From daoswald at gmail.com  Sun Nov  3 15:19:05 2013
From: daoswald at gmail.com (David Oswald)
Date: Sun, 3 Nov 2013 16:19:05 -0700
Subject: [Saltlake-pm] A call for November presentations (and food?)
Message-ID: <CAKTcQ96=Ai9M2uLMGpKH4=41e+Q9=YWBE+CQwc1wSH=BN-cC8A@mail.gmail.com>

If you have an idea for a presentation for our November 12th meeting,
please let me know.

Does anyone know of a corporate sponsor who would like to feed us this month?

Let's try to make our November meeting compelling!

Dave

-- 

David Oswald
daoswald at gmail.com

From daoswald at gmail.com  Tue Nov  5 16:31:01 2013
From: daoswald at gmail.com (David Oswald)
Date: Tue, 5 Nov 2013 17:31:01 -0700
Subject: [Saltlake-pm] November meeting head count
Message-ID: <CAKTcQ97QCPoe-1o_mwcW=YRfufXfKMrQc0ttYiP=RBMHj+bm=A@mail.gmail.com>

*** NEWS ALERT *** >>> Our November meeting will include FOOD! <<<

We have a volunteer for pizza and beverages at our November 12th meeting!

As a courtesy to our November sponsor, I'd like to get a rough idea of
how many will be able to attend our meeting.  If you can make it,
please speak up.  However, please don't think that failure to speak up
now disqualifies you from attending if you decide at the last minute
to come.  Everyone is welcome!


I'll be giving a discussion, probably on the steps I took recently on
producing an XS module (unless something else grabs my interest
between now and next week).  And we're open to a second talk of any
length, any topic related to Perl.



-- 

David Oswald
daoswald at gmail.com

From fozzmoo at gmail.com  Tue Nov  5 18:27:16 2013
From: fozzmoo at gmail.com (Doran L. Barton)
Date: Tue, 5 Nov 2013 19:27:16 -0700
Subject: [Saltlake-pm] November meeting head count
In-Reply-To: <CAKTcQ97QCPoe-1o_mwcW=YRfufXfKMrQc0ttYiP=RBMHj+bm=A@mail.gmail.com>
References: <CAKTcQ97QCPoe-1o_mwcW=YRfufXfKMrQc0ttYiP=RBMHj+bm=A@mail.gmail.com>
Message-ID: <20131105192716.309c3bd8@foo.fozzilinymoo.org>

On Tue, 5 Nov 2013 17:31:01 -0700
David Oswald <daoswald at gmail.com> wrote:

> We have a volunteer for pizza and beverages at our November 12th meeting!
> 
> As a courtesy to our November sponsor, I'd like to get a rough idea of
> how many will be able to attend our meeting.  If you can make it,
> please speak up.  However, please don't think that failure to speak up
> now disqualifies you from attending if you decide at the last minute
> to come.  Everyone is welcome!

I'll be there. Thanks! 

-- 
Doran L. Barton <fozzmoo at gmail.com> - Linux, Perl, Web, good fun, and more!
 "I'll fire aimlessly if you don't come out!"
    -- English film subtitle seen in Hong Kong

From daoswald at gmail.com  Sun Nov 10 21:41:16 2013
From: daoswald at gmail.com (David Oswald)
Date: Sun, 10 Nov 2013 22:41:16 -0700
Subject: [Saltlake-pm] Reminder: Meeting Tuesday @ 7:00pm
Message-ID: <CAKTcQ960DJgtY3Pjo7m4yUYqezk69QXNCvNyP=0duWaLvP63Eg@mail.gmail.com>

If you're going and haven't mentioned it to me yet, please let me
know.  I'd like to get a head count for our meeting on Tuesday the
12th of November.  We will have food provided for us, so this is as a
courtesy to our sponsor.

I'll be discussing producing XS modules.  And maybe we'll have a
little fun with something else too...

If anyone has anything they would like to present (even if it's just a
5 minute topic) let me know and we'll plan on it!

November and December are probably difficult months for people, but if
you're available, we'd love to see you.

Dave

-- 

David Oswald
daoswald at gmail.com

From daoswald at gmail.com  Tue Nov 12 08:28:49 2013
From: daoswald at gmail.com (David Oswald)
Date: Tue, 12 Nov 2013 09:28:49 -0700
Subject: [Saltlake-pm] It's tonight!
Message-ID: <CAKTcQ95TTaV1sWDxZ=SkBGiq-zQqZ5593T5Fn5VyRtwJtpP_hQ@mail.gmail.com>

Tonight at Bluehost in Draper is our November Perl Mongers meeting.
Please stop by for some pizza and Perl (they go well together).
RSVP's are appreciated but not required.

We'll be discussing Inline::C, XS, and developing an idea into an XS module.

Dave

-- 

David Oswald
daoswald at gmail.com

From daoswald at gmail.com  Tue Nov 12 21:30:36 2013
From: daoswald at gmail.com (David Oswald)
Date: Tue, 12 Nov 2013 22:30:36 -0700
Subject: [Saltlake-pm] November meeting recap
Message-ID: <CAKTcQ97FS0h_aRVJFyHZd_LkLTpGdDty_oZjx0V=Y7HQ-uMGQg@mail.gmail.com>

We had a good turnout this evening.  I didn't get a count, but the
room was full.




First I want to thank Rodney Palmer from ListMarketer for providing us
with delicious food from The Pie this evening.

His company is a Perl shop, and seeking another full time developer.
If you're looking for Perl work you may contact him at
rodney at listmarketer.com, or by phone at 877-231-3495.

Maybe you're not looking, but know someone who is.  If so, please pass
the information along.  It's good for Perl (and thus, good for us Perl
developers) if companies seeking Perl developers find them...
especially if they can find them here in Utah.




At tonight's meeting our main presentation was about getting started
with Perl XS, and Inline::C.  For those who would like to look a
little closer at the slides, they're on slideshare:

http://www.slideshare.net/daoswald/getting-started-with-perl-xs-and-inlinec

Also, some example modules that are designed to be pretty easy to
read, even for someone just starting out with XS and Inline::whatever,
see:

Math::Prime::FastSieve (This module has an Inline::CPP dependency).
List::BinarySearch::XS (This module just used plain vanilla XS, but
was developed with the aid of Inline::C)

List::BinarySearch (This module demonstrates how to provide a
pure-Perl fall-back and an automatic but optional XS dependency).




We will skip December, and resume our meetings Tuesday January 14th at
7:00pm.  If you have something you would like to talk about, you've
got a couple months to prepare.  Just let  me know!

Dave



-- 

David Oswald
daoswald at gmail.com

From fozzmoo at gmail.com  Wed Nov 13 12:47:18 2013
From: fozzmoo at gmail.com (Doran L. Barton)
Date: Wed, 13 Nov 2013 13:47:18 -0700
Subject: [Saltlake-pm] November meeting recap
In-Reply-To: <CAKTcQ97FS0h_aRVJFyHZd_LkLTpGdDty_oZjx0V=Y7HQ-uMGQg@mail.gmail.com>
References: <CAKTcQ97FS0h_aRVJFyHZd_LkLTpGdDty_oZjx0V=Y7HQ-uMGQg@mail.gmail.com>
Message-ID: <20131113134718.18a4abef@thinker>

On Tue, 12 Nov 2013 22:30:36 -0700
David Oswald <daoswald at gmail.com> wrote:

> We had a good turnout this evening.  I didn't get a count, but the
> room was full.

There were 11 or 12 people there. There was only one empty chair. Great
work, Mongers.

Here's the video: http://www.youtube.com/watch?v=l0wvw3XAB2c

-- 
Doran L. Barton <fozzmoo at gmail.com> - Linux, Perl, Web, good fun, and more!
 "Please do not wash hair or clothes in toilet."
    -- Seen in a Tokyo restroom

From daoswald at gmail.com  Wed Nov 13 13:36:01 2013
From: daoswald at gmail.com (David Oswald)
Date: Wed, 13 Nov 2013 14:36:01 -0700
Subject: [Saltlake-pm] November meeting recap
In-Reply-To: <20131113134718.18a4abef@thinker>
References: <CAKTcQ97FS0h_aRVJFyHZd_LkLTpGdDty_oZjx0V=Y7HQ-uMGQg@mail.gmail.com>
	<20131113134718.18a4abef@thinker>
Message-ID: <CAKTcQ96=Fv4N60-mSh0NRp6XJheuBu+svNMtDBVBZV9n_nhKiA@mail.gmail.com>

And the slides are at:
http://www.slideshare.net/daoswald/getting-started-with-perl-xs-and-inlinec

I'll post a link to both on the website when I get a chance.

One correction: I mentioned that the C++ "Boost::Graph" library had
been wrapped in XS to produce the CPAN "Boost::Graph" module.  This is
correct.  But I was incorrect in how this wrapping was done.  I can't
find any definitive reference to the module's author using the
AUTO_WRAP tool from Inline::C.  There are other modules that have used
this feature.  I'll try to see if sisyphus (Inline::C maintainer)
knows which modules used AUTO_WRAP.  It's certainly convenient though.

Also someone asked about memory leakage when wrapping C libraries.
The most common issue in this regard is when wrapping a library where
one function allocates memory, but never calling the function that
deallocates it; it would be a bug for a C programmer to do the same
thing.  And in most cases if Inline::C is able to use a native typemap
to convert a data type, which is often the case for wrapped functions,
the user doesn't need to worry about memory leaks.  The most common
leaks occur when the XS programmer takes control over moving Perl data
structures (SV's, AV's, HV's) back and forth using the stack
(implicitly or explicitly).  In these cases, it's important to keep
track of which XS functions increment the reference counter and which
don't.  The calling code owns a reference count, so it's important
that the XSUB doesn't retain a ref count.

Hope this clarifies, though to be honest, consulting the docs
frequently and looking at good examples such as List::MoreUtils,
List::BinarySearch, Scalar::Util, List::Util, etc... prior art is
sometimes better than the wall of documentation when it comes to
understanding how to accomplish things.

Dave

On Wed, Nov 13, 2013 at 1:47 PM, Doran L. Barton <fozzmoo at gmail.com> wrote:
> On Tue, 12 Nov 2013 22:30:36 -0700
> David Oswald <daoswald at gmail.com> wrote:
>
>> We had a good turnout this evening.  I didn't get a count, but the
>> room was full.
>
> There were 11 or 12 people there. There was only one empty chair. Great
> work, Mongers.
>
> Here's the video: http://www.youtube.com/watch?v=l0wvw3XAB2c
>
> --
> Doran L. Barton <fozzmoo at gmail.com> - Linux, Perl, Web, good fun, and more!
>  "Please do not wash hair or clothes in toilet."
>     -- Seen in a Tokyo restroom
> _______________________________________________
> Saltlake-pm mailing list
> Saltlake-pm at pm.org
> http://mail.pm.org/mailman/listinfo/saltlake-pm
> http://saltlake.pm.org



-- 

David Oswald
daoswald at gmail.com

From daoswald at gmail.com  Wed Nov 13 16:10:04 2013
From: daoswald at gmail.com (David Oswald)
Date: Wed, 13 Nov 2013 17:10:04 -0700
Subject: [Saltlake-pm] Links to slides/video from last night's meeting
	available on the website.
Message-ID: <CAKTcQ94qVok2NUfait2nx8+B9GJ80WO8S8o7+H_-w=2oJeDy+w@mail.gmail.com>

The Salt Lake Perl Mongers website has been updated with links to
slides and video from last night's meeting.


See the "past meetings" page (browser refresh may be required):
http://saltlake.pm.org/past.html

We've decided to take December off; holidays will preempt Perl.  See
you all in January.


-- 

David Oswald
daoswald at gmail.com