A question about TBB/C++ code
- by Jackie
I am reading The thread building block book. I do not understand this piece of code:
FibTask& a=*new(allocate_child()) FibTask(n-1,&x);
FibTask& b=*new(allocate_child()) FibTask(n-2,&y);
What do these directive mean? class object reference and new work together? Thanks for explanation.
The following code is the defination of this class FibTask.
class FibTask: public task
{
public:
const long n;
long* const sum;
FibTask(long n_,long* sum_):n(n_),sum(sum_)
{}
task* execute()
{
if(n
FibTask& a=*new(allocate_child()) FibTask(n-1,&x);
FibTask& b=*new(allocate_child()) FibTask(n-2,&y);
set_ref_count(3);
spawn(b);
spawn_and_wait_for_all(a);
*sum=x+y;
}
return 0;
}
};
