[PATCH] posix: Ignore pshared for semaphores

[Sebastian Huber]

On 12/09/17 15:58, Gedare Bloom wrote:

> On Tue, Sep 12, 2017 at 1:10 AM, Sebastian Huber
> <sebastian.huber at embedded-brains.de> wrote:
>> On 11/09/17 16:03, Sebastian Huber wrote:
>>
>>> ----- Joel Sherrill <joel at rtems.org> schrieb:
>>>> On Fri, Sep 8, 2017 at 1:51 PM, Sebastian Huber <
>>>> sebastian.huber at embedded-brains.de> wrote:
>>>>
>>>>> Ok,  but why do you think that this is an error?  We can share the
>>>>> synchronization objects among processes.
>>>>>
>>>> We don't have processes. How do you propose to share between
>>>> processes when RTEMS is fundamentally a single process system.
>>> Yes, its a single process system. So, it is very easy to support sharing
>>> between processes. Why should creating a process-shared synchronization
>>> object fail only because its impossible to create a second process?
>>>
>> I would like to remove this process-shared error also from the other POSIX
>> synchronization objects:
>>
>> https://devel.rtems.org/ticket/3125
>> https://devel.rtems.org/ticket/3126
>>
> Do these process-shared synch objects work properly when used in a
> single process on *nix?

Yes, this is why I referred to the POSIX mutex documentation:

http://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_mutexattr_getpshared.html

See also follow up (2.9.9 Synchronization Object Copies and Alternative Mappings):

http://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html#tag_15_09_09

Which explicitly mentions semaphores.

-- 
Sebastian Huber, embedded brains GmbH

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