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|0022808||Community||[OCCT] OCCT:Foundation Classes||public||2011-11-21 11:12||2013-04-29 15:22|
|Product Version||[OCCT] 6.5.2|
|Target Version||[OCCT] 6.6.0||Fixed in Version||[OCCT] 6.6.0|
|Summary||0022808: Undocumented change of global locale|
|Description||Post from the forum - http://www.opencascade.org/org/forum/thread_22210/. [^]|
1."What is the purpose of the line 1549
in Storage_Schema.cxx, Storage_Schema::ICreationDate()?
And more important why is the locale not set back, like LC_NUMERIC in the same function? This function gets called everytime I use the OCC save mechanism. This (for me) unrecognized change of the localization messed things up in the rest of my application.
As a fix I used the OSD_Localizer to encapsulate my OCC calls and prevent interference with my own localization settings.
But I think this should still be considered a bug."
Markus Rhein | reply 2011/11/18 15:49
I don╢t think OSD_Localizer is working as intended.
Is it possible that the variable myLocale can get corrupt before restore () gets called?
Also I would suggest restoring the original localization settings in the destructor of OSD_Localizer."
|Tags||No tags attached.|
|Test case number|
|Attached Files|| drop-setlocale.patch (2,150 bytes) 2012-01-17 18:21|
drop-setlocale2.patch (2,423 bytes) 2012-01-17 18:44
edited on: 2012-01-17 18:22
Since dates are created by calling strftime with a locale-independent format, result is independent of user's locale and all calls to setlocale can be dropped (from src/Storage/Storage_Schema.cxx and src/XmlLDrivers/XmlLDrivers.cxx). See drop-setlocale.patch
|drop-setlocale2.patch supersedes drop-setlocale.patch, it also removes #include <locale.h>|
We shall use OSD_Localizer class to set / unset locales throughout the OCCT code. As indicated in discussions on the forums, this class needs to be improved:
- Make copy of the string returned by setlocale
- Restore locale in destructor (perhaps optionally)
- Provide thread-safe work with locales (e.g. using C++ locales as suggested by Denis Barbier, or switching global setting, like _configthreadlocale() in MSVC)
My reluctance against setlocale() is that this function modifies locales for *all* threads. This may be a serious problem in a multithreaded environment, even if original locale is restored afterwards, because OCC code may cause trouble in 3rd party code.
This is why I advocated for using C++ locales, one can change locale for a single stream. OTOH it seems that uselocale() is a new POSIX 2008 function which works like setlocale() but only on the current thread. This may be an option, I have no idea how well it is supported. It is in glibc for a long time. You already provided a similar solution on Windows.
this issue was taken into account within 0022898 patch.
Please close this bug.
|The problem has been corrected by fix for 0022898 issue.|
|2011-11-21 11:12||szy||New Issue|
|2011-11-21 11:12||szy||Assigned To||=> abv|
|2012-01-17 16:26||abv||Relationship added||related to 0022898|
|2012-01-17 18:20||barbier||Note Added: 0019157|
|2012-01-17 18:21||barbier||File Added: drop-setlocale.patch|
|2012-01-17 18:22||barbier||Note Edited: 0019157||View Revisions|
|2012-01-17 18:44||barbier||File Added: drop-setlocale2.patch|
|2012-01-17 18:45||barbier||Note Added: 0019160|
|2012-01-20 18:31||abv||Note Added: 0019213|
|2012-01-20 18:31||abv||Status||new => assigned|
|2012-01-20 18:47||barbier||Note Added: 0019214|
|2012-01-30 08:17||abv||Relationship added||related to 0022933|
|2012-03-22 06:16||abv||Target Version||6.5.3 => 6.5.4|
|2012-10-23 19:01||abv||Target Version||6.5.4 => 6.6.0|
|2013-02-19 12:41||kgv||Note Added: 0023384|
|2013-02-19 12:41||kgv||Status||assigned => feedback|
|2013-02-19 12:41||kgv||Assigned To||abv => bugmaster|
|2013-02-19 18:46||bugmaster||Status||feedback => tested|
|2013-02-19 18:47||bugmaster||Note Added: 0023391|
|2013-02-19 18:47||bugmaster||Status||tested => verified|
|2013-02-19 18:47||bugmaster||Resolution||open => fixed|
|2013-04-23 13:36||user533||Status||verified => closed|
|2013-04-29 15:22||user533||Fixed in Version||=> 6.6.0|
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