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Re: Does heap segment of a C program increases in the amount of RAM or is it fixed to a limit?

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On 3/27/2017 11:06 AM, James R. Kuyper wrote:
> On 03/27/2017 04:23 AM, acidlategamer@gmail.com wrote:
[...]
>> 2.    When you use calloc instead of malloc, it zeroes out all the memory
>> you requested. This is equivalent to using it.
>
> It's not "equivalent" to using it; it IS using it.

Nit:

I have seen malloc implementations which allow the user to configure which 
method of allocation is used.  Typically, this is good for debugging 
purposes.  For example, each allocation can be placed in its own MMU 
segment, allowing buffer overrun/underrun errors to be caught in hardware.

In such an implementation, it should be possible for the MMU to allocate an 
"all-zeros" segment of memory.

But, as far as C is concerned, in order to guarantee all zeros, it's "as if" 
the memory was written to.

-- 
Kenneth Brody

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Does heap segment of a C program increases in the amount of RAM or is it fixed to a limit? acidlategamer@gmail.com - 2017-03-27 01:23 -0700
  Re: Does heap segment of a C program increases in the amount of RAM or is it fixed to a limit? "James R. Kuyper" <jameskuyper@verizon.net> - 2017-03-27 11:06 -0400
    Re: Does heap segment of a C program increases in the amount of RAM or is it fixed to a limit? Ken Brody <kenbrody@spamcop.net> - 2017-03-27 14:50 -0400
    Re: Does heap segment of a C program increases in the amount of RAM or is it fixed to a limit? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-03-27 21:17 +0100
      Re: Does heap segment of a C program increases in the amount of RAM or is it fixed to a limit? Robert Wessel <robertwessel2@yahoo.com> - 2017-03-27 19:08 -0500
  Re: Does heap segment of a C program increases in the amount of RAM or is it fixed to a limit? scott@slp53.sl.home (Scott Lurndal) - 2017-03-27 15:23 +0000
    Re: Does heap segment of a C program increases in the amount of RAM or is it fixed to a limit? "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2017-03-27 09:57 -0700
      Re: Does heap segment of a C program increases in the amount of RAM or is it fixed to a limit? BartC <bc@freeuk.com> - 2017-03-27 18:14 +0100
  Re: Does heap segment of a C program increases in the amount of RAM or is it fixed to a limit? gordonb.l1p2g@burditt.org (Gordon Burditt) - 2017-03-27 12:37 -0500
    Re: Does heap segment of a C program increases in the amount of RAM or is it fixed to a limit? "James R. Kuyper" <jameskuyper@verizon.net> - 2017-03-27 13:53 -0400
    Re: Does heap segment of a C program increases in the amount of RAM or is it fixed to a limit? scott@slp53.sl.home (Scott Lurndal) - 2017-03-27 18:06 +0000
    Re: Does heap segment of a C program increases in the amount of RAM or is it fixed to a limit? supercat@casperkitty.com - 2017-03-27 12:29 -0700
      Re: Does heap segment of a C program increases in the amount of RAM or is it fixed to a limit? Robert Wessel <robertwessel2@yahoo.com> - 2017-03-27 19:04 -0500
        Re: Does heap segment of a C program increases in the amount of RAM or is it fixed to a limit? supercat@casperkitty.com - 2017-03-27 17:31 -0700
          Re: Does heap segment of a C program increases in the amount of RAM or is it fixed to a limit? Ian Collins <ian-news@hotmail.com> - 2017-03-28 13:35 +1300
        Re: Does heap segment of a C program increases in the amount of RAM or is it fixed to a limit? Ian Collins <ian-news@hotmail.com> - 2017-03-28 13:37 +1300

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