Message Passing Call Variants

QNX USERS QNX6 - OS
1

There seems to be a frightful number (12) of MsgSend…() variants, and I can’t find a number of the differences mentioned in the documentation.
I know that ‘v’ means that the variant uses iov_t parts, that nc means “No Cancellation” and that _r provides a different way to get a return code, however there is are sv and vs variants that look identical to the v variant.

Does anyone know the difference?

2

SV:

int MsgSendsv( int coid,
const void* smsg,
int sbytes,
const iov_t* riov,
int rparts );

V:

int MsgSendv( int coid,
const iov_t* siov,
int sparts,
const iov_t* riov,
int rparts );

Notice the difference? ;-)

3

Yes, I think some of the documentation I have must be wrong, because two of the descriptions were identical. This clears up the matter, thanks.

4

I looked at the 6.3 doc. You are welcome!