Concurrency Kit and Epoch Based Reclamation

[Sebastian Huber]

----- Am 4. Sep 2018 um 18:07 schrieb Gedare Bloom gedare at rtems.org:

> On Tue, Sep 4, 2018 at 9:58 AM, Joel Sherrill <joel at rtems.org> wrote:
>>
>>
>> On Tue, Sep 4, 2018 at 12:59 AM Sebastian Huber
>> <sebastian.huber at embedded-brains.de> wrote:
>>>
>>> On 03/09/18 11:35, Sebastian Huber wrote:
>>> > Hello,
>>> >
>>> > I have now a prototype implementation of the FreeBSD epoch memory
>>> > reclamation API:
>>> >
>>> > https://github.com/freebsd/freebsd/blob/master/share/man/man9/epoch.9
>>> >
>>> > I think it would be a nice feature for RTEMS SMP in general. One
>>> > option would be to integrate it in RTEMS instead of libbsd. This would
>>> > require an import of Concurrency Kit to RTEMS:
>>> >
>>> > https://github.com/concurrencykit/ck
>>> >
>>> > Concurrency Kit lacks support for C++ and needs probably some changes
>>> > to work well in uni-processor setups. So, it would need some changes
>>> > for RTEMS. What do you think?
>>
>>
>> The license has a BSD-style advertising clause.
>>
>> Redistribution and use in source and binary forms, with or without
>> modification, are permitted provided that the following conditions
>> are met:
>> 1. Redistributions of source code must retain the above copyright
>>    notice, this list of conditions and the following disclaimer.
>> 2. Redistributions in binary form must reproduce the above copyright
>>    notice, this list of conditions and the following disclaimer in the
>>    documentation and/or other materials provided with the distribution.
>>
>> Is condition #2 ok for inclusion in RTEMS?
>>
> This looks to be normal 2-clause BSD?

Yes, this is the normal BSD-2-Clause license. The advertising clause is:

https://spdx.org/licenses/BSD-4-Clause.html

"All advertising materials mentioning features or use of this software must display the following acknowledgement:
This product includes software developed by the organization."

The CK includes two additional licenses:

https://github.com/concurrencykit/ck/blob/master/LICENSE

You can find the FreeBSD import here:

https://github.com/freebsd/freebsd/tree/master/sys/contrib/ck

The CK contains a comprehensive test suite (113 test programs).