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use alloc::boxed::FnBox;
use ffi::CStr;
use io;
use mem;
use sys_common::thread::start_thread;
use sys::{cvt, syscall};
use time::Duration;
pub struct Thread {
id: usize,
}
unsafe impl Send for Thread {}
unsafe impl Sync for Thread {}
impl Thread {
pub unsafe fn new<'a>(_stack: usize, p: Box<FnBox() + 'a>) -> io::Result<Thread> {
let p = box p;
let id = cvt(syscall::clone(syscall::CLONE_VM | syscall::CLONE_FS | syscall::CLONE_FILES))?;
if id == 0 {
start_thread(&*p as *const _ as *mut _);
let _ = syscall::exit(0);
panic!("thread failed to exit");
} else {
mem::forget(p);
Ok(Thread { id: id })
}
}
pub fn yield_now() {
let ret = syscall::sched_yield().expect("failed to sched_yield");
debug_assert_eq!(ret, 0);
}
pub fn set_name(_name: &CStr) {
}
pub fn sleep(dur: Duration) {
let mut secs = dur.as_secs();
let mut nsecs = dur.subsec_nanos() as i32;
while secs > 0 || nsecs > 0 {
let req = syscall::TimeSpec {
tv_sec: secs as i64,
tv_nsec: nsecs,
};
secs -= req.tv_sec as u64;
let mut rem = syscall::TimeSpec::default();
if syscall::nanosleep(&req, &mut rem).is_err() {
secs += rem.tv_sec as u64;
nsecs = rem.tv_nsec;
} else {
nsecs = 0;
}
}
}
pub fn join(self) {
let mut status = 0;
syscall::waitpid(self.id, &mut status, 0).unwrap();
}
pub fn id(&self) -> usize { self.id }
pub fn into_id(self) -> usize {
let id = self.id;
mem::forget(self);
id
}
}
pub mod guard {
pub unsafe fn current() -> Option<usize> { None }
pub unsafe fn init() -> Option<usize> { None }
}