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.h"
18#include "apr_portable.h"
19#include "apr_strings.h"
20#include "apr_arch_threadproc.h"
21
22static int thread_count = 0;
23
24apr_status_t apr_threadattr_create(apr_threadattr_t **new,
25                                                apr_pool_t *pool)
26{
27    (*new) = (apr_threadattr_t *)apr_palloc(pool,
28              sizeof(apr_threadattr_t));
29
30    if ((*new) == NULL) {
31        return APR_ENOMEM;
32    }
33
34    (*new)->pool = pool;
35    (*new)->stack_size = APR_DEFAULT_STACK_SIZE;
36    (*new)->detach = 0;
37    (*new)->thread_name = NULL;
38    return APR_SUCCESS;
39}
40
41apr_status_t apr_threadattr_detach_set(apr_threadattr_t *attr,apr_int32_t on)
42{
43    attr->detach = on;
44    return APR_SUCCESS;
45}
46
47apr_status_t apr_threadattr_detach_get(apr_threadattr_t *attr)
48{
49    if (attr->detach == 1)
50        return APR_DETACH;
51    return APR_NOTDETACH;
52}
53
54APR_DECLARE(apr_status_t) apr_threadattr_stacksize_set(apr_threadattr_t *attr,
55                                                       apr_size_t stacksize)
56{
57    attr->stack_size = stacksize;
58    return APR_SUCCESS;
59}
60
61APR_DECLARE(apr_status_t) apr_threadattr_guardsize_set(apr_threadattr_t *attr,
62                                                       apr_size_t size)
63{
64    return APR_ENOTIMPL;
65}
66
67static void *dummy_worker(void *opaque)
68{
69    apr_thread_t *thd = (apr_thread_t *)opaque;
70    return thd->func(thd, thd->data);
71}
72
73apr_status_t apr_thread_create(apr_thread_t **new,
74                               apr_threadattr_t *attr,
75                               apr_thread_start_t func,
76                               void *data,
77                               apr_pool_t *pool)
78{
79    apr_status_t stat;
80    long flags = NX_THR_BIND_CONTEXT;
81    char threadName[NX_MAX_OBJECT_NAME_LEN+1];
82    size_t stack_size = APR_DEFAULT_STACK_SIZE;
83
84    if (attr && attr->thread_name) {
85        strncpy (threadName, attr->thread_name, NX_MAX_OBJECT_NAME_LEN);
86    }
87    else {
88        sprintf(threadName, "APR_thread %04ld", ++thread_count);
89    }
90
91    /* An original stack size of 0 will allow NXCreateThread() to
92    *   assign a default system stack size.  An original stack
93    *   size of less than 0 will assign the APR default stack size.
94    *   anything else will be taken as is.
95    */
96    if (attr && (attr->stack_size >= 0)) {
97        stack_size = attr->stack_size;
98    }
99
100    (*new) = (apr_thread_t *)apr_palloc(pool, sizeof(apr_thread_t));
101
102    if ((*new) == NULL) {
103        return APR_ENOMEM;
104    }
105
106    (*new)->data = data;
107    (*new)->func = func;
108    (*new)->thread_name = (char*)apr_pstrdup(pool, threadName);
109
110    stat = apr_pool_create(&(*new)->pool, pool);
111    if (stat != APR_SUCCESS) {
112        return stat;
113    }
114
115    if (attr && attr->detach) {
116        flags |= NX_THR_DETACHED;
117    }
118
119    (*new)->ctx = NXContextAlloc(
120        /* void(*start_routine)(void *arg) */ (void (*)(void *)) dummy_worker,
121        /* void *arg */                       (*new),
122        /* int priority */                    NX_PRIO_MED,
123        /* NXSize_t stackSize */              stack_size,
124        /* long flags */                      NX_CTX_NORMAL,
125        /* int *error */                      &stat);
126
127    stat = NXContextSetName(
128        /* NXContext_t ctx */  (*new)->ctx,
129        /* const char *name */ threadName);
130
131    stat = NXThreadCreate(
132        /* NXContext_t context */     (*new)->ctx,
133        /* long flags */              flags,
134        /* NXThreadId_t *thread_id */ &(*new)->td);
135
136    if (stat == 0)
137        return APR_SUCCESS;
138
139    return(stat); /* if error */
140}
141
142apr_os_thread_t apr_os_thread_current()
143{
144    return NXThreadGetId();
145}
146
147int apr_os_thread_equal(apr_os_thread_t tid1, apr_os_thread_t tid2)
148{
149    return (tid1 == tid2);
150}
151
152void apr_thread_yield()
153{
154    NXThreadYield();
155}
156
157apr_status_t apr_thread_exit(apr_thread_t *thd,
158                             apr_status_t retval)
159{
160    thd->exitval = retval;
161    apr_pool_destroy(thd->pool);
162    NXThreadExit(NULL);
163    return APR_SUCCESS;
164}
165
166apr_status_t apr_thread_join(apr_status_t *retval,
167                                          apr_thread_t *thd)
168{
169    apr_status_t  stat;
170    NXThreadId_t dthr;
171
172    if ((stat = NXThreadJoin(thd->td, &dthr, NULL)) == 0) {
173        *retval = thd->exitval;
174        return APR_SUCCESS;
175    }
176    else {
177        return stat;
178    }
179}
180
181apr_status_t apr_thread_detach(apr_thread_t *thd)
182{
183    return APR_SUCCESS;
184}
185
186apr_status_t apr_thread_data_get(void **data, const char *key,
187                                             apr_thread_t *thread)
188{
189    if (thread != NULL) {
190            return apr_pool_userdata_get(data, key, thread->pool);
191    }
192    else {
193        data = NULL;
194        return APR_ENOTHREAD;
195    }
196}
197
198apr_status_t apr_thread_data_set(void *data, const char *key,
199                              apr_status_t (*cleanup) (void *),
200                              apr_thread_t *thread)
201{
202    if (thread != NULL) {
203       return apr_pool_userdata_set(data, key, cleanup, thread->pool);
204    }
205    else {
206        data = NULL;
207        return APR_ENOTHREAD;
208    }
209}
210
211APR_DECLARE(apr_status_t) apr_os_thread_get(apr_os_thread_t **thethd,
212                                            apr_thread_t *thd)
213{
214    if (thd == NULL) {
215        return APR_ENOTHREAD;
216    }
217    *thethd = &(thd->td);
218    return APR_SUCCESS;
219}
220
221APR_DECLARE(apr_status_t) apr_os_thread_put(apr_thread_t **thd,
222                                            apr_os_thread_t *thethd,
223                                            apr_pool_t *pool)
224{
225    if (pool == NULL) {
226        return APR_ENOPOOL;
227    }
228    if ((*thd) == NULL) {
229        (*thd) = (apr_thread_t *)apr_palloc(pool, sizeof(apr_thread_t));
230        (*thd)->pool = pool;
231    }
232    (*thd)->td = *thethd;
233    return APR_SUCCESS;
234}
235
236APR_DECLARE(apr_status_t) apr_thread_once_init(apr_thread_once_t **control,
237                                               apr_pool_t *p)
238{
239    (*control) = apr_pcalloc(p, sizeof(**control));
240    return APR_SUCCESS;
241}
242
243APR_DECLARE(apr_status_t) apr_thread_once(apr_thread_once_t *control,
244                                          void (*func)(void))
245{
246    if (!atomic_xchg(&control->value, 1)) {
247        func();
248    }
249    return APR_SUCCESS;
250}
251
252APR_POOL_IMPLEMENT_ACCESSOR(thread)
253
254
255