fn pthread_mach_thread_np()

in src/rt_mach.rs [12:30]

• 16 lines of code
• 1 McCabe index (conditional complexity)

    fn pthread_mach_thread_np(tid: pthread_t) -> mach_port_t;
    // Those functions are commented out in thread_policy.h but somehow it works just fine !?
    fn thread_policy_set(
        thread: thread_t,
        flavor: thread_policy_flavor_t,
        policy_info: thread_policy_t,
        count: mach_msg_type_number_t,
    ) -> kern_return_t;
    fn thread_policy_get(
        thread: thread_t,
        flavor: thread_policy_flavor_t,
        policy_info: thread_policy_t,
        count: &mut mach_msg_type_number_t,
        get_default: &mut boolean_t,
    ) -> kern_return_t;
}

// can't use size_of in const fn just now in stable, use a macro for now.
macro_rules! THREAD_TIME_CONSTRAINT_POLICY_COUNT {