<div class="blog">
<h1 id="NAME">
-Catching memory leaks in XS
+More Games + Update
</h1>
<div class="CONTENT">
-<div style="text-align: right;"><i> I slay dragons, yonder</i></div><br />So I am trying to find and plug memory leaks in SDL perl. Most of the <a href="https://rt.cpan.org/Ticket/Display.html?id=49084">memory leaks</a> occur because in XS a reference is still held. One very expensive mem leak was caught by TELS really early on <a href="https://rt.cpan.org/Ticket/Display.html?id=17976">here</a>. The problem occurs where in XS there is<br /><br /><blockquote><i>RETVAL</i><i> = (cast *) safemalloc( ... );</i></blockquote> and safefree(...) is never called.<br />Here is a in <a href="http://github.com/kthakore/SDL_perl/blob/63ebaa682697728f5946f700a2b2c12534b1b821/src/SDL.xs">code example</a> lines 1082 on. <br /><br />My question is how I can mitigate these memory leaks? One idea I had was to store all malloc'd pointers to an array that is safefree'd on DESTROY or hooked into perl GC somehow .<br /><br /><br />Any guidance is helpful.<br /><br /><i>--yapgh</i><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/3102167581424744259-7742659740534179607?l=yapgh.blogspot.com' alt='' /></div></div></div>
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+<div style="text-align: right;"><i><br />
+idle digits,<br />
+play,<br />
+away,<br />
+idle digits.<br />
+</i></div><br />
+So while I am hacking away on v2.4 and <a href="http://github.com/kthakore/SDL_perl/tree/experimental">breaking</a> a lot of things. Here is a link to some more <a href="http://home.comcast.net/%7Eg.f.taylor/GarrysGames.html">games</a> for SDL Perl. These only work in windows now but I will look into bringing them to CPAN (with Garry's permission). <br />
+<br />
+<i>--yapgh</i><br />
+<br />
+These where reported by Garry Taylor. Here is the rest of the email:<br />
+<br />
+<blockquote><i>Hi all,</i><br />
+<i>I hadn't checked this newsgroup in a while and was happy to see </i><br />
+<i>that it still alive and well. I saw that some people had been sharing </i><br />
+<i>some SDL Perl games online, and I had a few to share as well. At </i><br />
+<i>"http://home.comcast.net/~g.f.taylor/GarrysGames.html" you can find four </i><br />
+<i>games I have written as well as a simple flip book program to let a </i><br />
+<i>child play at making animation on the computer. The games are "Toad" (a </i><br />
+<i>Frogger wanna be), "RabbitHat" (like Centipede), "BunnyHunt" (sort of </i><br />
+<i>like Pac-Man) and "Bonk The Buggies". All (with the exception of Toad </i><br />
+<i>which in its very first incarnation was a game I wrote in TRS-80 Basic </i><br />
+<i>back in 1981) were written originally to run on my Windows 3.11 PC for </i><br />
+<i>my little girl so that she could play games which were not quite so </i><br />
+<i>violent as games were starting to become at the time.</i><br />
+<i><br />
+</i><br />
+<i>A few years ago I got the idea of trying to get them to run again </i><br />
+<i>by rewriting them in Perl. The downloads are Windows XP/Vista installs </i><br />
+<i>which include a bare bones Perl environment for running the games (the </i><br />
+<i>installs put the code into its own separate place, and shouldn't </i><br />
+<i>interfere with your existing Perl setups). I did this so that I could </i><br />
+<i>share the games with friends and family who either don't have SDL </i><br />
+<i>installed, don't have Perl installed, or don't do any programming and </i><br />
+<i>just needed something that will run. The code as it currently stands </i><br />
+<i>was not written for general publication, so there are probably places </i><br />
+<i>where the Perl code itself is not always the best looking it could be, </i><br />
+<i>but the games themselves work pretty well. Also, it is worth noting </i><br />
+<i>that I wound up being lazy and made a few additions to the Perl SDL code </i><br />
+<i>that I was using to add an additional function or two for printing text </i><br />
+<i>onto the screen that was centered or right aligned.</i><br />
+<i><br />
+</i><br />
+<i>While I have not made any Unix installs for the code, I have </i><br />
+<i>actually run the games on a few Linux machines that I have access to, </i><br />
+<i>where I also had installed SDL. I have not updated my SDL installs in </i><br />
+<i>several years now, so there may be complications that arise if running </i><br />
+<i>it with a new version of SDL.</i><br />
+<i><br />
+</i><br />
+<i>I hope you enjoy the games (or at least aren't too mean about it </i><br />
+<i>if you don't).</i><br />
+<i>Garry Taylor</i></blockquote><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/3102167581424744259-500220938152318100?l=yapgh.blogspot.com' alt='' /></div>
+<p><a href="http://feedads.g.doubleclick.net/~a/0KKHnr9jOgazWK4j_1G9YWPSuXI/0/da"><img src="http://feedads.g.doubleclick.net/~a/0KKHnr9jOgazWK4j_1G9YWPSuXI/0/di" border="0" ismap="true"></img></a><br/>
+<a href="http://feedads.g.doubleclick.net/~a/0KKHnr9jOgazWK4j_1G9YWPSuXI/1/da"><img src="http://feedads.g.doubleclick.net/~a/0KKHnr9jOgazWK4j_1G9YWPSuXI/1/di" border="0" ismap="true"></img></a></p><img src="http://feeds.feedburner.com/~r/YetAnotherPerlGameHackeryapgh/~4/T10swKg2Nik" height="1" width="1"/></div></div>
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