From: Philippe Gerum <rpm@xenomai.org>
To: Julien Blanc <julien.blanc@sprinte.eu>,
Pierre FICHEUX <pierre.ficheux@smile.fr>
Cc: Pierre FICHEUX via Xenomai <xenomai@xenomai.org>
Subject: Re: rt_task_inquire() equivalent for POSIX ?
Date: Thu, 7 Nov 2019 09:44:51 +0100 [thread overview]
Message-ID: <956fff32-9301-4b91-14b7-b2583f12508c@xenomai.org> (raw)
In-Reply-To: <148f7f7281a9350172cbd5895a223c500582f36d.camel@sprinte.eu>
On 2019-11-07 08:56, Julien Blanc via Xenomai wrote:
> Le jeudi 07 novembre 2019 à 06:47 +0100, Pierre FICHEUX via Xenomai a
> écrit :
>> I've tried it but got the pid of the "main" thread not the RT one
>> (that's
>> normal...).
>>
>
> extern "C"
> {
> int cobalt_thread_pid(pthread_t);
> }
>
> int tid = cobalt_thread_pid(pthread_self())
>
> but i’m not sure what you mean by the cobalt thread id vs posix thread
> id. IIRC they have the same value (ie, syscal(__NR_gettid) would give
> the same value (for rt threads), maybe at the expense of a mode
> switch).
This may be worth a read for context:
http://man7.org/linux/man-pages/man2/gettid.2.html
cobalt_thread_pid() translates POSIX thread identifiers to kernel thread identifiers some Linux-specific calls need (e.g. thread-directed signals).
--
Philippe.
next prev parent reply other threads:[~2019-11-07 8:44 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-06 21:04 rt_task_inquire() equivalent for POSIX ? Pierre FICHEUX
2019-11-07 0:20 ` Lowell Gilbert
2019-11-07 5:47 ` Pierre FICHEUX
2019-11-07 7:56 ` Julien Blanc
2019-11-07 8:44 ` Philippe Gerum [this message]
2019-11-07 9:03 ` Pierre FICHEUX
2019-11-07 8:04 ` Steve Freyder
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