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
*
* Normal IPCP - RIB Manager - CDAP request
*
* Sander Vrijders <sander.vrijders@intec.ugent.be>
* Dimitri Staessens <dimitri.staessens@intec.ugent.be>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <ouroboros/config.h>
#include <ouroboros/time_utils.h>
#include <ouroboros/errno.h>
#include "cdap_request.h"
#include <stdlib.h>
struct cdap_request * cdap_request_create(enum cdap_opcode code,
char * name,
int invoke_id,
struct cdap * instance)
{
struct cdap_request * creq = malloc(sizeof(*creq));
pthread_condattr_t cattr;
if (creq == NULL)
return NULL;
creq->code = code;
creq->name = name;
creq->invoke_id = invoke_id;
creq->instance = instance;
creq->state = REQ_INIT;
creq->result = -1;
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);
INIT_LIST_HEAD(&creq->next);
return creq;
}
void cdap_request_destroy(struct cdap_request * creq)
{
if (creq == NULL)
return;
pthread_mutex_lock(&creq->lock);
if (creq->state == REQ_DESTROY) {
pthread_mutex_unlock(&creq->lock);
return;
}
if (creq->state == REQ_INIT)
creq->state = REQ_DONE;
if (creq->state == REQ_PENDING) {
creq->state = REQ_DESTROY;
pthread_cond_broadcast(&creq->cond);
}
while (creq->state != REQ_DONE)
pthread_cond_wait(&creq->cond, &creq->lock);
pthread_mutex_unlock(&creq->lock);
pthread_cond_destroy(&creq->cond);
pthread_mutex_destroy(&creq->lock);
if (creq->name != NULL)
free(creq->name);
free(creq);
}
int cdap_request_wait(struct cdap_request * creq)
{
struct timespec timeout = {(CDAP_REPLY_TIMEOUT / 1000),
(CDAP_REPLY_TIMEOUT % 1000) * MILLION};
struct timespec abstime;
int ret = -1;
if (creq == NULL)
return -EINVAL;
clock_gettime(CLOCK_REALTIME, &abstime);
ts_add(&abstime, &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) {
if ((ret = -pthread_cond_timedwait(&creq->cond,
&creq->lock,
&abstime)) == -ETIMEDOUT) {
break;
}
}
if (creq->state == REQ_DESTROY)
ret = -1;
creq->state = REQ_DONE;
pthread_cond_broadcast(&creq->cond);
pthread_mutex_unlock(&creq->lock);
return ret;
}
void cdap_request_respond(struct cdap_request * creq,
int response)
{
if (creq == NULL)
return;
pthread_mutex_lock(&creq->lock);
if (creq->state != REQ_PENDING) {
pthread_mutex_unlock(&creq->lock);
return;
}
creq->state = REQ_RESPONSE;
creq->result = response;
pthread_cond_broadcast(&creq->cond);
while (creq->state == REQ_RESPONSE)
pthread_cond_wait(&creq->cond, &creq->lock);
pthread_mutex_unlock(&creq->lock);
}
|
