using Qlist with a class

[jacek]

Because I am using SSE2 instructions, the program crashes...

It doesn't crash on my system. Are there any error messages? What CPU do you have?

My question? How would I rewrite the program to allow for QList<myClass> list; instead of QList<myClass *> list;

Just change:

QList<myClass *> list;
list.append(new myClass());

QList<myClass *> list;
list.append(new myClass());

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to

QList<myClass> list;
list.append( myClass() );

QList<myClass> list;
list.append( myClass() );

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The default implementations of operator= and copy constructor will be enough for myClass.

[Havard]

I just wanted to say that the problem was finally solved, but turned out to be a lot more complex than I had expected.

Without going into too much detail, it turns out that there is a problem with aligning the 16 byte sse2 variables inside a c++ class with a microsoft compiler.

So jacek, I am guessing that you are not using a microsoft-compiler since you did not get any errors with the little test-program I posted. I am even guessing you are not using anything microsoft (like Visual Studio) at all...?

The solution was to overload the "new" operator to make it align them properly.

[Havard]

Here is a link with the fix, if anyone would be interested in using sse2 with classes: http://softwarecommunity.intel.com/i.../30231301.aspx

[jacek]

So jacek, I am guessing that you are not using a microsoft-compiler since you did not get any errors with the little test-program I posted. I am even guessing you are not using anything microsoft (like Visual Studio) at all...?

Yes, you are absolutely right.