summaryrefslogtreecommitdiffstats
path: root/rubbos/app/httpd-2.0.64/srclib/apr/threadproc/win32/thread.c
blob: 64317d9b96d8610baa857b759e680e98f5584ca0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
/* 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)