| use super::unsupported; |
| use crate::ffi::CStr; |
| use crate::io; |
| use crate::num::NonZero; |
| use crate::ptr::NonNull; |
| use crate::time::Duration; |
| |
| pub struct Thread(!); |
| |
| pub const DEFAULT_MIN_STACK_SIZE: usize = 4096; |
| |
| impl Thread { |
| // unsafe: see thread::Builder::spawn_unchecked for safety requirements |
| pub unsafe fn new(_stack: usize, _p: Box<dyn FnOnce()>) -> io::Result<Thread> { |
| unsupported() |
| } |
| |
| pub fn yield_now() { |
| // do nothing |
| } |
| |
| pub fn set_name(_name: &CStr) { |
| // nope |
| } |
| |
| pub fn sleep(dur: Duration) { |
| let boot_services: NonNull<r_efi::efi::BootServices> = |
| crate::os::uefi::env::boot_services().expect("can't sleep").cast(); |
| let mut dur_ms = dur.as_micros(); |
| // ceil up to the nearest microsecond |
| if dur.subsec_nanos() % 1000 > 0 { |
| dur_ms += 1; |
| } |
| |
| while dur_ms > 0 { |
| let ms = crate::cmp::min(dur_ms, usize::MAX as u128); |
| let _ = unsafe { ((*boot_services.as_ptr()).stall)(ms as usize) }; |
| dur_ms -= ms; |
| } |
| } |
| |
| pub fn join(self) { |
| self.0 |
| } |
| } |
| |
| pub fn available_parallelism() -> io::Result<NonZero<usize>> { |
| // UEFI is single threaded |
| Ok(NonZero::new(1).unwrap()) |
| } |
| |
| pub mod guard { |
| pub type Guard = !; |
| pub unsafe fn current() -> Option<Guard> { |
| None |
| } |
| pub unsafe fn init() -> Option<Guard> { |
| None |
| } |
| } |