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-rw-r--r--src/req.cpp243
1 files changed, 40 insertions, 203 deletions
diff --git a/src/req.cpp b/src/req.cpp
index a77c061..f495492 100644
--- a/src/req.cpp
+++ b/src/req.cpp
@@ -1,19 +1,20 @@
/*
- Copyright (c) 2007-2010 iMatix Corporation
+ Copyright (c) 2007-2011 iMatix Corporation
+ Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file
This file is part of 0MQ.
0MQ is free software; you can redistribute it and/or modify it under
- the terms of the Lesser GNU General Public License as published by
+ 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.
0MQ 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
- Lesser GNU General Public License for more details.
+ GNU Lesser General Public License for more details.
- You should have received a copy of the Lesser GNU General Public License
+ 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/>.
*/
@@ -21,119 +22,19 @@
#include "req.hpp"
#include "err.hpp"
-#include "pipe.hpp"
-zmq::req_t::req_t (class app_thread_t *parent_) :
- socket_base_t (parent_),
- active (0),
- current (0),
+zmq::req_t::req_t (class ctx_t *parent_, uint32_t tid_) :
+ xreq_t (parent_, tid_),
receiving_reply (false),
- reply_pipe_active (false),
- more (false),
- reply_pipe (NULL)
+ message_begins (true)
{
- options.requires_in = true;
- options.requires_out = true;
+ options.type = ZMQ_REQ;
}
zmq::req_t::~req_t ()
{
}
-void zmq::req_t::xattach_pipes (class reader_t *inpipe_,
- class writer_t *outpipe_, const blob_t &peer_identity_)
-{
- zmq_assert (inpipe_ && outpipe_);
- zmq_assert (in_pipes.size () == out_pipes.size ());
-
- in_pipes.push_back (inpipe_);
- in_pipes.swap (active, in_pipes.size () - 1);
-
- out_pipes.push_back (outpipe_);
- out_pipes.swap (active, out_pipes.size () - 1);
-
- active++;
-}
-
-void zmq::req_t::xdetach_inpipe (class reader_t *pipe_)
-{
- zmq_assert (!receiving_reply || !more || reply_pipe != pipe_);
-
- zmq_assert (pipe_);
- zmq_assert (in_pipes.size () == out_pipes.size ());
-
- // TODO: The pipe we are awaiting the reply from is detached. What now?
- // Return ECONNRESET from subsequent recv?
- if (receiving_reply && pipe_ == reply_pipe) {
- zmq_assert (false);
- }
-
- in_pipes_t::size_type index = in_pipes.index (pipe_);
-
- if (out_pipes [index])
- out_pipes [index]->term ();
- in_pipes.erase (index);
- out_pipes.erase (index);
- if (index < active) {
- active--;
- if (current == active)
- current = 0;
- }
-}
-
-void zmq::req_t::xdetach_outpipe (class writer_t *pipe_)
-{
- zmq_assert (receiving_reply || !more || out_pipes [current] != pipe_);
-
- zmq_assert (pipe_);
- zmq_assert (in_pipes.size () == out_pipes.size ());
-
- out_pipes_t::size_type index = out_pipes.index (pipe_);
-
- if (in_pipes [index])
- in_pipes [index]->term ();
- in_pipes.erase (index);
- out_pipes.erase (index);
- if (index < active) {
- active--;
- if (current == active)
- current = 0;
- }
-}
-
-void zmq::req_t::xkill (class reader_t *pipe_)
-{
- zmq_assert (receiving_reply);
- zmq_assert (pipe_ == reply_pipe);
-
- reply_pipe_active = false;
-}
-
-void zmq::req_t::xrevive (class reader_t *pipe_)
-{
- if (pipe_ == reply_pipe)
- reply_pipe_active = true;
-}
-
-void zmq::req_t::xrevive (class writer_t *pipe_)
-{
- out_pipes_t::size_type index = out_pipes.index (pipe_);
- zmq_assert (index >= active);
-
- if (in_pipes [index] != NULL) {
- in_pipes.swap (index, active);
- out_pipes.swap (index, active);
- active++;
- }
-}
-
-int zmq::req_t::xsetsockopt (int option_, const void *optval_,
- size_t optvallen_)
-{
- errno = EINVAL;
- return -1;
-}
-
int zmq::req_t::xsend (zmq_msg_t *msg_, int flags_)
{
// If we've sent a request and we still haven't got the reply,
@@ -143,98 +44,59 @@ int zmq::req_t::xsend (zmq_msg_t *msg_, int flags_)
return -1;
}
- while (active > 0) {
- if (out_pipes [current]->check_write ())
- break;
-
- zmq_assert (!more);
- active--;
- if (current < active) {
- in_pipes.swap (current, active);
- out_pipes.swap (current, active);
- }
- else
- current = 0;
- }
-
- if (active == 0) {
- errno = EAGAIN;
- return -1;
- }
-
- // If we are starting to send the request, generate a prefix.
- if (!more) {
+ // First part of the request is empty message part (stack bottom).
+ if (message_begins) {
zmq_msg_t prefix;
int rc = zmq_msg_init (&prefix);
zmq_assert (rc == 0);
- prefix.flags |= ZMQ_MSG_MORE;
- bool written = out_pipes [current]->write (&prefix);
- zmq_assert (written);
+ prefix.flags = ZMQ_MSG_MORE;
+ rc = xreq_t::xsend (&prefix, flags_);
+ if (rc != 0)
+ return rc;
+ message_begins = false;
}
- // Push the message to the selected pipe.
- bool written = out_pipes [current]->write (msg_);
- zmq_assert (written);
- more = msg_->flags & ZMQ_MSG_MORE;
- if (!more) {
- out_pipes [current]->flush ();
- receiving_reply = true;
- reply_pipe = in_pipes [current];
+ bool more = msg_->flags & ZMQ_MSG_MORE;
- // We can safely assume that the reply pipe is active as the last time
- // we've used it we've read the reply and haven't tried to read from it
- // anymore.
- reply_pipe_active = true;
+ int rc = xreq_t::xsend (msg_, flags_);
+ if (rc != 0)
+ return rc;
- // Move to the next pipe (load-balancing).
- current = (current + 1) % active;
+ // If the request was fully sent, flip the FSM into reply-receiving state.
+ if (!more) {
+ receiving_reply = true;
+ message_begins = true;
}
- // Detach the message from the data buffer.
- int rc = zmq_msg_init (msg_);
- zmq_assert (rc == 0);
-
return 0;
}
int zmq::req_t::xrecv (zmq_msg_t *msg_, int flags_)
{
- // Deallocate old content of the message.
- int rc = zmq_msg_close (msg_);
- zmq_assert (rc == 0);
-
// If request wasn't send, we can't wait for reply.
if (!receiving_reply) {
- zmq_msg_init (msg_);
errno = EFSM;
return -1;
}
- // Get the reply from the reply pipe.
- if (!reply_pipe_active || !reply_pipe->read (msg_)) {
- zmq_msg_init (msg_);
- errno = EAGAIN;
- return -1;
- }
-
- // If we are starting to receive new reply, check whether prefix
- // is well-formed and drop it.
- if (!more) {
+ // First part of the reply should be empty message part (stack bottom).
+ if (message_begins) {
+ int rc = xreq_t::xrecv (msg_, flags_);
+ if (rc != 0)
+ return rc;
zmq_assert (msg_->flags & ZMQ_MSG_MORE);
zmq_assert (zmq_msg_size (msg_) == 0);
- rc = zmq_msg_close (msg_);
- zmq_assert (rc == 0);
-
- // Get the actual reply.
- bool recvd = reply_pipe->read (msg_);
- zmq_assert (recvd);
+ message_begins = false;
}
- // If this was last part of the reply, switch to request phase.
- more = msg_->flags & ZMQ_MSG_MORE;
- if (!more) {
+ int rc = xreq_t::xrecv (msg_, flags_);
+ if (rc != 0)
+ return rc;
+
+ // If the reply is fully received, flip the FSM into request-sending state.
+ if (!(msg_->flags & ZMQ_MSG_MORE)) {
receiving_reply = false;
- reply_pipe = NULL;
+ message_begins = true;
}
return 0;
@@ -242,43 +104,18 @@ int zmq::req_t::xrecv (zmq_msg_t *msg_, int flags_)
bool zmq::req_t::xhas_in ()
{
- if (receiving_reply && more)
- return true;
-
- if (!receiving_reply || !reply_pipe_active)
- return false;
-
- zmq_assert (reply_pipe);
- if (!reply_pipe->check_read ()) {
- reply_pipe_active = false;
+ if (!receiving_reply)
return false;
- }
- return true;
+ return xreq_t::xhas_in ();
}
bool zmq::req_t::xhas_out ()
{
- if (!receiving_reply && more)
- return true;
-
if (receiving_reply)
return false;
- while (active > 0) {
- if (out_pipes [current]->check_write ())
- return true;;
-
- active--;
- if (current < active) {
- in_pipes.swap (current, active);
- out_pipes.swap (current, active);
- }
- else
- current = 0;
- }
-
- return false;
+ return xreq_t::xhas_out ();
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 12:29:52 +0000