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/*
Copyright (c) 2009-2012 250bpm s.r.o.
Copyright (c) 2011 VMware, Inc.
Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file
This file is part of Crossroads I/O project.
Crossroads I/O 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 "xreq.hpp"
#include "err.hpp"
#include "msg.hpp"
#include "wire.hpp"
xs::xreq_t::xreq_t (class ctx_t *parent_, uint32_t tid_, int sid_) :
socket_base_t (parent_, tid_, sid_),
prefetched (false)
{
options.type = XS_XREQ;
options.sp_pattern = SP_REQREP;
options.sp_version = 2;
options.sp_role = SP_REQREP_REQ;
options.sp_complement = SP_REQREP_REP;
// TODO: Uncomment the following line when XREQ will become true XREQ
// rather than generic dealer socket.
// If the socket is closing we can drop all the outbound requests. There'll
// be noone to receive the replies anyway.
// options.delay_on_close = false;
options.send_identity = true;
options.recv_identity = true;
prefetched_msg.init ();
}
xs::xreq_t::~xreq_t ()
{
prefetched_msg.close ();
}
int xs::xreq_t::xsetsockopt (int option_, const void *optval_,
size_t optvallen_)
{
if (option_ != XS_PATTERN_VERSION) {
errno = EINVAL;
return -1;
}
if (optvallen_ != sizeof (int)) {
errno = EINVAL;
return -1;
}
if (!optval_) {
errno = EFAULT;
return -1;
}
int version = *(int *) optval_;
if (version != 1) {
errno = EINVAL;
return -1;
}
options.sp_version = version;
return 0;
}
void xs::xreq_t::xattach_pipe (pipe_t *pipe_, bool icanhasall_)
{
xs_assert (pipe_);
fq.attach (pipe_);
lb.attach (pipe_);
}
int xs::xreq_t::xsend (msg_t *msg_, int flags_)
{
return lb.send (msg_, flags_);
}
int xs::xreq_t::xrecv (msg_t *msg_, int flags_)
{
// If there is a prefetched message, return it.
if (prefetched) {
int rc = msg_->move (prefetched_msg);
errno_assert (rc == 0);
prefetched = false;
return 0;
}
// XREQ socket doesn't use identities. We can safely drop them.
while (true) {
int rc = fq.recv (msg_, flags_);
if (rc != 0)
return rc;
if (likely (!(msg_->flags () & msg_t::identity)))
break;
}
return 0;
}
bool xs::xreq_t::xhas_in ()
{
// We may already have a message pre-fetched.
if (prefetched)
return true;
// Try to read the next message to the pre-fetch buffer.
int rc = xreq_t::xrecv (&prefetched_msg, XS_DONTWAIT);
if (rc != 0 && errno == EAGAIN)
return false;
xs_assert (rc == 0);
prefetched = true;
return true;
}
bool xs::xreq_t::xhas_out ()
{
return lb.has_out ();
}
void xs::xreq_t::xread_activated (pipe_t *pipe_)
{
fq.activated (pipe_);
}
void xs::xreq_t::xwrite_activated (pipe_t *pipe_)
{
lb.activated (pipe_);
}
void xs::xreq_t::xterminated (pipe_t *pipe_)
{
fq.terminated (pipe_);
lb.terminated (pipe_);
}
xs::xreq_session_t::xreq_session_t (io_thread_t *io_thread_, bool connect_,
socket_base_t *socket_, const options_t &options_,
const char *protocol_, const char *address_) :
session_base_t (io_thread_, connect_, socket_, options_, protocol_,
address_)
{
}
xs::xreq_session_t::~xreq_session_t ()
{
}
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