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Money
Guest
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 Posted: Mon Dec 25, 2006 9:05 am Post subject: Need for user defined delete or built-in will work? |
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When we do this
Test *ptr=new Test[10];
then runtime memory manager will allocate 10*sizeof(Test) + X bytes(X
varying from implementation to implementation)
But instead if I call operator new explicitly like
Test *ptr = static_cast<Test *>(operator new[]( 10*sizeof(Test) ));
Now there's no extra X bytes allocated by me. So, will the built-in
delete[] will work properly? or do I need to supply my own operator
delete[]? |
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Mike Wahler
Guest
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| Posted: Mon Dec 25, 2006 9:23 am Post subject: Re: Need for user defined delete or built-in will work? |
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"Money" <spicymonchi (AT) gmail (DOT) com> wrote in message
news:1167015924.241462.69590 (AT) i12g2000cwa (DOT) googlegroups.com...
| Quote: | When we do this
Test *ptr=new Test[10];
then runtime memory manager will allocate 10*sizeof(Test) + X bytes(X
varying from implementation to implementation)
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There's no guarantee that the new[] operator or 'operator new[]()'
will allocate more than the size requested. Only that *at least*
the requested size will be allocated.
| Quote: |
But instead if I call operator new explicitly like
Test *ptr = static_cast<Test *>(operator new[]( 10*sizeof(Test) ));
Now there's no extra X bytes allocated by me.
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See above.
| Quote: | So, will the built-in
delete[] will work properly? or do I need to supply my own operator
delete[]?
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Normally the new[] operator will suffice.
What specifically are you trying to do?
-Mike |
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