public inbox for
 help / color / mirror / Atom feed
* Request for comment from LEWG
@ 2022-03-28  1:11 Soul Studios
  0 siblings, 0 replies; only message in thread
From: Soul Studios @ 2022-03-28  1:11 UTC (permalink / raw)
  To: libstdc++

Hi all,
was hoping to hear back from Jonathan but haven't so far, so just 
posting here for comment too - this is Matt Bentley.

std::hive (previously: colony) has had a preliminary meeting under LEWG 
- there were a couple of questions raised by the chairs based on the 
concern that the secondary option (memory_use) in the 'hive_priority' 
template parameter might not end up being implemented by implementors, 
which then would get frozen into ABI. They recommended I contact 
yourselves, amongst others.
If someone could get back to me on the following before april 5th (the 
next hive lewg meeting) that'd be appreciated:

a). Would libstdc++ be more likely to use the reference implementation 
(, which has the memory_use 
implemented) or write it's own? The reference is under a zLib license, 
which is compatible with GPL, but as far as I know I could 'grant' a 
version to libstdc++ under the GPL, if this were a problem (the original 
would retain it's zlib license).

b). If libstdc++ were to roll it's own implementation, would the 
memory_use priority be likely to be implemented? In terms of the 
reference implementation, this option merely changes the skipfield type 
from unsigned short to unsigned char - which reduces skipfield memory 
use while limiting maximum block capacities, which in turn limits 
performance above ~500 elements. There are more memory-saving designs 
possible, which are described in the 'Design Decisions' section of the 
but to date I have not tried these, have only indicated that they are 

Thanks in advance-

^ permalink raw reply	[flat|nested] only message in thread

only message in thread, other threads:[~2022-03-28  1:11 UTC | newest]

Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-03-28  1:11 Request for comment from LEWG Soul Studios

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).