1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
use crate::ffi::{c_int, c_void};
use crate::ptr;
use crate::time::Duration;
use libc::{_lwp_self, clockid_t, lwpid_t, time_t, timespec, CLOCK_MONOTONIC};
extern "C" {
fn ___lwp_park60(
clock_id: clockid_t,
flags: c_int,
ts: *mut timespec,
unpark: lwpid_t,
hint: *const c_void,
unparkhint: *const c_void,
) -> c_int;
fn _lwp_unpark(lwp: lwpid_t, hint: *const c_void) -> c_int;
}
pub type ThreadId = lwpid_t;
#[inline]
pub fn current() -> ThreadId {
unsafe { _lwp_self() }
}
#[inline]
pub fn park(hint: usize) {
unsafe {
___lwp_park60(0, 0, ptr::null_mut(), 0, ptr::invalid(hint), ptr::null());
}
}
pub fn park_timeout(dur: Duration, hint: usize) {
let mut timeout = timespec {
// Saturate so that the operation will definitely time out
// (even if it is after the heat death of the universe).
tv_sec: dur.as_secs().try_into().ok().unwrap_or(time_t::MAX),
tv_nsec: dur.subsec_nanos().into(),
};
// Timeout needs to be mutable since it is modified on NetBSD 9.0 and
// above.
unsafe {
___lwp_park60(CLOCK_MONOTONIC, 0, &mut timeout, 0, ptr::invalid(hint), ptr::null());
}
}
#[inline]
pub fn unpark(tid: ThreadId, hint: usize) {
unsafe {
_lwp_unpark(tid, ptr::invalid(hint));
}
}
|
