530909f2d8
This routine is currently only used to clean up the timer helper thread in the libnative implementation, but there are possibly other uses for this. The documentation is clear that the procedures are *not* run with any task context and hence have very little available to them. I also opted to disallow at_exit inside of at_exit and just abort the process at that point.
66 lines
1.6 KiB
Rust
66 lines
1.6 KiB
Rust
// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! Implementation of running at_exit routines
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//!
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//! Documentation can be found on the `rt::at_exit` function.
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use cast;
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use option::{Some, None};
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use ptr::RawPtr;
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use unstable::sync::Exclusive;
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use util;
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type Queue = Exclusive<~[proc()]>;
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static mut QUEUE: *mut Queue = 0 as *mut Queue;
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static mut RUNNING: bool = false;
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pub fn init() {
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unsafe {
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rtassert!(!RUNNING);
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rtassert!(QUEUE.is_null());
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let state: ~Queue = ~Exclusive::new(~[]);
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QUEUE = cast::transmute(state);
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}
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}
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pub fn push(f: proc()) {
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unsafe {
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rtassert!(!RUNNING);
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rtassert!(!QUEUE.is_null());
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let state: &mut Queue = cast::transmute(QUEUE);
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let mut f = Some(f);
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state.with(|arr| {
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arr.push(f.take_unwrap());
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});
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}
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}
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pub fn run() {
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let vec = unsafe {
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rtassert!(!RUNNING);
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rtassert!(!QUEUE.is_null());
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RUNNING = true;
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let state: ~Queue = cast::transmute(QUEUE);
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QUEUE = 0 as *mut Queue;
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let mut vec = None;
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state.with(|arr| {
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vec = Some(util::replace(arr, ~[]));
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});
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vec.take_unwrap()
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};
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for f in vec.move_iter() {
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f();
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}
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}
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