3d1
Subj : Re: returning arguments
To   : comp.programming.threads
From : David Butenhof
Date : Tue Jun 28 2005 02:24 pm

Torsten Robitzki wrote:
> Huub wrote:
> 
>> Is it possible to return more than 1 value from a thread?
> 
> Sure, just use a struct to return what ever you want to.

To (perhaps) make this more clear... technically, there's exactly ONE 
return value from a thread. But the TYPE of that value is "void*" 
(pointer). You can carry any pointer type in that "void* container". On 
most contemporary mainstream systems you can get away with carrying any 
scalar type x with sizeof(x) <= sizeof(void*).

However, it's easy enough to malloc a structure and return a pointer to 
that structure. The joiner can free the storage later.

-- 
Dave Butenhof, David.Butenhof@hp.com
HP Utility Pricing software, POSIX thread consultant
Manageability Solutions Lab (MSL), Hewlett-Packard Company
110 Spit Brook Road, ZK2/3-Q18, Nashua, NH 03062

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