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.

  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

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