summaryrefslogtreecommitdiff
path: root/src/req.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/req.cpp')
-rw-r--r--src/req.cpp243
1 files changed, 32 insertions, 211 deletions
diff --git a/src/req.cpp b/src/req.cpp
index b900961..74cce66 100644
--- a/src/req.cpp
+++ b/src/req.cpp
@@ -21,129 +21,16 @@
#include "req.hpp"
#include "err.hpp"
-#include "pipe.hpp"
zmq::req_t::req_t (class ctx_t *parent_, uint32_t slot_) :
- socket_base_t (parent_, slot_),
- active (0),
- current (0),
+ xreq_t (parent_, slot_),
receiving_reply (false),
- reply_pipe_active (false),
- more (false),
- reply_pipe (NULL)
+ message_begins (true)
{
- options.requires_in = true;
- options.requires_out = true;
}
zmq::req_t::~req_t ()
{
- zmq_assert (in_pipes.empty ());
- zmq_assert (out_pipes.empty ());
-}
-
-void zmq::req_t::xattach_pipes (reader_t *inpipe_, writer_t *outpipe_,
- const blob_t &peer_identity_)
-{
- zmq_assert (inpipe_ && outpipe_);
- zmq_assert (in_pipes.size () == out_pipes.size ());
-
- inpipe_->set_event_sink (this);
- in_pipes.push_back (inpipe_);
- in_pipes.swap (active, in_pipes.size () - 1);
-
- outpipe_->set_event_sink (this);
- out_pipes.push_back (outpipe_);
- out_pipes.swap (active, out_pipes.size () - 1);
-
- active++;
-}
-
-void zmq::req_t::xterm_pipes ()
-{
- for (in_pipes_t::size_type i = 0; i != in_pipes.size (); i++)
- in_pipes [i]->terminate ();
- for (out_pipes_t::size_type i = 0; i != out_pipes.size (); i++)
- out_pipes [i]->terminate ();
-}
-
-void zmq::req_t::terminated (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?
- if (receiving_reply && pipe_ == reply_pipe) {
- zmq_assert (false);
- }
-
- in_pipes_t::size_type index = in_pipes.index (pipe_);
-
- // ???
- if (!zombie) {
- if (out_pipes [index])
- out_pipes [index]->terminate ();
- out_pipes.erase (index);
- }
-
- in_pipes.erase (index);
-
- if (index < active) {
- active--;
- if (current == active)
- current = 0;
- }
-}
-
-void zmq::req_t::terminated (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 (!zombie) {
- if (in_pipes [index])
- in_pipes [index]->terminate ();
- in_pipes.erase (index);
- }
-
- out_pipes.erase (index);
- if (index < active) {
- active--;
- if (current == active)
- current = 0;
- }
-}
-
-bool zmq::req_t::xhas_pipes ()
-{
- return !in_pipes.empty () || !out_pipes.empty ();
-}
-
-void zmq::req_t::activated (reader_t *pipe_)
-{
- // TODO: Actually, misbehaving peer can cause this kind of thing.
- // Handle it decently, presumably kill the offending connection.
- zmq_assert (pipe_ == reply_pipe);
- reply_pipe_active = true;
-}
-
-void zmq::req_t::activated (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::xsend (zmq_msg_t *msg_, int flags_)
@@ -155,99 +42,58 @@ 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_)) {
- reply_pipe_active = false;
- 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);
}
- // 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;
@@ -255,43 +101,18 @@ 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 2024-11-09 22:52:51 +0000