library/std/src/sys/unsupported/thread.rs

   1 use super::unsupported;
   2 use crate::ffi::CStr;
   3 use crate::io;
   4 use crate::num::NonZeroUsize;
   5 use crate::time::Duration;
   6
   7 pub struct Thread(!);
   8
   9 pub const DEFAULT_MIN_STACK_SIZE: usize = 4096;
  10
  11 impl Thread {
  12     // unsafe: see thread::Builder::spawn_unchecked for safety requirements
  13     pub unsafe fn new(_stack: usize, _p: Box<dyn FnOnce()>) -> io::Result<Thread> {
  14         unsupported()
  15     }
  16
  17     pub fn yield_now() {
  18         // do nothing
  19     }
  20
  21     pub fn set_name(_name: &CStr) {
  22         // nope
  23     }
  24
  25     pub fn sleep(_dur: Duration) {
  26         panic!("can't sleep");
  27     }
  28
  29     pub fn join(self) {
  30         self.0
  31     }
  32 }
  33
  34 pub fn available_parallelism() -> io::Result<NonZeroUsize> {
  35     unsupported()
  36 }
  37
  38 pub mod guard {
  39     pub type Guard = !;
  40     pub unsafe fn current() -> Option<Guard> {
  41         None
  42     }
  43     pub unsafe fn init() -> Option<Guard> {
  44         None
  45     }
  46 }