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82 lines
2.6 KiB
Plaintext
82 lines
2.6 KiB
Plaintext
= zmq_inproc(7)
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== NAME
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zmq_inproc - 0MQ local in-process (inter-thread) communication transport
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== SYNOPSIS
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The in-process transport passes messages via memory directly between threads
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sharing a single 0MQ 'context'.
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NOTE: No I/O threads are involved in passing messages using the 'inproc'
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transport. Therefore, if you are using a 0MQ 'context' for in-process messaging
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only you can initialise the 'context' with zero I/O threads. See
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xref:zmq_init.adoc[zmq_init] for details.
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== ADDRESSING
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A 0MQ endpoint is a string consisting of a 'transport'`://` followed by an
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'address'. The 'transport' specifies the underlying protocol to use. The
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'address' specifies the transport-specific address to connect to.
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For the in-process transport, the transport is `inproc`, and the meaning of
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the 'address' part is defined below.
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Assigning a local address to a socket
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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When assigning a local address to a 'socket' using _zmq_bind()_ with the
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'inproc' transport, the 'endpoint' shall be interpreted as an arbitrary string
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identifying the 'name' to create. The 'name' must be unique within the 0MQ
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'context' associated with the 'socket' and may be up to 256 characters in
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length. No other restrictions are placed on the format of the 'name'.
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Connecting a socket
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~~~~~~~~~~~~~~~~~~~
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When connecting a 'socket' to a peer address using _zmq_connect()_ with the
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'inproc' transport, the 'endpoint' shall be interpreted as an arbitrary string
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identifying the 'name' to connect to. Before version 4.0 he 'name' must have
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been previously created by assigning it to at least one 'socket' within the
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same 0MQ 'context' as the 'socket' being connected. Since version 4.0 the
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order of _zmq_bind()_ and _zmq_connect()_ does not matter just like for the tcp
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transport type.
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== EXAMPLES
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.Assigning a local address to a socket
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----
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// Assign the in-process name "#1"
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rc = zmq_bind(socket, "inproc://#1");
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assert (rc == 0);
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// Assign the in-process name "my-endpoint"
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rc = zmq_bind(socket, "inproc://my-endpoint");
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assert (rc == 0);
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----
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.Connecting a socket
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----
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// Connect to the in-process name "#1"
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rc = zmq_connect(socket, "inproc://#1");
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assert (rc == 0);
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// Connect to the in-process name "my-endpoint"
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rc = zmq_connect(socket, "inproc://my-endpoint");
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assert (rc == 0);
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----
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== SEE ALSO
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* xref:zmq_bind.adoc[zmq_bind]
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* xref:zmq_connect.adoc[zmq_connect]
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* xref:zmq_ipc.adoc[zmq_ipc]
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* xref:zmq_tcp.adoc[zmq_tcp]
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* xref:zmq_pgm.adoc[zmq_pgm]
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* xref:zmq_vmci.adoc[zmq_vmci]
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* xref:zmq.adoc[zmq]
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== AUTHORS
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This page was written by the 0MQ community. To make a change please
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read the 0MQ Contribution Policy at <https://zeromq.org/how-to-contribute/>.
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