Function qpid_proton_sys::pn_messenger_send

pub unsafe extern "C" fn pn_messenger_send(
    messenger: *mut pn_messenger_t, 
    n: i32
) -> i32

Send messages from a messenger's outgoing queue. If a messenger is in blocking mode (see pn_messenger_is_blocking()), this operation will block until N messages have been sent from the outgoing queue. A value of -1 for N means "all messages in the outgoing queue". See below for a full definition of what sent from the outgoing queue means. Any blocking will end once the messenger's configured timeout (if any) has been reached. When this happens an error code of PN_TIMEOUT is returned. If the messenger is in non blocking mode, this call will return an error code of PN_INPROGRESS if it is unable to send the requested number of messages without blocking. A message is considered to be sent from the outgoing queue when its status has been fully determined. This does not necessarily mean the message was successfully sent to the final recipient though, for example of the receiver rejects the message, the final status will be PN_STATUS_REJECTED. Similarly, if a message is sent to an invalid address, it may be removed from the outgoing queue without ever even being transmitted. In this case the final status will be PN_STATUS_ABORTED.