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
19#if APR_HAS_THREADS
20
21#include "apr_arch_thread_mutex.h"
22#include "apr_arch_thread_cond.h"
23
24static apr_status_t thread_cond_cleanup(void *data)
25{
26    apr_thread_cond_t *cond = (apr_thread_cond_t *)data;
27    apr_status_t rv;
28
29    rv = pthread_cond_destroy(&cond->cond);
30#ifdef HAVE_ZOS_PTHREADS
31    if (rv) {
32        rv = errno;
33    }
34#endif
35    return rv;
36}
37
38APR_DECLARE(apr_status_t) apr_thread_cond_create(apr_thread_cond_t **cond,
39                                                 apr_pool_t *pool)
40{
41    apr_thread_cond_t *new_cond;
42    apr_status_t rv;
43
44    new_cond = apr_palloc(pool, sizeof(apr_thread_cond_t));
45
46    new_cond->pool = pool;
47
48    if ((rv = pthread_cond_init(&new_cond->cond, NULL))) {
49#ifdef HAVE_ZOS_PTHREADS
50        rv = errno;
51#endif
52        return rv;
53    }
54
55    apr_pool_cleanup_register(new_cond->pool,
56                              (void *)new_cond, thread_cond_cleanup,
57                              apr_pool_cleanup_null);
58
59    *cond = new_cond;
60    return APR_SUCCESS;
61}
62
63APR_DECLARE(apr_status_t) apr_thread_cond_wait(apr_thread_cond_t *cond,
64                                               apr_thread_mutex_t *mutex)
65{
66    apr_status_t rv;
67
68    rv = pthread_cond_wait(&cond->cond, &mutex->mutex);
69#ifdef HAVE_ZOS_PTHREADS
70    if (rv) {
71        rv = errno;
72    }
73#endif
74    return rv;
75}
76
77APR_DECLARE(apr_status_t) apr_thread_cond_timedwait(apr_thread_cond_t *cond,
78                                                    apr_thread_mutex_t *mutex,
79                                                    apr_interval_time_t timeout)
80{
81    apr_status_t rv;
82    if (timeout < 0) {
83        rv = pthread_cond_wait(&cond->cond, &mutex->mutex);
84#ifdef HAVE_ZOS_PTHREADS
85        if (rv) {
86            rv = errno;
87        }
88#endif
89    }
90    else {
91        apr_time_t then;
92        struct timespec abstime;
93
94        then = apr_time_now() + timeout;
95        abstime.tv_sec = apr_time_sec(then);
96        abstime.tv_nsec = apr_time_usec(then) * 1000; /* nanoseconds */
97
98        rv = pthread_cond_timedwait(&cond->cond, &mutex->mutex, &abstime);
99#ifdef HAVE_ZOS_PTHREADS
100        if (rv) {
101            rv = errno;
102        }
103#endif
104        if (ETIMEDOUT == rv) {
105            return APR_TIMEUP;
106        }
107    }
108    return rv;
109}
110
111
112APR_DECLARE(apr_status_t) apr_thread_cond_signal(apr_thread_cond_t *cond)
113{
114    apr_status_t rv;
115
116    rv = pthread_cond_signal(&cond->cond);
117#ifdef HAVE_ZOS_PTHREADS
118    if (rv) {
119        rv = errno;
120    }
121#endif
122    return rv;
123}
124
125APR_DECLARE(apr_status_t) apr_thread_cond_broadcast(apr_thread_cond_t *cond)
126{
127    apr_status_t rv;
128
129    rv = pthread_cond_broadcast(&cond->cond);
130#ifdef HAVE_ZOS_PTHREADS
131    if (rv) {
132        rv = errno;
133    }
134#endif
135    return rv;
136}
137
138APR_DECLARE(apr_status_t) apr_thread_cond_destroy(apr_thread_cond_t *cond)
139{
140    return apr_pool_cleanup_run(cond->pool, cond, thread_cond_cleanup);
141}
142
143APR_POOL_IMPLEMENT_ACCESSOR(thread_cond)
144
145#endif /* APR_HAS_THREADS */
146