ZMQ_INPROC(7) 0MQ Manual ZMQ_INPROC(7)
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
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0MQ 4.3.4 01/18/2023 ZMQ_INPROC(7)
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