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Need to Allocate more space than size_t

hi folks
i have a peculiar problem. i have to allocate more than size_t
consequtive bytes on a system . after i do a malloc .. i am unable to
do a realloc because it takes size_t as a new size and not as an
incremental size..
can you tell me which library/system call to use..
Plz consider that all the physical hardware req for such an operation
is available... i know this sounds crazy... but just help me out here
....
Thanks in Advance
Rahul

Nov 14 '06
20 2646
Frederick Gotham wrote:
Tor Rustad:
Frederick Gotham wrote:
Solutions:

(1) Unfortunately, you'll have to resort to
implementation-specific means.
The problem is that OP's implementation doesn't
support his HW archtecture.


If you're supposed to be able to allocate a terrabyte of
memory without resorting to implementation-specific means,
then "size_t" should be able to hold a large enough value.
FYI, *size_t* is NOT likely to be the main problem.

If this is indeed intended, then the implementation is
flawed in that size_t isn't big enough.
Why even consider the implementation is flawed?

Even if that was the case... is there really a way to fix
it, without having the compiler sources?

(2) You'll have to contact your compiler manufacturer
and ask for a fix, or perhaps try fix it yourself (e.g.
altering the size_t typedef)
How is changing size_t typedef gonna help?


Perhaps it's defined(Do you "declare" or do you "define" a
typedef?) as follows in his/her system headers:

typedef long unsigned size_t;
And I ask once more, what is the purpose of doing this?

What are you gonna use this new size_t for?

Of course, this might mess up his/her entire system.
Yes, invoking undefined behavior might do that.

--
Tor <torust AT online DOT no>

Nov 15 '06 #21

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