[zeromq-dev] Feature request: "transmit size" on zmq_msg_t packets
mattweinstein at gmail.com
Thu Jun 24 02:28:29 CEST 2010
I'm reading variable length records directly from a MYSQL database,
with a defined "max field length" into a dynamically allocated
zmq_msg_t buffer, whose size must be the max field length.
However, I need to send just the characters I retrieved from the
database, not the full buffer, otherwise I must figure out how to send
the data field size to the distant end, or at least I must:
1) null the unused portion of the buffer; or
2) copy to a smaller zmq_msg_t.
Both of these require fill or copy operations :-(
What I'd like is to be able to set the "transmit size" of the packet
to a different value, e.g.
Only transmit_size bytes would be sent to the distant host, and a
zmq_msg of that size would be received.
This would not change the size of the underlying buffer, and could be
reset to a different N between 0<=N<=zmq_msg_size(&msg) at any time
until it was in transit.
Any thoughts as to whether this would be generally worthwhile, and how
deeply the size is ingrained within the code layers?
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