diff options
Diffstat (limited to 'man/psmq_publish.3')
| -rw-r--r-- | man/psmq_publish.3 | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/man/psmq_publish.3 b/man/psmq_publish.3 index 4415243..9a86818 100644 --- a/man/psmq_publish.3 +++ b/man/psmq_publish.3 @@ -32,8 +32,11 @@ will be automatically set to 0. .PP If broker's control mqueue is full then this function will block until broker deals with some messages and make place in the queue. -Note that broker never blocks waiting for clients, so messages from mqueue are -processed immediately and without unnecessary delays. +Note that, by default, broker never blocks waiting for clients, so messages +from mqueue are processed immediately and without unnecessary delays. +Broker may block waiting for clients when you set high enough response timeout +value via +.BR psmq_ioctl_reply_timeout (3). .PP Successfull call means that message has been put into broker's queue with success it doesn't necessary mean that any client will receives that message. @@ -56,9 +59,15 @@ share single buffer of size This means topic size + payload size cannot exceed that value. Note, that topic will take strlen(topic) + 1 size on buffer, since topic is string so it will also transmit null terminator char. -This allows for some flexibility, as one message can contain large +This allows for some flexibility, as one message can contain large topic (as in PSMQ_MSG_MAX - 1 large) and no payload, and next publish can be opposite - short topic but large payload. +.PP +Only real data is sent over mqueue, if +.B PSMQ_MSG_MAX +is large like 256 bytes, but topic + payload is 10 bytes long, only +these 10 bytes will be actually copied over to the broker and clients, +not full buffer (256 bytes). .SH "RETURN VALUE" .PP 0 on success. -1 on errors with appropriate errno set. |