libzmq/doc/zmq_ctx_get.txt

98 lines
2.3 KiB
Plaintext
Raw Normal View History

zmq_ctx_get(3)
==============
NAME
----
zmq_ctx_get - get context options
SYNOPSIS
--------
*int zmq_ctx_get (void '*context', int 'option_name');*
DESCRIPTION
-----------
The _zmq_ctx_get()_ function shall return the option specified by the
'option_name' argument.
The _zmq_ctx_get()_ function accepts the following option names:
ZMQ_IO_THREADS: Get number of I/O threads
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The 'ZMQ_IO_THREADS' argument returns the size of the 0MQ thread pool
for this context.
2013-01-31 21:52:30 +01:00
ZMQ_MAX_SOCKETS: Get maximum number of sockets
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The 'ZMQ_MAX_SOCKETS' argument returns the maximum number of sockets
allowed for this context.
ZMQ_MAX_MSGSZ: Get maximum message size
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The 'ZMQ_MAX_MSGSZ' argument returns the maximum size of a message
allowed for this context. Default value is INT_MAX.
ZMQ_SOCKET_LIMIT: Get largest configurable number of sockets
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The 'ZMQ_SOCKET_LIMIT' argument returns the largest number of sockets that
linkzmq:zmq_ctx_set[3] will accept.
2013-01-31 21:52:30 +01:00
ZMQ_IPV6: Set IPv6 option
~~~~~~~~~~~~~~~~~~~~~~~~~
The 'ZMQ_IPV6' argument returns the IPv6 option for the context.
ZMQ_BLOCKY: Get blocky setting
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The 'ZMQ_BLOCKY' argument returns 1 if the context will block on terminate,
zero if the "block forever on context termination" gambit was disabled by
setting ZMQ_BLOCKY to false on all new contexts.
RETURN VALUE
------------
The _zmq_ctx_get()_ function returns a value of 0 or greater if successful.
Otherwise it returns `-1` and sets 'errno' to one of the values defined
below.
ERRORS
------
*EINVAL*::
The requested option _option_name_ is unknown.
EXAMPLE
-------
.Setting a limit on the number of sockets
----
void *context = zmq_ctx_new ();
zmq_ctx_set (context, ZMQ_MAX_SOCKETS, 256);
int max_sockets = zmq_ctx_get (context, ZMQ_MAX_SOCKETS);
assert (max_sockets == 256);
----
.Switching off the context deadlock gambit
----
zmq_ctx_set (ctx, ZMQ_BLOCKY, false);
----
SEE ALSO
--------
linkzmq:zmq_ctx_set[3]
linkzmq: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>.