It's not clear to me from this explanation why this code should fail:
pthread_setschedparam(pthread_self(), SCHED_OTHER, ¶m);
but in winpthreads, for a detached thread, it will.
> Re: [Mingw-w64-public] winpthreads, pthread_setschedparam, and detached
> threads
> From: lh mouse<lh_mouse@12...> - 2016-06-01 03:31:43
> Note that in most cases threads other than the one calling `pthread_detach()`
> can terminate at anytime. After a call `pthread_detach()`, if the thread
> terminates, its resources are freed automatically, rendering the `pthread_t`
> no longer valid. It is impossible to tell whether a `pthread_t` is
> designating a thread that has terminated. It may even be designating a thread
> that is different from the one the user expects because thread IDs
> can be reused.
> By calling `pthread_detach()` on a `pthread_t` you _semantically_
> destroy/close it and should not use it any more.
------------------
Best regards,
lh_mouse
2016-06-01
-------------------------------------------------------------
发件人："Burkhardt, Glenn B UTAS" <Glenn.Burkhardt@...>
发送日期：2016-05-31 23:11
收件人：mingw-w64-public@...
抄送：
主题：[Mingw-w64-public] winpthreads, pthread_setschedparam,
and detached threads
The way the winpthreads code is writing, the Windows handle for the thread is
cleared when the thread is made detached. That means that the
pthread_setschedparam() call can't work. So thread priorities for detached
threads can only be set once, at thread creation, before the thread is
detached, or as part of the pthread_create() call.
Is there a reason for this? For me, it's unexpected behavior.
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