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<TITLE> [Mono-bugs] [Bug 59909][Wis] Changed - passing classes to C library functions doesn't allow modification
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<H1>[Mono-bugs] [Bug 59909][Wis] Changed - passing classes to C library functions doesn't allow modification
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<B>bugzilla-daemon@bugzilla.ximian.com
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<A HREF="mailto:bugzilla-daemon%40bugzilla.ximian.com"
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TITLE="[Mono-bugs] [Bug 59909][Wis] Changed - passing classes to C library functions doesn't allow modification">bugzilla-daemon@bugzilla.ximian.com
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<I>Thu, 10 Jun 2004 23:39:19 -0400 (EDT)</I>
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<PRE>Please do not reply to this email- if you want to comment on the bug, go to the
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URL shown below and enter your comments there.
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Changed by <A HREF="mailto:mathpup@mylinuxisp.com.">mathpup@mylinuxisp.com.</A>
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<A HREF="http://bugzilla.ximian.com/show_bug.cgi?id=59909">http://bugzilla.ximian.com/show_bug.cgi?id=59909</A>
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--- shadow/59909 2004-06-10 16:53:07.000000000 -0400
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+++ shadow/59909.tmp.24142 2004-06-10 23:39:19.000000000 -0400
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@@ -43,6 +43,17 @@
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Created an attachment (id=8100)
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an example that doesn't work with mcs
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------- Additional Comments From <A HREF="mailto:vargaz@freemail.hu">vargaz@freemail.hu</A> 2004-06-10 16:53 -------
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-> runtime
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+
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+------- Additional Comments From <A HREF="mailto:mathpup@mylinuxisp.com">mathpup@mylinuxisp.com</A> 2004-06-10 23:39 -------
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+I noticed that inserting an OutAttribute in front of the parameter
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+for the P/Invoke declaration works around the problem:
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+
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+private static extern void testfn([Out] RefInt i)
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+
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+So the mechanism for copying the data back from the temporary copy in
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+unmanaged storage to the managed class is there. It just isn't being
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+used without the OutAttribute.
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+
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