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Man Pages


Manual Reference Pages  -  ZMQ_CTX_GET (3)

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NAME

zmq_ctx_get - get context options

CONTENTS

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.

    ZMQ_MAX_SOCKETS: Get maximum number of sockets

The ZMQ_MAX_SOCKETS argument returns the maximum number of sockets allowed for this context.

    ZMQ_SOCKET_LIMIT: Get largest configurable number of sockets

The ZMQ_SOCKET_LIMIT argument returns the largest number of sockets that zmq_ctx_set(3) will accept.

    ZMQ_IPV6: Set IPv6 option

The ZMQ_IPV6 argument returns the IPv6 option for the context.

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);

SEE ALSO

zmq_ctx_set(3) zmq(7)

AUTHORS

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

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0MQ 4&.1&.4 ZMQ_CTX_GET (3) 12/18/2015

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