🚀 go-pugleaf

In article <DKp9L9.234@ukpsshp1.serigate.philips.nl>
           baynes@ukpsshp1.serigate.philips.nl "Stephen Baynes" writes:

>This reminds me of a discussion over could calloc use the size parameter
>as a hint to give different alignment to malloc. For example:
>    calloc( N, sizeof( float ) )
>could recognize the sizeof float and give 64 bit alignment in this case.
>I recall the conclusion was that it could do this, but did not have to.

#include <stdio.h>
#include <stdlib.h>

#define NELEMS 500

int main(void)

{
    long *squares = calloc(NELEMS * sizeof(long), 1);

    if (squares != NULL) {
        int ind;

        for (ind = 0; ind < NELEMS; ind++)
            squares[ind] = (long)ind * ind;

        for (ind = 0; ind < NELEMS; ind++)
            printf("%ld\n", squares[ind]);

        free(squares);
    }

    return 0;
}

A conforming implementation must compile and run this program correctly.
Of course it could use such a 'hint' where the only result of sub-optimal
alignment is a performance hit.

-- 
-----------------------------------------
Lawrence Kirby | fred@genesis.demon.co.uk
Wilts, England | 70734.126@compuserve.com
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