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
|
/*
* Ouroboros - Copyright (C) 2016 - 2017
*
* CDAP - CDAP request management
*
* Sander Vrijders <sander.vrijders@intec.ugent.be>
* Dimitri Staessens <dimitri.staessens@intec.ugent.be>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#include <ouroboros/config.h>
#include <ouroboros/time_utils.h>
#include <ouroboros/errno.h>
#include "cdap_req.h"
#include <stdlib.h>
#include <assert.h>
struct cdap_req * cdap_req_create(cdap_key_t key)
{
struct cdap_req * creq = malloc(sizeof(*creq));
pthread_condattr_t cattr;
if (creq == NULL)
return NULL;
creq->key = key;
creq->state = REQ_INIT;
creq->response = -1;
creq->data.data = NULL;
creq->data.len = 0;
pthread_condattr_init(&cattr);
#ifndef __APPLE__
pthread_condattr_setclock(&cattr, PTHREAD_COND_CLOCK);
#endif
pthread_cond_init(&creq->cond, &cattr);
pthread_mutex_init(&creq->lock, NULL);
list_head_init(&creq->next);
clock_gettime(PTHREAD_COND_CLOCK, &creq->birth);
return creq;
}
void cdap_req_destroy(struct cdap_req * creq)
{
assert(creq);
pthread_mutex_lock(&creq->lock);
if (creq->state == REQ_DESTROY) {
pthread_mutex_unlock(&creq->lock);
return;
}
if (creq->state == REQ_INIT)
creq->state = REQ_NULL;
if (creq->state == REQ_PENDING) {
creq->state = REQ_DESTROY;
pthread_cond_broadcast(&creq->cond);
}
while (creq->state != REQ_NULL)
pthread_cond_wait(&creq->cond, &creq->lock);
pthread_mutex_unlock(&creq->lock);
pthread_cond_destroy(&creq->cond);
pthread_mutex_destroy(&creq->lock);
free(creq);
}
int cdap_req_wait(struct cdap_req * creq)
{
struct timespec timeout = {(CDAP_REPLY_TIMEOUT / 1000),
(CDAP_REPLY_TIMEOUT % 1000) * MILLION};
struct timespec abstime;
int ret = -1;
assert(creq);
ts_add(&creq->birth, &timeout, &abstime);
pthread_mutex_lock(&creq->lock);
if (creq->state != REQ_INIT) {
pthread_mutex_unlock(&creq->lock);
return -EINVAL;
}
creq->state = REQ_PENDING;
while (creq->state == REQ_PENDING) {
ret = -pthread_cond_timedwait(&creq->cond,
&creq->lock,
&abstime);
if (ret == -ETIMEDOUT)
break;
}
if (creq->state == REQ_DESTROY) {
ret = -1;
creq->state = REQ_NULL;
pthread_cond_broadcast(&creq->cond);
} else {
creq->state = REQ_DONE;
pthread_cond_broadcast(&creq->cond);
}
pthread_mutex_unlock(&creq->lock);
return ret;
}
void cdap_req_respond(struct cdap_req * creq, int response, buffer_t data)
{
assert(creq);
pthread_mutex_lock(&creq->lock);
if (creq->state != REQ_PENDING) {
pthread_mutex_unlock(&creq->lock);
return;
}
creq->state = REQ_RESPONSE;
creq->response = response;
creq->data = data;
pthread_cond_broadcast(&creq->cond);
while (creq->state == REQ_RESPONSE)
pthread_cond_wait(&creq->cond, &creq->lock);
creq->state = REQ_NULL;
pthread_cond_broadcast(&creq->cond);
pthread_mutex_unlock(&creq->lock);
}
|
