_t *)apr_pcalloc(pool, sizeof(apr_thread_mutex_t)); + + if (new_mutex == NULL) { + return APR_ENOMEM; + } + new_mutex->pool = pool; + + new_mutex->mutex = NXMutexAlloc(NX_MUTEX_RECURSIVE, 0, NULL); + + if(new_mutex->mutex == NULL) + return APR_ENOMEM; + + if (flags & APR_THREAD_MUTEX_TIMED) { + apr_status_t rv = apr_thread_cond_create(&new_mutex->cond, pool); + if (rv != APR_SUCCESS) { + NXMutexFree(new_mutex->mutex); + return rv; + } + } + + apr_pool_cleanup_register(new_mutex->pool, new_mutex, + (void*)thread_mutex_cleanup, + apr_pool_cleanup_null); + *mutex = new_mutex; + return APR_SUCCESS; +} + +APR_DECLARE(apr_status_t) apr_thread_mutex_lock(apr_thread_mutex_t *mutex) +{ + if (mutex->cond) { + apr_status_t rv; + NXLock(mutex->mutex); + if (mutex->locked) { + mutex->num_waiters++; + rv = apr_thread_cond_wait(mutex->cond, mutex); + mutex->num_waiters--; + } + else { + mutex->locked = 1; + rv = APR_SUCCESS; + } + NXUnlock(mutex->mutex); + return rv; + } + + NXLock(mutex->mutex); + return APR_SUCCESS; +} + +APR_DECLARE(apr_status_t) apr_thread_mutex_trylock(apr_thread_mutex_t *mutex) +{ + if (mutex->cond) { + apr_status_t rv; + NXLock(mutex->mutex); + if (mutex->locked) { + rv = APR_EBUSY; + } + else { + mutex->locked = 1; + rv = APR_SUCCESS; + } + NXUnlock(mutex->mutex); + return rv; + } + + if (!NXTryLock(mutex->mutex)) + return APR_EBUSY; + return APR_SUCCESS; +} + +APR_DECLARE(apr_status_t) apr_thread_mutex_timedlock(apr_thread_mutex_t *mutex, + apr_interval_time_t timeout) +{ + if (mutex->cond) { + apr_status_t rv = APR_SUCCESS; + + NXLock(mutex->mutex); + if (mutex->locked) { + if (timeout <= 0) { + rv = APR_TIMEUP; + } + else { + mutex->num_waiters++; + do { + rv = apr_thread_cond_timedwait(mutex->cond, mutex, + timeout); + } while (rv == APR_SUCCESS && mutex->locked); + mutex->num_waiters--; + } + } + if (rv == APR_SUCCESS) { + mutex->locked = 1; + } + NXUnlock(mutex->mutex); + return rv; + } + + return APR_ENOTIMPL; +} + +APR_DECLARE(apr_status_t) apr_thread_mutex_unlock(apr_thread_mutex_t *mutex) +{ + apr_status_t rv = APR_SUCCESS; + + if (mutex->cond) { + NXLock(mutex->mutex); + + if (!mutex->locked) { + rv = APR_EINVAL; + } + else if (mutex->num_waiters) { + rv = apr_thread_cond_signal(mutex->cond); + } + if (rv == APR_SUCCESS) { + mutex->locked = 0; + } + } + + NXUnlock(mutex->mutex); + return rv; +} + +APR_DECLARE(apr_status_t) apr_thread_mutex_destroy(apr_thread_mutex_t *mutex) +{ + apr_status_t stat, rv = APR_SUCCESS; + if (mutex->cond) { + rv = apr_thread_cond_destroy(mutex->cond); + mutex->cond = NULL; + } + stat = apr_pool_cleanup_run(mutex->pool, mutex, thread_mutex_cleanup); + if (stat == APR_SUCCESS && rv) { + stat = rv; + } + return stat; +} + +APR_POOL_IMPLEMENT_ACCESSOR(thread_mutex) + |