View Issue Details

IDProjectCategoryView StatusLast Update
0022808CommunityOCCT:Foundation Classespublic2013-04-29 15:22
Reporterszy Assigned Tobugmaster  
Status closedResolutionfixed 
Product Version6.5.2 
Target Version6.6.0Fixed in Version6.6.0 
Summary0022808: Undocumented change of global locale
DescriptionPost from the forum -
1."What is the purpose of the line 1549
(void)setlocale(LC_ALL, "");
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."

2. "
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."
TagsNo tags attached.
Test case number

Attached Files

  • drop-setlocale.patch (2,150 bytes)
  • drop-setlocale2.patch (2,423 bytes)


related to 0022898 closedabv IGES import fails in german environment 
related to 0022933 closedbugmaster Thread-safe locale handling in OSD_Localizer 



2012-01-17 18:20

developer   ~0019157

Last edited: 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


2012-01-17 18:21


drop-setlocale.patch (2,150 bytes)


2012-01-17 18:44


drop-setlocale2.patch (2,423 bytes)


2012-01-17 18:45

developer   ~0019160

drop-setlocale2.patch supersedes drop-setlocale.patch, it also removes #include <locale.h>


2012-01-20 18:31

manager   ~0019213

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)


2012-01-20 18:47

developer   ~0019214

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.


2013-02-19 12:41

developer   ~0023384

Dear bugmaster,

this issue was taken into account within 0022898 patch.
Please close this bug.


2013-02-19 18:47

administrator   ~0023391

The problem has been corrected by fix for 0022898 issue.

Issue History

Date Modified Username Field Change
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
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 aiv Status verified => closed
2013-04-29 15:22 aiv Fixed in Version => 6.6.0