Hi,

I am trying to setup logging in my application, and this is my difficulites
:

It's not clear what TLSF is, at least a link to its web description could be
a plus.

It tooks me some time to understand that :

For real-time performance, ensure that TLSF is built with MMAP and SBRK
> support OFF (-DOS_RT_MALLOC_MMAP=OFF -DOS_RT_MALLOC_SBRK=OFF).
>

refers to rtt CMake options.

2010/9/28 Stephen Roderick <kiwi [dot] net [..] ...>

> On Sep 28, 2010, at 05:09 , Sagar Behere wrote:
>
> > On 09/23/2010 05:14 PM, S Roderick wrote:
> >>
> >> On Sep 23, 2010, at 10:02 , Sagar Behere wrote:
> >>
> >>> Hello,
> >>>
> >>> The RTT changes documents states that "the RTT::Logger class has been
> >>> deprecated. Although it is part of this release, you should not rely on
> >>> it for future compatibility."
> >>>
> >>> So how is logging to be done now? I saw something related to the
> log4cpp
> >>> library, so I downloaded and cross-compiled it, set BUILD_LOGGING to ON
> >>> while doing ccmake in ocl/build directory and indicated the right
> paths.
> >>
> >> You can not use the standard log4cpp. We had to modify it to support
> real-time. See the orocos-toolchain/log4cpp project on gitorious.
> >>
> >> Documentation on this is still in progress. In particular, see
> OCL/bin/deployer.cpp for example of setting up TLSF and log4cpp
> HierarchyMaintainer to setup the necessary infrastructure. I believe this is
> in v1 on github, but sure whether is in v2 yet.
> >
> > The OCL/bin/deployer.cpp raised more questions than it answered :(
> >
> > I understand if the documentation is in progress, but is it possible to
> see some code of a simple taskcontext that simple logs "updateHook() was
> called." to a file/stdout without doing anything else? That shouldn't take
> more than a few minutes to code but will help to get started using the new
> logging method.
> >
> > Thanks in advance,
> > Sagar
>
> The documentation is fairly complete at
>
> http://orocos.org/wiki/rtt/rtt-20/real-time-logging/using-real-time-logging
>
> and looks to be up to date. I've attached a sample configuration file.
> Start a deployer using this as the site file, before you start your
> application
>
> deployer-gnulinux --site /path/to/setup-logging.xml --start
> /path/to/myapplication.xml
>
> Create a basic component with
>
> OCL::logging::Category* logger;
>
> as a class member variable, then in configureHook() do
>
> logger =
> dynamic_cast<OCL::logging::Category*>(
>
> &log4cpp::Category::getInstance("components.ComponentA"));
> // the name above should match something in the setup-logging file
> // NB you _must_ use the above method to get the category created by the
> site file
>
> and in updateHook()
>
> logger->info(OCL::String("updateHook called"));
>
> and look in the "robot.log" file for the output.
>
> I am definitely interested in feedback, so let me know how it goes or if
> you have more questions.
> Stephen
>
>
>
>
>
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>