summaryrefslogtreecommitdiff
path: root/src/rep.cpp
blob: 5e5e415c47ea901f340976fc8d07349b772fac8c (plain)
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
/*
    Copyright (c) 2009-2012 250bpm s.r.o.
    Copyright (c) 2007-2011 iMatix Corporation
    Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file

    This file is part of Crossroads project.

    Crossroads is free software; you can redistribute it and/or modify it under
    the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    Crossroads 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 program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "rep.hpp"
#include "err.hpp"
#include "msg.hpp"

xs::rep_t::rep_t (class ctx_t *parent_, uint32_t tid_, int sid_) :
    xrep_t (parent_, tid_, sid_),
    sending_reply (false),
    request_begins (true)
{
    options.type = XS_REP;
}

xs::rep_t::~rep_t ()
{
}

int xs::rep_t::xsend (msg_t *msg_, int flags_)
{
    //  If we are in the middle of receiving a request, we cannot send reply.
    if (!sending_reply) {
        errno = EFSM;
        return -1;
    }

    bool more = msg_->flags () & msg_t::more ? true : false;

    //  Push message to the reply pipe.
    int rc = xrep_t::xsend (msg_, flags_);
    if (rc != 0)
        return rc;

    //  If the reply is complete flip the FSM back to request receiving state.
    if (!more)
        sending_reply = false;

    return 0;
}

int xs::rep_t::xrecv (msg_t *msg_, int flags_)
{
    //  If we are in middle of sending a reply, we cannot receive next request.
    if (sending_reply) {
        errno = EFSM;
        return -1;
    }

    //  First thing to do when receiving a request is to copy all the labels
    //  to the reply pipe.
    if (request_begins) {
        while (true) {
            int rc = xrep_t::xrecv (msg_, flags_);
            if (rc != 0)
                return rc;
            xs_assert (msg_->flags () & msg_t::more);
            bool bottom = (msg_->size () == 0);
            rc = xrep_t::xsend (msg_, flags_);
            errno_assert (rc == 0);
            if (bottom)
                break;
        }
        request_begins = false;
    }

    //  Get next message part to return to the user.
    int rc = xrep_t::xrecv (msg_, flags_);
    if (rc != 0)
       return rc;

    //  If whole request is read, flip the FSM to reply-sending state.
    if (!(msg_->flags () & msg_t::more)) {
        sending_reply = true;
        request_begins = true;
    }

    return 0;
}

bool xs::rep_t::xhas_in ()
{
    if (sending_reply)
        return false;

    return xrep_t::xhas_in ();
}

bool xs::rep_t::xhas_out ()
{
    if (!sending_reply)
        return false;

    return xrep_t::xhas_out ();
}

xs::rep_session_t::rep_session_t (poller_base_t *io_thread_, bool connect_,
      socket_base_t *socket_, const options_t &options_,
      const char *protocol_, const char *address_) :
    xrep_session_t (io_thread_, connect_, socket_, options_, protocol_,
        address_)
{
}

xs::rep_session_t::~rep_session_t ()
{
}