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Diffstat (limited to 'doc/zmq_getsockopt.txt')
| -rw-r--r-- | doc/zmq_getsockopt.txt | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/doc/zmq_getsockopt.txt b/doc/zmq_getsockopt.txt index d179e79..a2677c7 100644 --- a/doc/zmq_getsockopt.txt +++ b/doc/zmq_getsockopt.txt @@ -199,6 +199,36 @@ Default value:: 0 Applicable socket types:: all +ZMQ_FD: Retrieve file descriptor associated with the socket +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_FD' option shall retrieve file descriptor associated with the 0MQ +socket. The descriptor can be used to integrate 0MQ socket into an existing +event loop. It should never be used for anything else than polling -- such as +reading or writing. The descriptor signals edge-triggered IN event when +something has happened within the 0MQ socket. It does not necessarily mean that +the messages can be read or written. Check ZMQ_EVENTS option to find out whether +the 0MQ socket is readable or writeable. + +[horizontal] +Option value type:: int on POSIX systems, SOCKET on Windows +Option value unit:: N/A +Default value:: N/A +Applicable socket types:: all + + +ZMQ_EVENTS: Check whether socket is readable and/or writeable +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The 'ZMQ_EVENTS' option shall retrieve event flags for the specified socket. +If a message can be read from the socket ZMQ_POLLIN flag is set. If message can +be written to the socket ZMQ_POLLOUT flag is set. + +[horizontal] +Option value type:: uint32_t +Option value unit:: N/A (flags) +Default value:: N/A +Applicable socket types:: all + + RETURN VALUE ------------ The _zmq_getsockopt()_ function shall return zero if successful. Otherwise it |