On Tue, Sep 9, 2008 at 1:29 PM, kumars <[EMAIL PROTECTED]> wrote:
>
> Could anyone tell me why the piece of code below is giving segmentation
> fault, and how to correct this.....
>
> #include <stdio.h>
>
> #define buffer_size 2000000000
> #define num_writers 300
> #define num_readers 500
>
> int main()
> {
> char *ptr;
> char *shmptr[num_writers];
You declare an array of pointers here...
> int i, numr, numw, nump;
>
> unsigned long cksum = 0;
>
> numr = nump % num_readers;
> numw = nump - numr;
> numw = numw / num_readers;
> ptr = shmptr[numw];
But then here you access a member of this array without allocating
memory for any of the pointers in the array.... that would be first
guess. You also don't put any data into shmptr (which you can't do
until you allocate memory)
-- Brett
------------------------------------------------------------
"In the rhythm of music a secret is hidden;
If I were to divulge it, it would overturn the world."
-- Jelaleddin Rumi
