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 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

AUTHORS

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