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-rw-r--r--locks/unix/thread_mutex.c343
1 files changed, 343 insertions, 0 deletions
diff --git a/locks/unix/thread_mutex.c b/locks/unix/thread_mutex.c
new file mode 100644
index 0000000..5ba1914
--- /dev/null
+++ b/locks/unix/thread_mutex.c
@@ -0,0 +1,343 @@
+/* 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_arch_thread_mutex.h"
+#define APR_WANT_MEMFUNC
+#include "apr_want.h"
+
+#if APR_HAS_THREADS
+
+static apr_status_t thread_mutex_cleanup(void *data)
+{
+ apr_thread_mutex_t *mutex = data;
+ apr_status_t rv;
+
+ rv = pthread_mutex_destroy(&mutex->mutex);
+#ifdef HAVE_ZOS_PTHREADS
+ if (rv) {
+ rv = errno;
+ }
+#endif
+ return rv;
+}
+
+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;
+ apr_status_t rv;
+
+#ifndef HAVE_PTHREAD_MUTEX_RECURSIVE
+ if (flags & APR_THREAD_MUTEX_NESTED) {
+ return APR_ENOTIMPL;
+ }
+#endif
+
+ new_mutex = apr_pcalloc(pool, sizeof(apr_thread_mutex_t));
+ new_mutex->pool = pool;
+
+#ifdef HAVE_PTHREAD_MUTEX_RECURSIVE
+ if (flags & APR_THREAD_MUTEX_NESTED) {
+ pthread_mutexattr_t mattr;
+
+ rv = pthread_mutexattr_init(&mattr);
+ if (rv) return rv;
+
+ rv = pthread_mutexattr_settype(&mattr, PTHREAD_MUTEX_RECURSIVE);
+ if (rv) {
+ pthread_mutexattr_destroy(&mattr);
+ return rv;
+ }
+
+ rv = pthread_mutex_init(&new_mutex->mutex, &mattr);
+
+ pthread_mutexattr_destroy(&mattr);
+ } else
+#endif
+ rv = pthread_mutex_init(&new_mutex->mutex, NULL);
+
+ if (rv) {
+#ifdef HAVE_ZOS_PTHREADS
+ rv = errno;
+#endif
+ return rv;
+ }
+
+#ifndef HAVE_PTHREAD_MUTEX_TIMEDLOCK
+ if (flags & APR_THREAD_MUTEX_TIMED) {
+ rv = apr_thread_cond_create(&new_mutex->cond, pool);
+ if (rv) {
+#ifdef HAVE_ZOS_PTHREADS
+ rv = errno;
+#endif
+ pthread_mutex_destroy(&new_mutex->mutex);
+ return rv;
+ }
+ }
+#endif
+
+ apr_pool_cleanup_register(new_mutex->pool,
+ new_mutex, 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)
+{
+ apr_status_t rv;
+
+#ifndef HAVE_PTHREAD_MUTEX_TIMEDLOCK
+ if (mutex->cond) {
+ apr_status_t rv2;
+
+ rv = pthread_mutex_lock(&mutex->mutex);
+ if (rv) {
+#ifdef HAVE_ZOS_PTHREADS
+ rv = errno;
+#endif
+ return rv;
+ }
+
+ if (mutex->locked) {
+ mutex->num_waiters++;
+ rv = apr_thread_cond_wait(mutex->cond, mutex);
+ mutex->num_waiters--;
+ }
+ else {
+ mutex->locked = 1;
+ }
+
+ rv2 = pthread_mutex_unlock(&mutex->mutex);
+ if (rv2 && !rv) {
+#ifdef HAVE_ZOS_PTHREADS
+ rv = errno;
+#else
+ rv = rv2;
+#endif
+ }
+
+ return rv;
+ }
+#endif
+
+ rv = pthread_mutex_lock(&mutex->mutex);
+#ifdef HAVE_ZOS_PTHREADS
+ if (rv) {
+ rv = errno;
+ }
+#endif
+
+ return rv;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_mutex_trylock(apr_thread_mutex_t *mutex)
+{
+ apr_status_t rv;
+
+#ifndef HAVE_PTHREAD_MUTEX_TIMEDLOCK
+ if (mutex->cond) {
+ apr_status_t rv2;
+
+ rv = pthread_mutex_lock(&mutex->mutex);
+ if (rv) {
+#ifdef HAVE_ZOS_PTHREADS
+ rv = errno;
+#endif
+ return rv;
+ }
+
+ if (mutex->locked) {
+ rv = APR_EBUSY;
+ }
+ else {
+ mutex->locked = 1;
+ }
+
+ rv2 = pthread_mutex_unlock(&mutex->mutex);
+ if (rv2) {
+#ifdef HAVE_ZOS_PTHREADS
+ rv = errno;
+#else
+ rv = rv2;
+#endif
+ }
+
+ return rv;
+ }
+#endif
+
+ rv = pthread_mutex_trylock(&mutex->mutex);
+ if (rv) {
+#ifdef HAVE_ZOS_PTHREADS
+ rv = errno;
+#endif
+ return (rv == EBUSY) ? APR_EBUSY : rv;
+ }
+
+ return APR_SUCCESS;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_mutex_timedlock(apr_thread_mutex_t *mutex,
+ apr_interval_time_t timeout)
+{
+ apr_status_t rv = APR_ENOTIMPL;
+#if APR_HAS_TIMEDLOCKS
+
+#ifdef HAVE_PTHREAD_MUTEX_TIMEDLOCK
+ if (timeout <= 0) {
+ rv = pthread_mutex_trylock(&mutex->mutex);
+ if (rv) {
+#ifdef HAVE_ZOS_PTHREADS
+ rv = errno;
+#endif
+ if (rv == EBUSY) {
+ rv = APR_TIMEUP;
+ }
+ }
+ }
+ else {
+ struct timespec abstime;
+
+ timeout += apr_time_now();
+ abstime.tv_sec = apr_time_sec(timeout);
+ abstime.tv_nsec = apr_time_usec(timeout) * 1000; /* nanoseconds */
+
+ rv = pthread_mutex_timedlock(&mutex->mutex, &abstime);
+ if (rv) {
+#ifdef HAVE_ZOS_PTHREADS
+ rv = errno;
+#endif
+ if (rv == ETIMEDOUT) {
+ rv = APR_TIMEUP;
+ }
+ }
+ }
+
+#else /* HAVE_PTHREAD_MUTEX_TIMEDLOCK */
+
+ if (mutex->cond) {
+ rv = pthread_mutex_lock(&mutex->mutex);
+ if (rv) {
+#ifdef HAVE_ZOS_PTHREADS
+ rv = errno;
+#endif
+ return rv;
+ }
+
+ if (mutex->locked) {
+ if (timeout <= 0) {
+ rv = APR_TIMEUP;
+ }
+ else {
+ mutex->num_waiters++;
+ do {
+ rv = apr_thread_cond_timedwait(mutex->cond, mutex,
+ timeout);
+ if (rv) {
+#ifdef HAVE_ZOS_PTHREADS
+ rv = errno;
+#endif
+ break;
+ }
+ } while (mutex->locked);
+ mutex->num_waiters--;
+ }
+ if (rv) {
+ pthread_mutex_unlock(&mutex->mutex);
+ return rv;
+ }
+ }
+
+ mutex->locked = 1;
+
+ rv = pthread_mutex_unlock(&mutex->mutex);
+ if (rv) {
+#ifdef HAVE_ZOS_PTHREADS
+ rv = errno;
+#endif
+ return rv;
+ }
+ }
+
+#endif /* HAVE_PTHREAD_MUTEX_TIMEDLOCK */
+
+#endif /* APR_HAS_TIMEDLOCKS */
+ return rv;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_mutex_unlock(apr_thread_mutex_t *mutex)
+{
+ apr_status_t status;
+
+#ifndef HAVE_PTHREAD_MUTEX_TIMEDLOCK
+ if (mutex->cond) {
+ status = pthread_mutex_lock(&mutex->mutex);
+ if (status) {
+#ifdef HAVE_ZOS_PTHREADS
+ status = errno;
+#endif
+ return status;
+ }
+
+ if (!mutex->locked) {
+ status = APR_EINVAL;
+ }
+ else if (mutex->num_waiters) {
+ status = apr_thread_cond_signal(mutex->cond);
+ }
+ if (status) {
+ pthread_mutex_unlock(&mutex->mutex);
+ return status;
+ }
+
+ mutex->locked = 0;
+ }
+#endif
+
+ status = pthread_mutex_unlock(&mutex->mutex);
+#ifdef HAVE_ZOS_PTHREADS
+ if (status) {
+ status = errno;
+ }
+#endif
+
+ return status;
+}
+
+APR_DECLARE(apr_status_t) apr_thread_mutex_destroy(apr_thread_mutex_t *mutex)
+{
+ apr_status_t rv, rv2 = APR_SUCCESS;
+
+#ifndef HAVE_PTHREAD_MUTEX_TIMEDLOCK
+ if (mutex->cond) {
+ rv2 = apr_thread_cond_destroy(mutex->cond);
+ }
+#endif
+
+ rv = apr_pool_cleanup_run(mutex->pool, mutex, thread_mutex_cleanup);
+ if (rv == APR_SUCCESS) {
+ rv = rv2;
+ }
+
+ return rv;
+}
+
+APR_POOL_IMPLEMENT_ACCESSOR(thread_mutex)
+
+#endif /* APR_HAS_THREADS */
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