How can you find the processor number a thread is running on?

Question

I have a memory heap manager which partitions the heap into different segments based on the number of processors on the system. Memory can only be allocated on the partitio

Answer 1

From output of man sched_getcpu:

NAME
       sched_getcpu - determine CPU on which the calling thread is running

SYNOPSIS
       #define _GNU_SOURCE
       #include 

       int sched_getcpu(void);

DESCRIPTION
   sched_getcpu() returns the number of the CPU
   on which the calling thread is currently executing.

RETURN VALUE
   On success, sched_getcpu() returns a non-negative CPU number.
   On error, -1 is returned and errno is set to indicate the error.

SEE ALSO
   getcpu(2)

Unfortunately, this is Linux specific. I doubt there is a portable way to do this.