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
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
use crate::io;
use crate::ffi::CStr;
use crate::mem;
use crate::ptr;
use crate::sys::c;
use crate::sys::handle::Handle;
use crate::sys_common::thread::*;
use crate::time::Duration;
use libc::c_void;
use super::to_u16s;
pub const DEFAULT_MIN_STACK_SIZE: usize = 2 * 1024 * 1024;
pub struct Thread {
handle: Handle
}
impl Thread {
pub unsafe fn new(stack: usize, p: Box<dyn FnOnce()>)
-> io::Result<Thread> {
let p = box p;
let stack_size = (stack + 0xfffe) & (!0xfffe);
let ret = c::CreateThread(ptr::null_mut(), stack_size,
thread_start, &*p as *const _ as *mut _,
c::STACK_SIZE_PARAM_IS_A_RESERVATION,
ptr::null_mut());
return if ret as usize == 0 {
Err(io::Error::last_os_error())
} else {
mem::forget(p);
Ok(Thread { handle: Handle::new(ret) })
};
extern "system" fn thread_start(main: *mut c_void) -> c::DWORD {
unsafe { start_thread(main as *mut u8); }
0
}
}
pub fn set_name(name: &CStr) {
if let Ok(utf8) = name.to_str() {
if let Ok(utf16) = to_u16s(utf8) {
unsafe { c::SetThreadDescription(c::GetCurrentThread(), utf16.as_ptr()); };
};
};
}
pub fn join(self) {
let rc = unsafe { c::WaitForSingleObject(self.handle.raw(), c::INFINITE) };
if rc == c::WAIT_FAILED {
panic!("failed to join on thread: {}",
io::Error::last_os_error());
}
}
pub fn yield_now() {
unsafe { c::SwitchToThread(); }
}
pub fn sleep(dur: Duration) {
unsafe {
c::Sleep(super::dur2timeout(dur))
}
}
pub fn handle(&self) -> &Handle { &self.handle }
pub fn into_handle(self) -> Handle { self.handle }
}
#[cfg_attr(test, allow(dead_code))]
pub mod guard {
pub type Guard = !;
pub unsafe fn current() -> Option<Guard> { None }
pub unsafe fn init() -> Option<Guard> { None }
}