[ace-users] ACE_Sempahore problem

Johnny Willemsen jwillemsen at remedy.nl
Thu Sep 27 13:13:42 CDT 2007


Hi,

> Yes, we do have Semaphores initialized to 0, this may be the problem we're
> facing as well. I'll try it out and let you know.

Ok, if you could first extend the ACE regression test (test also other
values then 0) to reproduce we can at least make this visible on the
scoreboard.

Johnny

>
> Thanks,
> Abdul
>
> ________________________________________
> From: Johnny Willemsen [mailto:jwillemsen at remedy.nl]
> Sent: Thursday, September 27, 2007 12:21 PM
> To: 'Julián Lastiri'; ace-users at cse.wustl.edu
> Cc: Sowayan, Abdullah (N-DUA)
> Subject: RE: [ace-users] ACE_Sempahore problem
>
> Hi,
>  
> Thanks for using the PRF form. This seems the problem that Abdul reported
> earlier. As workaround edit include/makeinclude/platform_linux_common.GNU
> and comment out the next line:
>     CPPFLAGS += -DACE_HAS_LINUX_NPTL
>  
> Can you file this in bugzilla so that it doesn't get lost (see
> )http://deuce.doc.wustl.edu/bugzilla/index.cgi)
>  
> Regards,
>  
> Johnny Willemsen
> Remedy IT
> Postbus 101
> 2650 AC  Berkel en Rodenrijs
> The Netherlands
> www.theaceorb.nl / www.remedy.nl 
>
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>
> ________________________________________
> From: ace-users-bounces at cse.wustl.edu
> [mailto:ace-users-bounces at cse.wustl.edu] On Behalf Of Julián Lastiri
> Sent: Thursday, September 27, 2007 6:00 PM
> To: ace-users at cse.wustl.edu
> Subject: [ace-users] ACE_Sempahore problem
>
>     ACE VERSION: 5.6.1
>
>     HOST MACHINE and OPERATING SYSTEM:
>
> Intel X86 32bits. Ubuntu 7.04, kernel 2.6.20-16-generic #2 SMP Sun Sep 23
> 19:50:39 UTC 2007 i686 GNU/Linux
>
>     TARGET MACHINE and OPERATING SYSTEM, if different from HOST:
>     COMPILER NAME AND VERSION (AND PATCHLEVEL):
>
> Same as HOST
>
>     THE $ACE_ROOT/ace/config.h FILE [if you use a link to a platform-
>     specific file, simply state which one]:
>
> config.h
> #define ACE_HAS_TIMED_MESSAGE_BLOCKS
> #include "ace/config-linux.h"
>
>     THE $ACE_ROOT/include/makeinclude/platform_macros.GNU FILE [if you
>     use a link to a platform-specific file, simply state which one
>     (unless this isn't used in this case, e.g., with Microsoft Visual
>     C++)]:
>
> $ACE_ROOT/include/makeinclude/platform_macros.GNU
> include $(ACE_ROOT)/include/makeinclude/platform_linux.GNU
>
>     CONTENTS OF $ACE_ROOT/bin/MakeProjectCreator/config/default.features
>     (used by MPC when you generate your own makefiles):
>
>     AREA/CLASS/EXAMPLE AFFECTED:
> [What example failed?  What module failed to compile?]
>
>     DOES THE PROBLEM AFFECT:
>         COMPILATION?
> NO
>         LINKING?
> NO
>         EXECUTION?
> YES
>
>     SYNOPSIS:
> ACE_Semaphore acquire with initial count=0 doesn't block
>
>     DESCRIPTION:
> I'm using ACE_Semaphore initialized with count=0 and when i call acquire
> it doesn't block
>
>
>     REPEAT BY:
>
> test.cpp
> #include <ace/Semaphore.h>
> #include <ace/Log_Msg.h>
> int main(){
>         ACE_Semaphore semaphore( 0 ) ;
>         semaphore.acquire() ;
>         ACE_DEBUG (( LM_DEBUG, "BUG !\n" )) ;
>         return 0 ;
> }
>
> compiled
> g++ test.cpp -o test -lACE
>
> this example works fine on ACE 5.5.10 with same config.h and
> platform_macros.GNU
>
>     SAMPLE FIX/WORKAROUND:
>
> g++ test.cpp -D ACE_HAS_POSIX_SEM -o test -lACE
>
>




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