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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 cast;
use libc;
use ops::Drop;
use unstable::raw;
use uint;
#[allow(non_camel_case_types)] // runtime type
type raw_thread = libc::c_void;
pub struct Thread {
priv main: ~fn(),
priv raw_thread: *raw_thread,
priv joined: bool
}
impl Thread {
#[fixed_stack_segment] #[inline(never)]
pub fn start(main: ~fn()) -> Thread {
// This is the starting point of rust os threads. The first thing we do
// is make sure that we don't trigger __morestack (also why this has a
// no_split_stack annotation), and then we re-build the main function
// and invoke it from there.
#[no_split_stack]
extern "C" fn thread_start(code: *(), env: *()) {
use rt::context;
unsafe {
context::record_stack_bounds(0, uint::max_value);
let f: &fn() = cast::transmute(raw::Closure {
code: code,
env: env,
});
f();
}
}
let raw_thread = unsafe {
let c: raw::Closure = cast::transmute_copy(&main);
let raw::Closure { code, env } = c;
rust_raw_thread_start(thread_start, code, env)
};
Thread {
main: main,
raw_thread: raw_thread,
joined: false,
}
}
pub fn join(mut self) {
#[fixed_stack_segment]; #[inline(never)];
assert!(!self.joined);
unsafe { rust_raw_thread_join(self.raw_thread); }
self.joined = true;
}
}
impl Drop for Thread {
fn drop(&mut self) {
#[fixed_stack_segment]; #[inline(never)];
assert!(self.joined);
unsafe { rust_raw_thread_delete(self.raw_thread) }
}
}
extern {
fn rust_raw_thread_start(f: extern "C" fn(*(), *()),
code: *(), env: *()) -> *raw_thread;
fn rust_raw_thread_join(thread: *raw_thread);
fn rust_raw_thread_delete(thread: *raw_thread);
}
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