[zeromq-dev] Alignment of message.raw_data()

Michi Henning michi at triodia.com
Fri Sep 6 06:55:17 CEST 2013


I'm using ZeroMQ with Cap'n Proto, which requires marshaling data to be 
aligned on a 64-bit boundary. However, when I receive a message, like 
this, the returned pointer is only byte-aligned:

zmqpp::message msg_in;
auto data = msg_in.raw_data();
assert((long int)data % 8 ==0);

The assertion fails for me. Checking the pointer value indicates that it 
points one byte past the end of an 8-byte boundary.

Is there any way to ask ZeroMQ to use 64-bit aligned buffers?



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