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_shm.h"
18 #include "apr_errno.h"
19 #include "apr_general.h"
20 #include "apr_lib.h"
21 #include "apr_strings.h"
22 #include "apr_time.h"
23 #include "testshm.h"
24 #include "apr.h"
25
26 #if APR_HAVE_STDLIB_H
27 #include <stdlib.h>
28 #endif
29
30
31 #if APR_HAS_SHARED_MEMORY
msgput(int boxnum,char * msg)32 static void msgput(int boxnum, char *msg)
33 {
34 apr_cpystrn(boxes[boxnum].msg, msg, strlen(msg) + 1);
35 boxes[boxnum].msgavail = 1;
36 }
37
main(void)38 int main(void)
39 {
40 apr_status_t rv;
41 apr_pool_t *pool;
42 apr_shm_t *shm;
43 int i;
44 int sent = 0;
45
46 apr_initialize();
47
48 if (apr_pool_create(&pool, NULL) != APR_SUCCESS) {
49 exit(-1);
50 }
51
52 rv = apr_shm_attach(&shm, SHARED_FILENAME, pool);
53 if (rv != APR_SUCCESS) {
54 exit(-2);
55 }
56
57 boxes = apr_shm_baseaddr_get(shm);
58
59 /* produce messages on all of the boxes, in descending order,
60 * Yes, we could just return N_BOXES, but I want to have a double-check
61 * in this code. The original code actually sent N_BOXES - 1 messages,
62 * so rather than rely on possibly buggy code, this way we know that we
63 * are returning the right number.
64 */
65 for (i = N_BOXES - 1, sent = 0; i >= 0; i--, sent++) {
66 msgput(i, MSG);
67 apr_sleep(apr_time_from_sec(1));
68 }
69
70 rv = apr_shm_detach(shm);
71 if (rv != APR_SUCCESS) {
72 exit(-3);
73 }
74
75 return sent;
76 }
77
78 #else /* APR_HAS_SHARED_MEMORY */
79
main(void)80 int main(void)
81 {
82 /* Just return, this program will never be launched, so there is no
83 * reason to print a message.
84 */
85 return 0;
86 }
87
88 #endif /* APR_HAS_SHARED_MEMORY */
89
90