Autonomous Functions

QNX Newsgroups (Archives) comp.os.qnx
1

Hello QNX Community,

During QNX training, I remember the instructor saying something about
autonomous functions. That is there was a way in QNX to force a function to
run to completion without being switched out.

Does anyone recall this? Is there a way to do it? Also, if it’s possible
does it prevent interrupts as well from taking over the CPU?

Thanks in advance,
Phil

2

“Phil” <felipe.marcelino@sippican.com> wrote in message
news:c7demg$rv9$1@inn.qnx.com…

Hello QNX Community,

During QNX training, I remember the instructor saying something about
autonomous functions. That is there was a way in QNX to force a function
to
run to completion without being switched out.

First time I hear about “autonomous functions”.

Does anyone recall this? Is there a way to do it? Also, if it’s possible
does it prevent interrupts as well from taking over the CPU?

Look at InterruptLock(), InterruptDisable(), InterruptMask()

Thanks in advance,
Phil

3

Mario Charest postmaster@127.0.0.1 wrote:

“Phil” <> felipe.marcelino@sippican.com> > wrote in message
news:c7demg$rv9$> 1@inn.qnx.com> …
Hello QNX Community,

During QNX training, I remember the instructor saying something about
autonomous functions. That is there was a way in QNX to force a function
to
run to completion without being switched out.

First time I hear about “autonomous functions”.

“atomic” functions, perhaps?

#include <atomic.h>

Cheers,
-RK

Does anyone recall this? Is there a way to do it? Also, if it’s possible
does it prevent interrupts as well from taking over the CPU?


Look at InterruptLock(), InterruptDisable(), InterruptMask()

Thanks in advance,
Phil

–
[If replying via email, you’ll need to click on the URL that’s emailed to you
afterwards to forward the email to me – spam filters and all that]
Robert Krten, PDP minicomputer collector http://www.parse.com/~pdp8/

4

May you talk about FIFO scheduling where a thread can run
as long as no other thread has a higher priority and state READY?
BTW: On QNX, an hardware IRQ always have a higher priority
than any other software thread.
Phil wrote:

Hello QNX Community,

During QNX training, I remember the instructor saying something about
autonomous functions. That is there was a way in QNX to force a function to
run to completion without being switched out.

Does anyone recall this? Is there a way to do it? Also, if it’s possible
does it prevent interrupts as well from taking over the CPU?

Thanks in advance,
Phil