Getting per-thread CPU time on *BSD

[Harald Eilertsen]

Hi again,

I think it should be possible to get what you need via the
clock_gettime() call with the clock id returned by
pthread_getcpuclockid() for the target thread.

https://man.freebsd.org/cgi/man.cgi?query=clock_gettime
https://man.freebsd.org/cgi/man.cgi?query=pthread_getcpuclockid

>From what I can see these calls are also supported on OpenBSD and
NetBSD.

One note, though: These calls return (afaict) the acumulated sys+user
time of the thread in one timespec struct, not as separate sys+user
times.

If that's ok, I'm happy to try to implement it. Is there a test that can
be used to check the implementation?

Take Care!
Harald