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// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use option::Option;
use rt::task::Task;
use rt::local_ptr;
/// Encapsulates some task-local data.
pub trait Local<Borrowed> {
fn put(value: ~Self);
fn take() -> ~Self;
fn try_take() -> Option<~Self>;
fn exists(unused_value: Option<Self>) -> bool;
fn borrow(unused_value: Option<Self>) -> Borrowed;
unsafe fn unsafe_take() -> ~Self;
unsafe fn unsafe_borrow() -> *mut Self;
unsafe fn try_unsafe_borrow() -> Option<*mut Self>;
}
#[allow(visible_private_types)]
impl Local<local_ptr::Borrowed<Task>> for Task {
#[inline]
fn put(value: ~Task) { unsafe { local_ptr::put(value) } }
#[inline]
fn take() -> ~Task { unsafe { local_ptr::take() } }
#[inline]
fn try_take() -> Option<~Task> { unsafe { local_ptr::try_take() } }
fn exists(_: Option<Task>) -> bool { local_ptr::exists() }
#[inline]
fn borrow(_: Option<Task>) -> local_ptr::Borrowed<Task> {
unsafe {
local_ptr::borrow::<Task>()
}
}
#[inline]
unsafe fn unsafe_take() -> ~Task { local_ptr::unsafe_take() }
#[inline]
unsafe fn unsafe_borrow() -> *mut Task { local_ptr::unsafe_borrow() }
#[inline]
unsafe fn try_unsafe_borrow() -> Option<*mut Task> {
local_ptr::try_unsafe_borrow()
}
}
#[cfg(test)]
mod test {
use option::{None, Option};
use unstable::run_in_bare_thread;
use super::*;
use rt::task::Task;
#[test]
fn thread_local_task_smoke_test() {
run_in_bare_thread(proc() {
let task = ~Task::new();
Local::put(task);
let task: ~Task = Local::take();
cleanup_task(task);
});
}
#[test]
fn thread_local_task_two_instances() {
run_in_bare_thread(proc() {
let task = ~Task::new();
Local::put(task);
let task: ~Task = Local::take();
cleanup_task(task);
let task = ~Task::new();
Local::put(task);
let task: ~Task = Local::take();
cleanup_task(task);
});
}
#[test]
fn borrow_smoke_test() {
run_in_bare_thread(proc() {
let task = ~Task::new();
Local::put(task);
unsafe {
let _task: *mut Task = Local::unsafe_borrow();
}
let task: ~Task = Local::take();
cleanup_task(task);
});
}
#[test]
fn borrow_with_return() {
run_in_bare_thread(proc() {
let task = ~Task::new();
Local::put(task);
{
let _ = Local::borrow(None::<Task>);
}
let task: ~Task = Local::take();
cleanup_task(task);
});
}
#[test]
fn try_take() {
run_in_bare_thread(proc() {
let task = ~Task::new();
Local::put(task);
let t: ~Task = Local::try_take().unwrap();
let u: Option<~Task> = Local::try_take();
assert!(u.is_none());
cleanup_task(t);
});
}
fn cleanup_task(mut t: ~Task) {
t.destroyed = true;
}
}
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