Re: Using malloc in C++?

From:
 James Kanze <james.kanze@gmail.com>
Newsgroups:
comp.lang.c++
Date:
Mon, 11 Jun 2007 01:49:58 -0700
Message-ID:
<1181551798.790775.113400@n4g2000hsb.googlegroups.com>
On Jun 7, 1:37 pm, Gianni Mariani <gi3nos...@mariani.ws> wrote:

Ian Collins wrote:

Gianni Mariani wrote:

Ian Collins wrote:
....

malloc(0)

Specified as far as you will either get a pointer to a block of >0 by=

tes

or NULL, just like any other size.

That would be a problem then.


Why? What ever you get from malloc, you can pass to free.


Different behaviour on different systems. If I write code that assumes
malloc(0) returns unique values and it returns 0 on some, it will break.

I'm not sure if that's the only one but it is a source of inconsistency
between platforms.


And how is this different from new? If you allocate an array of
length 0 with new, it may fail, or it may return a unique
pointer, which can be copied and tested, but not deallocated.
Just like malloc.

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