EPICS Controls Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  <20172018  2019  2020  2021  2022  2023  2024  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  <20172018  2019  2020  2021  2022  2023  2024 
<== Date ==> <== Thread ==>

Subject: Re: Arbitrary limit on timeouts?
From: Michael Davidsaver <[email protected]>
To: Eric Norum <[email protected]>
Cc: EPICS mailing list <[email protected]>
Date: Wed, 7 Jun 2017 19:38:38 +0200
On 06/07/2017 06:50 PM, Eric Norum wrote:
> Why are timeouts for things like epicsEventWaitWithTImeout() limited to
> 1 hour?
> This is for R3.15.4, but I suspect the code is the same in lots of versions.

Since at least 2000 (first occurrence I find).  The commit message
doesn't give any clues.

https://github.com/epics-base/epics-base/commit/8c60195f4b463bff42f6f967da8bc19d6f5ad11d#diff-583652b37e7f98cf7b720e489744ce88R57

Seems rather arbitrary, so I think this could be removed (or enlarged).



> The code that applies the limit is in src/libCom/osi/os/posix/osdTime.cpp:
> 
>     extern "C" epicsShareFunc void
>         convertDoubleToWakeTime(double timeout,struct timespec *wakeTime)
>     {
>         struct timespec wait;
>         int status;
> 
>         if(timeout<0.0) timeout = 0.0;
>         else if(timeout>3600.0) timeout = 3600.0;
>     #ifdef CLOCK_REALTIME
>         status = clock_gettime(CLOCK_REALTIME, wakeTime);
>     #else
>         {
>     . . .
> 
> 
> 
> 
> -- 
> Eric Norum
> [email protected] <mailto:[email protected]>
> 


Replies:
Re: Arbitrary limit on timeouts? Eric Norum
References:
Arbitrary limit on timeouts? Eric Norum

Navigate by Date:
Prev: Arbitrary limit on timeouts? Eric Norum
Next: Re: Arbitrary limit on timeouts? Eric Norum
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  <20172018  2019  2020  2021  2022  2023  2024 
Navigate by Thread:
Prev: Arbitrary limit on timeouts? Eric Norum
Next: Re: Arbitrary limit on timeouts? Eric Norum
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  <20172018  2019  2020  2021  2022  2023  2024 
ANJ, 21 Dec 2017 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·