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_private.h"
18 #include "apr_arch_threadproc.h"
19 #include "apr_thread_proc.h"
20 #include "apr_general.h"
21 #include "apr_lib.h"
22 #include "apr_portable.h"
23 #if APR_HAVE_PROCESS_H
24 #include <process.h>
25 #endif
26 #include "apr_arch_misc.h"
27
28 /* Chosen for us by apr_initialize */
29 DWORD tls_apr_thread = 0;
30
apr_threadattr_create(apr_threadattr_t ** new,apr_pool_t * pool)31 APR_DECLARE(apr_status_t) apr_threadattr_create(apr_threadattr_t **new,
32 apr_pool_t *pool)
33 {
34 (*new) = (apr_threadattr_t *)apr_palloc(pool,
35 sizeof(apr_threadattr_t));
36
37 if ((*new) == NULL) {
38 return APR_ENOMEM;
39 }
40
41 (*new)->pool = pool;
42 (*new)->detach = 0;
43 (*new)->stacksize = 0;
44
45 return APR_SUCCESS;
46 }
47
apr_threadattr_detach_set(apr_threadattr_t * attr,apr_int32_t on)48 APR_DECLARE(apr_status_t) apr_threadattr_detach_set(apr_threadattr_t *attr,
49 apr_int32_t on)
50 {
51 attr->detach = on;
52 return APR_SUCCESS;
53 }
54
apr_threadattr_detach_get(apr_threadattr_t * attr)55 APR_DECLARE(apr_status_t) apr_threadattr_detach_get(apr_threadattr_t *attr)
56 {
57 if (attr->detach == 1)
58 return APR_DETACH;
59 return APR_NOTDETACH;
60 }
61
apr_threadattr_stacksize_set(apr_threadattr_t * attr,apr_size_t stacksize)62 APR_DECLARE(apr_status_t) apr_threadattr_stacksize_set(apr_threadattr_t *attr,
63 apr_size_t stacksize)
64 {
65 attr->stacksize = stacksize;
66 return APR_SUCCESS;
67 }
68
apr_threadattr_guardsize_set(apr_threadattr_t * attr,apr_size_t size)69 APR_DECLARE(apr_status_t) apr_threadattr_guardsize_set(apr_threadattr_t *attr,
70 apr_size_t size)
71 {
72 return APR_ENOTIMPL;
73 }
74
dummy_worker(void * opaque)75 static void *dummy_worker(void *opaque)
76 {
77 apr_thread_t *thd = (apr_thread_t *)opaque;
78 TlsSetValue(tls_apr_thread, thd->td);
79 return thd->func(thd, thd->data);
80 }
81
apr_thread_create(apr_thread_t ** new,apr_threadattr_t * attr,apr_thread_start_t func,void * data,apr_pool_t * pool)82 APR_DECLARE(apr_status_t) apr_thread_create(apr_thread_t **new,
83 apr_threadattr_t *attr,
84 apr_thread_start_t func,
85 void *data, apr_pool_t *pool)
86 {
87 apr_status_t stat;
88 unsigned temp;
89 HANDLE handle;
90
91 (*new) = (apr_thread_t *)apr_palloc(pool, sizeof(apr_thread_t));
92
93 if ((*new) == NULL) {
94 return APR_ENOMEM;
95 }
96
97 (*new)->data = data;
98 (*new)->func = func;
99 (*new)->td = NULL;
100 stat = apr_pool_create(&(*new)->pool, pool);
101 if (stat != APR_SUCCESS) {
102 return stat;
103 }
104
105 /* Use 0 for default Thread Stack Size, because that will
106 * default the stack to the same size as the calling thread.
107 */
108 #ifndef _WIN32_WCE
109 if ((handle = (HANDLE)_beginthreadex(NULL,
110 (DWORD) (attr ? attr->stacksize : 0),
111 (unsigned int (APR_THREAD_FUNC *)(void *))dummy_worker,
112 (*new), 0, &temp)) == 0) {
113 return APR_FROM_OS_ERROR(_doserrno);
114 }
115 #else
116 if ((handle = CreateThread(NULL,
117 attr && attr->stacksize > 0 ? attr->stacksize : 0,
118 (unsigned int (APR_THREAD_FUNC *)(void *))dummy_worker,
119 (*new), 0, &temp)) == 0) {
120 return apr_get_os_error();
121 }
122 #endif
123 if (attr && attr->detach) {
124 CloseHandle(handle);
125 }
126 else
127 (*new)->td = handle;
128
129 return APR_SUCCESS;
130 }
131
apr_thread_exit(apr_thread_t * thd,apr_status_t retval)132 APR_DECLARE(apr_status_t) apr_thread_exit(apr_thread_t *thd,
133 apr_status_t retval)
134 {
135 thd->exitval = retval;
136 apr_pool_destroy(thd->pool);
137 thd->pool = NULL;
138 #ifndef _WIN32_WCE
139 _endthreadex(0);
140 #else
141 ExitThread(0);
142 #endif
143 return APR_SUCCESS;
144 }
145
apr_thread_join(apr_status_t * retval,apr_thread_t * thd)146 APR_DECLARE(apr_status_t) apr_thread_join(apr_status_t *retval,
147 apr_thread_t *thd)
148 {
149 apr_status_t rv = APR_SUCCESS;
150
151 if (!thd->td) {
152 /* Can not join on detached threads */
153 return APR_DETACH;
154 }
155 rv = WaitForSingleObject(thd->td, INFINITE);
156 if ( rv == WAIT_OBJECT_0 || rv == WAIT_ABANDONED) {
157 /* If the thread_exit has been called */
158 if (!thd->pool)
159 *retval = thd->exitval;
160 else
161 rv = APR_INCOMPLETE;
162 }
163 else
164 rv = apr_get_os_error();
165 CloseHandle(thd->td);
166 thd->td = NULL;
167
168 return rv;
169 }
170
apr_thread_detach(apr_thread_t * thd)171 APR_DECLARE(apr_status_t) apr_thread_detach(apr_thread_t *thd)
172 {
173 if (thd->td && CloseHandle(thd->td)) {
174 thd->td = NULL;
175 return APR_SUCCESS;
176 }
177 else {
178 return apr_get_os_error();
179 }
180 }
181
apr_thread_yield()182 APR_DECLARE(void) apr_thread_yield()
183 {
184 /* SwitchToThread is not supported on Win9x, but since it's
185 * primarily a noop (entering time consuming code, therefore
186 * providing more critical threads a bit larger timeslice)
187 * we won't worry too much if it's not available.
188 */
189 #ifndef _WIN32_WCE
190 if (apr_os_level >= APR_WIN_NT) {
191 SwitchToThread();
192 }
193 #endif
194 }
195
apr_thread_data_get(void ** data,const char * key,apr_thread_t * thread)196 APR_DECLARE(apr_status_t) apr_thread_data_get(void **data, const char *key,
197 apr_thread_t *thread)
198 {
199 return apr_pool_userdata_get(data, key, thread->pool);
200 }
201
apr_thread_data_set(void * data,const char * key,apr_status_t (* cleanup)(void *),apr_thread_t * thread)202 APR_DECLARE(apr_status_t) apr_thread_data_set(void *data, const char *key,
203 apr_status_t (*cleanup) (void *),
204 apr_thread_t *thread)
205 {
206 return apr_pool_userdata_set(data, key, cleanup, thread->pool);
207 }
208
209
apr_os_thread_current(void)210 APR_DECLARE(apr_os_thread_t) apr_os_thread_current(void)
211 {
212 HANDLE hthread = (HANDLE)TlsGetValue(tls_apr_thread);
213 HANDLE hproc;
214
215 if (hthread) {
216 return hthread;
217 }
218
219 hproc = GetCurrentProcess();
220 hthread = GetCurrentThread();
221 if (!DuplicateHandle(hproc, hthread,
222 hproc, &hthread, 0, FALSE,
223 DUPLICATE_SAME_ACCESS)) {
224 return NULL;
225 }
226 TlsSetValue(tls_apr_thread, hthread);
227 return hthread;
228 }
229
apr_os_thread_get(apr_os_thread_t ** thethd,apr_thread_t * thd)230 APR_DECLARE(apr_status_t) apr_os_thread_get(apr_os_thread_t **thethd,
231 apr_thread_t *thd)
232 {
233 if (thd == NULL) {
234 return APR_ENOTHREAD;
235 }
236 *thethd = thd->td;
237 return APR_SUCCESS;
238 }
239
apr_os_thread_put(apr_thread_t ** thd,apr_os_thread_t * thethd,apr_pool_t * pool)240 APR_DECLARE(apr_status_t) apr_os_thread_put(apr_thread_t **thd,
241 apr_os_thread_t *thethd,
242 apr_pool_t *pool)
243 {
244 if (pool == NULL) {
245 return APR_ENOPOOL;
246 }
247 if ((*thd) == NULL) {
248 (*thd) = (apr_thread_t *)apr_palloc(pool, sizeof(apr_thread_t));
249 (*thd)->pool = pool;
250 }
251 (*thd)->td = thethd;
252 return APR_SUCCESS;
253 }
254
apr_thread_once_init(apr_thread_once_t ** control,apr_pool_t * p)255 APR_DECLARE(apr_status_t) apr_thread_once_init(apr_thread_once_t **control,
256 apr_pool_t *p)
257 {
258 (*control) = apr_pcalloc(p, sizeof(**control));
259 return APR_SUCCESS;
260 }
261
apr_thread_once(apr_thread_once_t * control,void (* func)(void))262 APR_DECLARE(apr_status_t) apr_thread_once(apr_thread_once_t *control,
263 void (*func)(void))
264 {
265 if (!InterlockedExchange(&control->value, 1)) {
266 func();
267 }
268 return APR_SUCCESS;
269 }
270
apr_os_thread_equal(apr_os_thread_t tid1,apr_os_thread_t tid2)271 APR_DECLARE(int) apr_os_thread_equal(apr_os_thread_t tid1,
272 apr_os_thread_t tid2)
273 {
274 /* Since the only tid's we support our are own, and
275 * apr_os_thread_current returns the identical handle
276 * to the one we created initially, the test is simple.
277 */
278 return (tid1 == tid2);
279 }
280
281 APR_POOL_IMPLEMENT_ACCESSOR(thread)
282