Re: Mac memory allocation: NewPtr or Ada's "new"

[jhopper@erinet.com (jim hopper)]

Bill,

gnat calls malloc for new, which is supplied by the mac standard c lib
when doing standalone apps.  calling new should be functionally
equivalant to new_ptr.   If i were you i would check out how the mac
texts suggest c programmers do it (ie malloc vs new_ptr) and do the
same as the issues are identical.  try asking it that way in
comp.sys.mac.programmer.  

sorry i don't do c on the mac unless i get paid double ;-)

new_handle on the other hand is a whole nother ball park!  Always use
new_handle rather than creating pointer to pointer so the mac os can
handle memory correctly for you.

jim

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In article <brennanw-1603971254020001@indian-6.vf.pond.com>
brennanw@pond.com (William  C Brennan) writes:

> I'm learning to do Mac programming using GNAT under CodeBuilder, 
> and I'm a little confused about allocating memory from the heap.
> Perhaps someone can help...
> 
> I have two Mac programming texts, and both of them tell me that
> when I want to allocate memory from the heap, I should call the
> NewPtr function, which seems to be functionally equivalent to the
> Ada "new" allocator.  I'd prefer to use the "new" allocator because
> it's not tied to an OS, but I would like to understand any
> subtle differences which aren't apparent on the surface.
> 
> Is there a operational difference between calling the MacOS NewPtr 
> and using Ada's "new" allocator?  How is "new" implemented for
> GNAT under MacOS?