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<== Date ==> <== Thread ==>
Subject: Re: FAST_LOCK and R3.14
From: Eric Norum <[email protected]>
To: Dirk Zimoch <[email protected]>
Cc: TECHTALK <[email protected]>
Date: Thu, 19 Oct 2006 11:32:28 -0500
In many cases that's going to slow your driver down more than necessary. Here are the notes from the vxWorks->OSI conversion document:

http://www.aps.anl.gov/epics/wiki/index.php/ How_to_make_your_EPICS_driver_operating_system_independent

You’ll have to use your judgement here. If the section of code
being protected is ‘quick’ (less than a few microseconds) it’s rea-
sonable to simply disable interrupts while the code is active. In
this case you can remove the ‘lock’ variable and the init/free
operations and then add a local ‘key’ variable and replace the
lock/unlock operations with epicsInterruptLock/Unlock opera-
tions. If the section of code being protected is longer you’ll have
to convert the FASTLOCK to an EPICS mutex.


On Oct 19, 2006, at 10:52 AM, Dirk Zimoch wrote:

Hi all

I have to convert some drivers from 3.13 to 3.14.

Is it save (and recommended) to replace FAST_LOCK with epicsMutex ?

Dirk

--
Dr. Dirk Zimoch
Swiss Light Source
Computing and Controls
Paul Scherrer Institut
phone +41 56 310 5182
fax   +41 56 310 4413


--
Eric Norum <[email protected]>
Advanced Photon Source
Argonne National Laboratory
(630) 252-4793



References:
FAST_LOCK and R3.14 Dirk Zimoch
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