Thanks Gavin. I'm assuming that the caller of this method could then just use FdoPtr while getting the return value, or call FDO_SAFE_RELEASE to take care of releasing its share of object ownership. Is that correct? <br>
<br>Many thanks,<br>Snehal<br><br><div class="gmail_quote">On Fri, May 11, 2012 at 11:11 AM, Gavin Cramer <span dir="ltr"><<a href="mailto:gavin.cramer@autodesk.com" target="_blank">gavin.cramer@autodesk.com</a>></span> wrote:<br>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Hi, Snehal. In your use case is probably the most common for intermediate code that retrieves and also returns ref-counted FDO types. The only special action
to take is in the return statement, when it is necessary to increase the ref-count to preserve your method’s “share” of object ownership on behalf of its caller.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">FdoPtr<SomeFdoType> ret;<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">ret = CallSomeMethod();<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">return FDO_SAFE_ADDREF(ret.p);<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Best wishes,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Gavin<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:fdo-users-bounces@lists.osgeo.org" target="_blank">fdo-users-bounces@lists.osgeo.org</a> [mailto:<a href="mailto:fdo-users-bounces@lists.osgeo.org" target="_blank">fdo-users-bounces@lists.osgeo.org</a>]
<b>On Behalf Of </b>Snehal Joshi<br>
<b>Sent:</b> Friday, May 11, 2012 12:03 PM<br>
<b>To:</b> FDO Users Mail List<br>
<b>Subject:</b> [fdo-users] Memory management and FdoPtr<u></u><u></u></span></p><div><div class="h5">
<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Hi All,<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">I just started using FDO libraries, and have a question regarding memory management in FDO. I am confused about when to use FdoPtr and FDO_SAFE_ADDREF/FDO_SAFE_RELEASE.
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">Based on the information in the Developer's Guide, my understanding is that FdoPtr will take care of incrementing the reference count/release the object (provided the class implementes FdoIDisposable) - however, it'll call Release() as
soon as the FdoPtr goes out of scope. So, within a function I write, if I wrap the return values of one of the FDO create/get methods in an FdoPtr, and return that FdoPtr as a function return value, it's a bad idea. Is that a valid assumption?<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal">Thanks,<u></u><u></u></p>
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<p class="MsoNormal">Snehal<u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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<p class="MsoNormal"> <u></u><u></u></p>
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