focal (7) zmq_inproc.7.gz

NAME

       zmq_inproc - 0MQ local in-process (inter-thread) communication transport

SYNOPSIS

       The in-process transport passes messages via memory directly between threads sharing a single 0MQ
       context.

           Note
           No I/O threads are involved in passing messages using the inproc transport. Therefore, if you are
           using a 0MQ context for in-process messaging only you can initialise the context with zero I/O
           threads. See zmq_init(3) for details.

ADDRESSING

       A 0MQ endpoint is a string consisting of a transport:// followed by an address. The transport specifies
       the underlying protocol to use. The address specifies the transport-specific address to connect to.

       For the in-process transport, the transport is inproc, and the meaning of the address part is defined
       below.

   Assigning a local address to a socket
       When assigning a local address to a socket using zmq_bind() with the inproc transport, the endpoint shall
       be interpreted as an arbitrary string identifying the name to create. The name must be unique within the
       0MQ context associated with the socket and may be up to 256 characters in length. No other restrictions
       are placed on the format of the name.

   Connecting a socket
       When connecting a socket to a peer address using zmq_connect() with the inproc transport, the endpoint
       shall be interpreted as an arbitrary string identifying the name to connect to. Before version 4.0 he
       name must have been previously created by assigning it to at least one socket within the same 0MQ context
       as the socket being connected. Since version 4.0 the order of zmq_bind() and zmq_connect() does not
       matter just like for the tcp transport type.

EXAMPLES

       Assigning a local address to a socket.

           //  Assign the in-process name "#1"
           rc = zmq_bind(socket, "inproc://#1");
           assert (rc == 0);
           //  Assign the in-process name "my-endpoint"
           rc = zmq_bind(socket, "inproc://my-endpoint");
           assert (rc == 0);

       Connecting a socket.

           //  Connect to the in-process name "#1"
           rc = zmq_connect(socket, "inproc://#1");
           assert (rc == 0);
           //  Connect to the in-process name "my-endpoint"
           rc = zmq_connect(socket, "inproc://my-endpoint");
           assert (rc == 0);

SEE ALSO

       zmq_bind(3) zmq_connect(3) zmq_ipc(7) zmq_tcp(7) zmq_pgm(7) zmq_vmci(7) zmq(7)

AUTHORS

       This page was written by the 0MQ community. To make a change please read the 0MQ Contribution Policy at
       http://www.zeromq.org/docs:contributing.