[Ace-users] [ace-users] Calcule the microseconds difference between two times

[Douglas C. Schmidt]

Hi Santos,

   Thanks for using the PRF.

>     CIAO VERSION: 0.5.9
>     TAO VERSION : 1.5.9
>     ACE VERSION : 5.5.9
> 
>     HOST MACHINE and OPERATING SYSTEM:
>         If on Windows based OS's, which version of WINSOCK do you
>         use?: Pentium IV, Debian linux kernel 2.6
> 
>     TARGET MACHINE and OPERATING SYSTEM, if different from HOST:
>     COMPILER NAME AND VERSION (AND PATCHLEVEL):
> 
>     THE $ACE_ROOT/ace/config.h FILE [if you use a link to a platform-
>     specific file, simply state which one]:#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++)]:
>     no_hidden_visibility=1
>     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): There is no
> such file.
> 
>     AREA/CLASS/EXAMPLE AFFECTED:
> [What example failed?  What module failed to compile?]
> 
>     DOES THE PROBLEM AFFECT:
>         COMPILATION? No.
>             If so, what do your $ACE_ROOT/ace/config.h and
>             $ACE_ROOT/include/makeinclude/platform_macros.GNU contain?
>         LINKING? No.
>             On Unix systems, did you run make realclean first?
>         EXECUTION? No.
>         OTHER (please specify)?
> [Please indicate whether ACE/TAO/CIAO, your application, or both are
> affected.]
> 
>     SYNOPSIS: Calcule the microseconds difference between two times.
> [Brief description of the problem]
> 
>     DESCRIPTION:
> [Detailed description of problem.  Don't just say "<blah>
> doesn't work, here's a fix," explain what your program does
> to get to the <blah> state. ]
> 
> Hi,
> 
> I need to calculate the microseconds elapsed from one start time to one end time. I'm using the ACE_Date_Time class to
> obtain the current time value. Can I subtract these values to obtain the difference of the two times in microseconds? I
> took a look at the ACE_Time_Value class too but I wasn't able to make it work. I would appreciate if you can help me with
> this matter or point me an example that I can follow.

I think you probably want to use ACE_High_Res_Timer for this stuff since
the other timers have too coarse a level of granularity.  Please see

ACE_ROOT/tests/High_Res_Timer_Test.cpp

for an example of how to use this.

Thanks,

Doug