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
|
/*
* Copyright 2016 Garrett D'Amore <garrett@damore.org>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include "core/nng_impl.h"
/*
* Socket implementation.
*/
struct nng_socket {
nni_mutex_t s_mx;
nni_msgqueue_t s_uwq; /* Upper write queue. */
nni_msgqueue_t s_urq; /* Upper read queue. */
struct nni_protocol s_ops;
void *s_data; /* Protocol private. */
/* options */
/* pipes */
/* endpoints */
int s_besteffort; /* Best effort mode delivery. */
int s_senderr; /* Protocol state machine use. */
};
/*
* nni_socket_sendq and nni_socket_recvq are called by the protocol to obtain
* the upper read and write queues.
*/
nni_msgqueue_t
nni_socket_sendq(nng_socket_t s)
{
return (s->s_uwq);
}
nni_msgqueue_t
nni_socket_recvq(nng_socket_t s)
{
return (s->s_urq);
}
int
nng_socket_create(nng_socket_t *sockp, uint16_t proto)
{
nng_socket_t sock;
struct nni_protocol *ops;
int rv;
if ((ops = nni_protocol_find(proto)) == NULL) {
return (NNG_ENOTSUP);
}
if ((sock = nni_alloc(sizeof (*sock))) == NULL) {
return (NNG_ENOMEM);
}
sock->s_ops = *ops;
if ((rv = sock->s_ops.proto_create(&sock->s_data, sock)) != 0) {
nni_free(sock, sizeof (*sock));
return (rv);
}
*sockp = sock;
return (0);
}
int
nng_socket_close(nng_socket_t sock)
{
nni_msgqueue_close(sock->s_urq);
/* XXX: drain this? */
nni_msgqueue_close(sock->s_uwq);
/* XXX: close endpoints - no new pipes made... */
/* XXX: protocol shutdown */
/* XXX: close remaining pipes */
/* XXX: wait for workers to cease activity */
return (0);
}
int
nng_socket_sendmsg(nng_socket_t sock, nng_msg_t msg, int tmout)
{
int rv;
int besteffort;
/*
* Senderr is typically set by protocols when the state machine
* indicates that it is no longer valid to send a message. E.g.
* a REP socket with no REQ pending.
*/
nni_mutex_enter(sock->s_mx);
if ((rv = sock->s_senderr) != 0) {
nni_mutex_exit(sock->s_mx);
return (rv);
}
besteffort = sock->s_besteffort;
nni_mutex_exit(sock->s_mx);
#if 0
if (s.ops.p_sendhook != NULL) {
if ((rv = s.ops.p_sendhook(sock->s_proto, msg)) != 0) {
nng_msg_free(msg);
return (0);
}
}
#endif
if (besteffort) {
/*
* BestEffort mode -- if we cannot handle the message due to
* backpressure, we just throw it away, and don't complain.
*/
tmout = 0;
}
rv = nni_msgqueue_put(sock->s_uwq, msg, tmout);
if (besteffort && (rv == NNG_EAGAIN)) {
/* Pretend this worked... it didn't, but pretend. */
nng_msg_free(msg);
return (0);
}
return (rv);
}
uint16_t
nng_socket_protocol(nng_socket_t sock)
{
return (sock->s_ops.proto_self);
}
|
