1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 use alloc::boxed::FnBox;
18 use sys::handle::Handle;
19 use sys_common::thread::*;
27 pub unsafe fn new<'a>(stack: usize, p: Box<FnBox() + 'a>)
28 -> io::Result<Thread> {
31 // FIXME On UNIX, we guard against stack sizes that are too small but
32 // that's because pthreads enforces that stacks are at least
33 // PTHREAD_STACK_MIN bytes big. Windows has no such lower limit, it's
34 // just that below a certain threshold you can't do anything useful.
35 // That threshold is application and architecture-specific, however.
36 // Round up to the next 64 kB because that's what the NT kernel does,
37 // might as well make it explicit.
38 let stack_size = (stack + 0xfffe) & (!0xfffe);
39 let ret = c::CreateThread(ptr::null_mut(), stack_size,
40 thread_start, &*p as *const _ as *mut _,
43 return if ret as usize == 0 {
44 Err(io::Error::last_os_error())
46 mem::forget(p); // ownership passed to CreateThread
47 Ok(Thread { handle: Handle::new(ret) })
50 extern "system" fn thread_start(main: *mut c_void) -> c::DWORD {
51 unsafe { start_thread(main); }
56 pub fn set_name(_name: &CStr) {
57 // Windows threads are nameless
58 // The names in MSVC debugger are obtained using a "magic" exception,
59 // which requires a use of MS C++ extensions.
60 // See https://msdn.microsoft.com/en-us/library/xcb2z8hs.aspx
64 unsafe { c::WaitForSingleObject(self.handle.raw(), c::INFINITE); }
68 // This function will return 0 if there are no other threads to execute,
69 // but this also means that the yield was useless so this isn't really a
70 // case that needs to be worried about.
71 unsafe { c::SwitchToThread(); }
74 pub fn sleep(dur: Duration) {
76 c::Sleep(super::dur2timeout(dur))
80 pub fn handle(&self) -> &Handle { &self.handle }
82 pub fn into_handle(self) -> Handle { self.handle }
85 #[cfg_attr(test, allow(dead_code))]
87 pub unsafe fn current() -> Option<usize> { None }
88 pub unsafe fn init() -> Option<usize> { None }