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+xs_setctxopt(3)
+===============
+
+
+NAME
+----
+
+xs_setctxopt - set Crossroads context options
+
+
+SYNOPSIS
+--------
+*int xs_setctxopt (void '*context', int 'option_name', const void '*option_value', size_t 'option_len');*
+
+Caution: All options take effect only if set prior to creating the first socket.
+
+DESCRIPTION
+-----------
+The _xs_setctxopt()_ function shall set the option specified by the
+'option_name' argument to the value pointed to by the 'option_value' argument
+for the Crossroads context pointed to by the 'context' argument.
+The 'option_len' argument is the size of the option value in bytes.
+
+The following options can be set with the _xs_setctxopt()_ function:
+
+
+XS_CTX_MAX_SOCKETS: Set maximum number of sockets
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+The 'XS_CTX_MAX_SOCKETS' option shall set specify the maximum nuber of sockets
+that can be open at the same time.
+
+[horizontal]
+Option value type:: int
+Option value unit:: sockets
+Default value:: 512
+
+RETURN VALUE
+------------
+The _xs_setctxopt()_ function shall return zero if successful. Otherwise it
+shall return `-1` and set 'errno' to one of the values defined below.
+
+
+ERRORS
+------
+*EINVAL*::
+The requested option _option_name_ is unknown, or the requested _option_len_ or
+_option_value_ is invalid.
+*EFAULT*::
+The provided 'context' was invalid.
+
+EXAMPLE
+-------
+.Setting maximal number of sockets to three.
+----
+int val = 3;
+rc = xs_setctxopt (context, XS_CTX_MAX_SOCKETS, &val, sizeof (val));
+assert (rc == 0);
+----
+
+SEE ALSO
+--------
+linkxs:xs_getsockopt[3]
+linkxs:xs_setsockopt[3]
+linkxs:xs_init[3]
+linkxs:xs[7]
+
+
+AUTHORS
+-------
+This manual page was written by Martin Sustrik <sustrik@250bpm.com>.