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/* 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_portable.h"
#include "apr_arch_threadproc.h"
#if APR_HAS_THREADS
#if APR_HAVE_PTHREAD_H
/* Destroy the threadattr object */
static apr_status_t threadattr_cleanup(void *data)
{
apr_threadattr_t *attr = data;
apr_status_t rv;
rv = pthread_attr_destroy(&attr->attr);
#ifdef HAVE_ZOS_PTHREADS
if (rv) {
rv = errno;
}
#endif
return rv;
}
APR_DECLARE(apr_status_t) apr_threadattr_create(apr_threadattr_t **new,
apr_pool_t *pool)
{
apr_status_t stat;
(*new) = apr_palloc(pool, sizeof(apr_threadattr_t));
(*new)->pool = pool;
stat = pthread_attr_init(&(*new)->attr);
if (stat == 0) {
apr_pool_cleanup_register(pool, *new, threadattr_cleanup,
apr_pool_cleanup_null);
return APR_SUCCESS;
}
#ifdef HAVE_ZOS_PTHREADS
stat = errno;
#endif
return stat;
}
#if defined(PTHREAD_CREATE_DETACHED)
#define DETACH_ARG(v) ((v) ? PTHREAD_CREATE_DETACHED : PTHREAD_CREATE_JOINABLE)
#else
#define DETACH_ARG(v) ((v) ? 1 : 0)
#endif
APR_DECLARE(apr_status_t) apr_threadattr_detach_set(apr_threadattr_t *attr,
apr_int32_t on)
{
apr_status_t stat;
#ifdef HAVE_ZOS_PTHREADS
int arg = DETACH_ARG(on);
if ((stat = pthread_attr_setdetachstate(&attr->attr, &arg)) == 0) {
#else
if ((stat = pthread_attr_setdetachstate(&attr->attr,
DETACH_ARG(on))) == 0) {
#endif
return APR_SUCCESS;
}
else {
#ifdef HAVE_ZOS_PTHREADS
stat = errno;
#endif
return stat;
}
}
APR_DECLARE(apr_status_t) apr_threadattr_detach_get(apr_threadattr_t *attr)
{
int state;
#ifdef PTHREAD_ATTR_GETDETACHSTATE_TAKES_ONE_ARG
state = pthread_attr_getdetachstate(&attr->attr);
#else
pthread_attr_getdetachstate(&attr->attr, &state);
#endif
if (state == DETACH_ARG(1))
return APR_DETACH;
return APR_NOTDETACH;
}
APR_DECLARE(apr_status_t) apr_threadattr_stacksize_set(apr_threadattr_t *attr,
apr_size_t stacksize)
{
int stat;
stat = pthread_attr_setstacksize(&attr->attr, stacksize);
if (stat == 0) {
return APR_SUCCESS;
}
#ifdef HAVE_ZOS_PTHREADS
stat = errno;
#endif
return stat;
}
APR_DECLARE(apr_status_t) apr_threadattr_guardsize_set(apr_threadattr_t *attr,
apr_size_t size)
{
#ifdef HAVE_PTHREAD_ATTR_SETGUARDSIZE
apr_status_t rv;
rv = pthread_attr_setguardsize(&attr->attr, size);
if (rv == 0) {
return APR_SUCCESS;
}
#ifdef HAVE_ZOS_PTHREADS
rv = errno;
#endif
return rv;
#else
return APR_ENOTIMPL;
#endif
}
APR_DECLARE(apr_status_t) apr_threadattr_max_free_set(apr_threadattr_t *attr,
apr_size_t size)
{
attr->max_free = size;
return APR_SUCCESS;
}
#if APR_HAS_THREAD_LOCAL
static APR_THREAD_LOCAL apr_thread_t *current_thread = NULL;
#endif
static void *dummy_worker(void *opaque)
{
apr_thread_t *thread = (apr_thread_t*)opaque;
void *ret;
#if APR_HAS_THREAD_LOCAL
current_thread = thread;
#endif
apr_pool_owner_set(thread->pool, 0);
ret = thread->func(thread, thread->data);
if (thread->detached) {
apr_pool_destroy(thread->pool);
}
return ret;
}
static apr_status_t alloc_thread(apr_thread_t **new,
apr_threadattr_t *attr,
apr_thread_start_t func, void *data,
apr_pool_t *pool)
{
apr_status_t stat;
apr_abortfunc_t abort_fn = apr_pool_abort_get(pool);
apr_pool_t *p;
/* The thread can be detached anytime (from the creation or later with
* apr_thread_detach), so it needs its own pool and allocator to not
* depend on a parent pool which could be destroyed before the thread
* exits. The allocator needs no mutex obviously since the pool should
* not be used nor create children pools outside the thread. Passing
* NULL allocator will create one like that.
*/
stat = apr_pool_create_unmanaged_ex(&p, abort_fn, NULL);
if (stat != APR_SUCCESS) {
return stat;
}
if (attr && attr->max_free) {
apr_allocator_max_free_set(apr_pool_allocator_get(p), attr->max_free);
}
(*new) = (apr_thread_t *)apr_pcalloc(p, sizeof(apr_thread_t));
if ((*new) == NULL) {
apr_pool_destroy(p);
return APR_ENOMEM;
}
(*new)->pool = p;
(*new)->data = data;
(*new)->func = func;
(*new)->detached = (attr && apr_threadattr_detach_get(attr) == APR_DETACH);
(*new)->td = (pthread_t *)apr_pcalloc(p, sizeof(pthread_t));
if ((*new)->td == NULL) {
apr_pool_destroy(p);
return APR_ENOMEM;
}
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_thread_create(apr_thread_t **new,
apr_threadattr_t *attr,
apr_thread_start_t func,
void *data,
apr_pool_t *pool)
{
apr_status_t stat;
pthread_attr_t *temp;
stat = alloc_thread(new, attr, func, data, pool);
if (stat != APR_SUCCESS) {
return stat;
}
if (attr)
temp = &attr->attr;
else
temp = NULL;
if ((stat = pthread_create((*new)->td, temp, dummy_worker, (*new)))) {
#ifdef HAVE_ZOS_PTHREADS
stat = errno;
#endif
apr_pool_destroy((*new)->pool);
return stat;
}
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_thread_current_create(apr_thread_t **current,
apr_threadattr_t *attr,
apr_pool_t *pool)
{
apr_status_t stat;
*current = apr_thread_current();
if (*current) {
return APR_EEXIST;
}
stat = alloc_thread(current, attr, NULL, NULL, pool);
if (stat != APR_SUCCESS) {
*current = NULL;
return stat;
}
*(*current)->td = apr_os_thread_current();
#if APR_HAS_THREAD_LOCAL
current_thread = *current;
#endif
return APR_SUCCESS;
}
APR_DECLARE(void) apr_thread_current_after_fork(void)
{
#if APR_HAS_THREAD_LOCAL
current_thread = NULL;
#endif
}
APR_DECLARE(apr_thread_t *) apr_thread_current(void)
{
#if APR_HAS_THREAD_LOCAL
return current_thread;
#else
return NULL;
#endif
}
APR_DECLARE(apr_os_thread_t) apr_os_thread_current(void)
{
return pthread_self();
}
APR_DECLARE(int) apr_os_thread_equal(apr_os_thread_t tid1,
apr_os_thread_t tid2)
{
return pthread_equal(tid1, tid2);
}
APR_DECLARE(void) apr_thread_exit(apr_thread_t *thd,
apr_status_t retval)
{
thd->exitval = retval;
if (thd->detached) {
apr_pool_destroy(thd->pool);
}
pthread_exit(NULL);
}
APR_DECLARE(apr_status_t) apr_thread_join(apr_status_t *retval,
apr_thread_t *thd)
{
apr_status_t stat;
void *thread_stat;
if (thd->detached) {
return APR_EINVAL;
}
if ((stat = pthread_join(*thd->td, &thread_stat))) {
#ifdef HAVE_ZOS_PTHREADS
stat = errno;
#endif
return stat;
}
*retval = thd->exitval;
apr_pool_destroy(thd->pool);
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_thread_detach(apr_thread_t *thd)
{
apr_status_t stat;
if (thd->detached) {
return APR_EINVAL;
}
#ifdef HAVE_ZOS_PTHREADS
if ((stat = pthread_detach(thd->td)) == 0) {
#else
if ((stat = pthread_detach(*thd->td)) == 0) {
#endif
thd->detached = 1;
return APR_SUCCESS;
}
else {
#ifdef HAVE_ZOS_PTHREADS
stat = errno;
#endif
return stat;
}
}
APR_DECLARE(void) apr_thread_yield(void)
{
#ifdef HAVE_PTHREAD_YIELD
#ifdef HAVE_ZOS_PTHREADS
pthread_yield(NULL);
#else
pthread_yield();
#endif /* HAVE_ZOS_PTHREADS */
#else
#ifdef HAVE_SCHED_YIELD
sched_yield();
#endif
#endif
}
APR_DECLARE(apr_status_t) apr_thread_data_get(void **data, const char *key,
apr_thread_t *thread)
{
if (thread == NULL) {
*data = NULL;
return APR_ENOTHREAD;
}
return apr_pool_userdata_get(data, key, thread->pool);
}
APR_DECLARE(apr_status_t) apr_thread_data_set(void *data, const char *key,
apr_status_t (*cleanup)(void *),
apr_thread_t *thread)
{
if (thread == NULL) {
return APR_ENOTHREAD;
}
return apr_pool_userdata_set(data, key, cleanup, thread->pool);
}
APR_DECLARE(apr_status_t) apr_os_thread_get(apr_os_thread_t **thethd,
apr_thread_t *thd)
{
*thethd = thd->td;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_os_thread_put(apr_thread_t **thd,
apr_os_thread_t *thethd,
apr_pool_t *pool)
{
if (pool == NULL) {
return APR_ENOPOOL;
}
if ((*thd) == NULL) {
(*thd) = (apr_thread_t *)apr_pcalloc(pool, sizeof(apr_thread_t));
(*thd)->pool = pool;
}
(*thd)->td = thethd;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_thread_once_init(apr_thread_once_t **control,
apr_pool_t *p)
{
static const pthread_once_t once_init = PTHREAD_ONCE_INIT;
*control = apr_palloc(p, sizeof(**control));
(*control)->once = once_init;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_thread_once(apr_thread_once_t *control,
void (*func)(void))
{
return pthread_once(&control->once, func);
}
APR_POOL_IMPLEMENT_ACCESSOR(thread)
#endif /* HAVE_PTHREAD_H */
#endif /* APR_HAS_THREADS */
#if !APR_HAS_THREADS
/* avoid warning for no prototype */
APR_DECLARE(apr_status_t) apr_os_thread_get(void);
APR_DECLARE(apr_status_t) apr_os_thread_get(void)
{
return APR_ENOTIMPL;
}
#endif
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