aboutsummaryrefslogtreecommitdiffstats
path: root/locks/unix/thread_cond.c
blob: 3c8e3170a0dcf4908471394851143374fb86a6eb (plain) (blame)
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
/* 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.h"

#if APR_HAS_THREADS

#include "apr_arch_thread_mutex.h"
#include "apr_arch_thread_cond.h"

static apr_status_t thread_cond_cleanup(void *data)
{
    apr_thread_cond_t *cond = (apr_thread_cond_t *)data;
    apr_status_t rv;

    rv = pthread_cond_destroy(&cond->cond);
#ifdef HAVE_ZOS_PTHREADS
    if (rv) {
        rv = errno;
    }
#endif
    return rv;
} 

APR_DECLARE(apr_status_t) apr_thread_cond_create(apr_thread_cond_t **cond,
                                                 apr_pool_t *pool)
{
    apr_thread_cond_t *new_cond;
    apr_status_t rv;

    new_cond = apr_palloc(pool, sizeof(apr_thread_cond_t));

    new_cond->pool = pool;

    if ((rv = pthread_cond_init(&new_cond->cond, NULL))) {
#ifdef HAVE_ZOS_PTHREADS
        rv = errno;
#endif
        return rv;
    }

    apr_pool_cleanup_register(new_cond->pool,
                              (void *)new_cond, thread_cond_cleanup,
                              apr_pool_cleanup_null);

    *cond = new_cond;
    return APR_SUCCESS;
}

APR_DECLARE(apr_status_t) apr_thread_cond_wait(apr_thread_cond_t *cond,
                                               apr_thread_mutex_t *mutex)
{
    apr_status_t rv;

    rv = pthread_cond_wait(&cond->cond, &mutex->mutex);
#ifdef HAVE_ZOS_PTHREADS
    if (rv) {
        rv = errno;
    }
#endif
    return rv;
}

APR_DECLARE(apr_status_t) apr_thread_cond_timedwait(apr_thread_cond_t *cond,
                                                    apr_thread_mutex_t *mutex,
                                                    apr_interval_time_t timeout)
{
    apr_status_t rv;
    if (timeout < 0) {
        rv = pthread_cond_wait(&cond->cond, &mutex->mutex);
#ifdef HAVE_ZOS_PTHREADS
        if (rv) {
            rv = errno;
        }
#endif
    }
    else {
        apr_time_t then;
        struct timespec abstime;

        then = apr_time_now() + timeout;
        abstime.tv_sec = apr_time_sec(then);
        abstime.tv_nsec = apr_time_usec(then) * 1000; /* nanoseconds */

        rv = pthread_cond_timedwait(&cond->cond, &mutex->mutex, &abstime);
#ifdef HAVE_ZOS_PTHREADS
        if (rv) {
            rv = errno;
        }
#endif
        if (ETIMEDOUT == rv) {
            return APR_TIMEUP;
        }
    }
    return rv;
}


APR_DECLARE(apr_status_t) apr_thread_cond_signal(apr_thread_cond_t *cond)
{
    apr_status_t rv;

    rv = pthread_cond_signal(&cond->cond);
#ifdef HAVE_ZOS_PTHREADS
    if (rv) {
        rv = errno;
    }
#endif
    return rv;
}

APR_DECLARE(apr_status_t) apr_thread_cond_broadcast(apr_thread_cond_t *cond)
{
    apr_status_t rv;

    rv = pthread_cond_broadcast(&cond->cond);
#ifdef HAVE_ZOS_PTHREADS
    if (rv) {
        rv = errno;
    }
#endif
    return rv;
}

APR_DECLARE(apr_status_t) apr_thread_cond_destroy(apr_thread_cond_t *cond)
{
    return apr_pool_cleanup_run(cond->pool, cond, thread_cond_cleanup);
}

APR_POOL_IMPLEMENT_ACCESSOR(thread_cond)

#endif /* APR_HAS_THREADS */