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/*
Copyright (c) 2009-2012 250bpm s.r.o.
Copyright (c) 2007-2009 iMatix Corporation
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 "pair.hpp"
#include "err.hpp"
#include "pipe.hpp"
#include "msg.hpp"
#include "wire.hpp"
xs::pair_t::pair_t (class ctx_t *parent_, uint32_t tid_, int sid_) :
socket_base_t (parent_, tid_, sid_),
pipe (NULL)
{
options.type = XS_PAIR;
options.sp_pattern = SP_PAIR;
options.sp_role = SP_PAIR_PAIR;
options.sp_version = 3;
options.sp_complement = SP_PAIR_PAIR;
}
xs::pair_t::~pair_t ()
{
xs_assert (!pipe);
}
int xs::pair_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 != 2) {
errno = EINVAL;
return -1;
}
options.sp_version = version;
return 0;
}
void xs::pair_t::xattach_pipe (pipe_t *pipe_, bool icanhasall_)
{
xs_assert (pipe_ != NULL);
// XS_PAIR socket can only be connected to a single peer.
// The socket rejects any further connection requests.
if (pipe == NULL)
pipe = pipe_;
else
pipe_->terminate (false);
}
void xs::pair_t::xterminated (pipe_t *pipe_)
{
if (pipe_ == pipe)
pipe = NULL;
}
void xs::pair_t::xread_activated (pipe_t *pipe_)
{
// There's just one pipe. No lists of active and inactive pipes.
// There's nothing to do here.
}
void xs::pair_t::xwrite_activated (pipe_t *pipe_)
{
// There's just one pipe. No lists of active and inactive pipes.
// There's nothing to do here.
}
int xs::pair_t::xsend (msg_t *msg_, int flags_)
{
if (!pipe || !pipe->write (msg_)) {
errno = EAGAIN;
return -1;
}
if (!(flags_ & XS_SNDMORE))
pipe->flush ();
// Detach the original message from the data buffer.
int rc = msg_->init ();
errno_assert (rc == 0);
return 0;
}
int xs::pair_t::xrecv (msg_t *msg_, int flags_)
{
// Deallocate old content of the message.
int rc = msg_->close ();
errno_assert (rc == 0);
if (!pipe || !pipe->read (msg_)) {
// Initialise the output parameter to be a 0-byte message.
rc = msg_->init ();
errno_assert (rc == 0);
errno = EAGAIN;
return -1;
}
return 0;
}
bool xs::pair_t::xhas_in ()
{
if (!pipe)
return false;
return pipe->check_read ();
}
bool xs::pair_t::xhas_out ()
{
if (!pipe)
return false;
msg_t msg;
int rc = msg.init ();
errno_assert (rc == 0);
bool result = pipe->check_write (&msg);
rc = msg.close ();
errno_assert (rc == 0);
return result;
}
xs::pair_session_t::pair_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::pair_session_t::~pair_session_t ()
{
}
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