[ace-users] ACE_Sempahore problem

[Sowayan, Abdullah (N-DUA)]

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.

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