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use core::prelude::*;
use thread::Thread;
use cell::RefCell;
use string::String;
struct ThreadInfo {
stack_bounds: (uint, uint),
stack_guard: uint,
thread: Thread,
}
thread_local! { static THREAD_INFO: RefCell<Option<ThreadInfo>> = RefCell::new(None) }
impl ThreadInfo {
fn with<R, F>(f: F) -> R where F: FnOnce(&mut ThreadInfo) -> R {
if THREAD_INFO.destroyed() {
panic!("Use of std::thread::Thread::current() is not possible after \
the thread's local data has been destroyed");
}
THREAD_INFO.with(move |c| {
if c.borrow().is_none() {
*c.borrow_mut() = Some(ThreadInfo {
stack_bounds: (0, 0),
stack_guard: 0,
thread: NewThread::new(None),
})
}
f(c.borrow_mut().as_mut().unwrap())
})
}
}
pub fn current_thread() -> Thread {
ThreadInfo::with(|info| info.thread.clone())
}
pub fn stack_guard() -> uint {
ThreadInfo::with(|info| info.stack_guard)
}
pub fn set(stack_bounds: (uint, uint), stack_guard: uint, thread: Thread) {
THREAD_INFO.with(|c| assert!(c.borrow().is_none()));
THREAD_INFO.with(move |c| *c.borrow_mut() = Some(ThreadInfo{
stack_bounds: stack_bounds,
stack_guard: stack_guard,
thread: thread,
}));
}
pub trait NewThread {
fn new(name: Option<String>) -> Self;
}