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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_private.h"
#include "win32/apr_arch_threadproc.h"
#include "apr_thread_proc.h"
#include "apr_general.h"
#include "apr_lib.h"
#include "apr_portable.h"
#if APR_HAVE_PROCESS_H
#include <process.h>
#endif
#include "apr_arch_misc.h"
/* Chosen for us by apr_initialize */
DWORD tls_apr_thread = 0;
APR_DECLARE(apr_status_t) apr_threadattr_create(apr_threadattr_t **new,
apr_pool_t *pool)
{
(*new) = (apr_threadattr_t *)apr_palloc(pool,
sizeof(apr_threadattr_t));
if ((*new) == NULL) {
return APR_ENOMEM;
}
(*new)->pool = pool;
(*new)->detach = 0;
(*new)->stacksize = 0;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_threadattr_detach_set(apr_threadattr_t *attr,
apr_int32_t on)
{
attr->detach = on;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_threadattr_detach_get(apr_threadattr_t *attr)
{
if (attr->detach == 1)
return APR_DETACH;
return APR_NOTDETACH;
}
APR_DECLARE(apr_status_t) apr_threadattr_stacksize_set(apr_threadattr_t *attr,
apr_size_t stacksize)
{
attr->stacksize = stacksize;
return APR_SUCCESS;
}
static void *dummy_worker(void *opaque)
{
apr_thread_t *thd = (apr_thread_t *)opaque;
TlsSetValue(tls_apr_thread, thd->td);
return thd->func(thd, thd->data);
}
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;
unsigned temp;
HANDLE handle;
(*new) = (apr_thread_t *)apr_palloc(pool, sizeof(apr_thread_t));
if ((*new) == NULL) {
return APR_ENOMEM;
}
(*new)->pool = pool;
(*new)->data = data;
(*new)->func = func;
(*new)->td = NULL;
stat = apr_pool_create(&(*new)->pool, pool);
if (stat != APR_SUCCESS) {
return stat;
}
/* Use 0 for Thread Stack Size, because that will default the stack to the
* same size as the calling thread.
*/
#ifndef _WIN32_WCE
if ((handle = (HANDLE)_beginthreadex(NULL,
attr && attr->stacksize > 0 ? attr->stacksize : 0,
(unsigned int (APR_THREAD_FUNC *)(void *))dummy_worker,
(*new), 0, &temp)) == 0) {
return APR_FROM_OS_ERROR(_doserrno);
}
#else
if ((handle = CreateThread(NULL,
attr && attr->stacksize > 0 ? attr->stacksize : 0,
(unsigned int (APR_THREAD_FUNC *)(void *))dummy_worker,
(*new), 0, &temp)) == 0) {
return apr_get_os_error();
}
#endif
if (attr && attr->detach) {
CloseHandle(handle);
}
else
(*new)->td = handle;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_thread_exit(apr_thread_t *thd,
apr_status_t retval)
{
thd->exitval = retval;
apr_pool_destroy(thd->pool);
thd->pool = NULL;
#ifndef _WIN32_WCE
_endthreadex(0);
#else
ExitThread(0);
#endif
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_thread_join(apr_status_t *retval,
apr_thread_t *thd)
{
apr_status_t rv = APR_SUCCESS;
if (!thd->td) {
/* Can not join on detached threads */
return APR_DETACH;
}
rv = WaitForSingleObject(thd->td, INFINITE);
if ( rv == WAIT_OBJECT_0 || rv == WAIT_ABANDONED) {
/* If the thread_exit has been called */
if (!thd->pool)
*retval = thd->exitval;
else
rv = APR_INCOMPLETE;
}
else
rv = apr_get_os_error();
CloseHandle(thd->td);
thd->td = NULL;
return rv;
}
APR_DECLARE(apr_status_t) apr_thread_detach(apr_thread_t *thd)
{
if (thd->td && CloseHandle(thd->td)) {
thd->td = NULL;
return APR_SUCCESS;
}
else {
return apr_get_os_error();
}
}
APR_DECLARE(void) apr_thread_yield()
{
/* SwitchToThread is not supported on Win9x, but since it's
* primarily a noop (entering time consuming code, therefore
* providing more critical threads a bit larger timeslice)
* we won't worry too much if it's not available.
*/
#ifndef _WIN32_WCE
if (apr_os_level >= APR_WIN_NT) {
SwitchToThread();
}
#endif
}
APR_DECLARE(apr_status_t) apr_thread_data_get(void **data, const char *key,
apr_thread_t *thread)
{
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)
{
return apr_pool_userdata_set(data, key, cleanup, thread->pool);
}
APR_DECLARE(apr_os_thread_t) apr_os_thread_current(void)
{
HANDLE hthread = (HANDLE)TlsGetValue(tls_apr_thread);
HANDLE hproc;
if (hthread) {
return hthread;
}
hproc = GetCurrentProcess();
hthread = GetCurrentThread();
if (!DuplicateHandle(hproc, hthread,
hproc, &hthread, 0, FALSE,
DUPLICATE_SAME_ACCESS)) {
return NULL;
}
TlsSetValue(tls_apr_thread, hthread);
return hthread;
}
APR_DECLARE(apr_status_t) apr_os_thread_get(apr_os_thread_t **thethd,
apr_thread_t *thd)
{
if (thd == NULL) {
return APR_ENOTHREAD;
}
*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_palloc(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)
{
(*control) = apr_pcalloc(p, sizeof(**control));
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_thread_once(apr_thread_once_t *control,
void (*func)(void))
{
if (!InterlockedExchange(&control->value, 1)) {
func();
}
return APR_SUCCESS;
}
APR_DECLARE(int) apr_os_thread_equal(apr_os_thread_t tid1,
apr_os_thread_t tid2)
{
/* Since the only tid's we support our are own, and
* apr_os_thread_current returns the identical handle
* to the one we created initially, the test is simple.
*/
return (tid1 == tid2);
}
APR_POOL_IMPLEMENT_ACCESSOR(thread)
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