The following code would not perform as expected due to the fact that each thread has its own dedicated stack, and is thus inaccessible to other threads. Assume threadfunc was just invoked as a result of a call to pthread$\_$create$().$

static struct data $*$ dataptr;

void $*$ threadfunc$($void $*$ arg$)\{$

$$ pthread$\_$t workthr;

$$ void $*$ workprod;

$$ struct data $*$ indata $=($struct data $*)$arg;

$$ struct data mydata $=*$indata;

$//$ modify "mydata" here...

$$dataptr $=$ &mydata;

$$ pthread$\_$create$($&workthr, NULL, workthrfunc, NULL$)$;

$$ pthread$\_$join$($workthr$,$ &workprod$)$;

$//$ process "workprod" here...

$\}$