[M3devel] atomics questions

[Jay K]

loophole allows for union, right?

I know there is widechar, point was, if some hypothetical platform without atomic widechar.

 

 - Jay

 


From: hosking at cs.purdue.edu
Date: Thu, 11 Feb 2010 11:53:24 -0500
To: jay.krell at cornell.edu
CC: m3devel at elegosoft.com
Subject: Re: [M3devel] atomics questions




On 11 Feb 2010, at 07:11, Jay K wrote:


What if some atomic operations aren't available?
 
 
If none are available, then they can all fallback to one giant lock.
 



Correct.


 
But what if some are and some aren't?








A lock per type?



Yes.  Definitely.  No unions in M3.


 
That fails with like
 union {
  short s[2];
  int i;
} u;
 
 
and platform has atomic int but not atomic short.


We do have atomic WIDECHARl



 
 
 - Jay


 		 	   		  
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