Hi, all:
I submitted a PR regarding mutex, the changes are as follows: 1. Move some
mutex operations to sched;2. Add mutex_clocklock, mutex_set_protocol, and
mutex_get_protocol interfaces;3. Remove cancellation point operations in mutex
because it is not a cancellation point.
In addition, there
On 3/30/2023 1:57 AM, 奇诺 wrote:
Hi, all:
I submitted a PR regarding mutex, the changes are as follows: 1. Move some
mutex operations to sched;2. Add mutex_clocklock, mutex_set_protocol, and
mutex_get_protocol interfaces;3. Remove cancellation point operations in mutex
because it is not a cance
3. Move priority inheritance from nxsem to nxmutex, and optimize the
performance of priority inheritance;
That will break every a lot of people's code. There is probably a lot
of application logic that depends on priority inheritance working on
counting semaphores. Removing that will prob
On Thu, Mar 30, 2023 at 9:49 AM Gregory Nutt wrote:
>
> >> 3. Move priority inheritance from nxsem to nxmutex, and optimize the
> >> performance of priority inheritance;
> >
> > That will break every a lot of people's code. There is probably a lot
> > of application logic that depends on priorit
All,
In his Confluence paper on "Signaling Semaphores and Priority Inheritance”,
Brennan Ashton’s analysis is both thorough and accurate; and his conclusion that
There should then be no priority inheritance operations on this semaphore that
is used for signalling.
is unassailable.
It’s impor
I have mixed feelings myself and hope that we get some consensus through
dialog. One one hand, it is important to stay faithful to documented
standard and undocumented conventions for the use the a POSIX/Unix
systems. But on the other hand, unlike other OSs that strive toward
standard conforma
> In his Confluence paper on "Signaling Semaphores and Priority
Inheritance”, Brennan Ashton’s analysis is both thorough and accurate; ...
Minor fix. I wrote the paper, Brennan converted the Confluence page
from an older DocuWiki page
> In any RTOS, priority inversion happens, and it’s OK, a
>My opinion is that we have to respect the requirements for deterministic
>real-time behavior, even though that implies the addition of certain
>non-standard interfaces. Otherwise we lose our identity as a real time
>operating system and the applications I am doing with NuttX (and I'm sure
>man
On Fri, Mar 31, 2023 at 12:23 AM Gregory Nutt wrote:
>
> > In his Confluence paper on "Signaling Semaphores and Priority
> Inheritance”, Brennan Ashton’s analysis is both thorough and accurate; ...
>
> Minor fix. I wrote the paper, Brennan converted the Confluence page
> from an older DocuWiki p
