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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.
#[allow(non_camel_case_types)];
use cast;
use libc;
use ops::Drop;
use uint;
use ptr;
#[cfg(windows)]
use libc::types::os::arch::extra::{LPSECURITY_ATTRIBUTES, SIZE_T,
LPVOID, DWORD, LPDWORD, HANDLE};
#[cfg(windows)] type rust_thread = HANDLE;
#[cfg(unix)] type rust_thread = libc::pthread_t;
pub struct Thread {
priv native: rust_thread,
priv joined: bool
}
static DEFAULT_STACK_SIZE: libc::size_t = 1024*1024;
#[cfg(windows)] type rust_thread_return = DWORD;
#[cfg(unix)] type rust_thread_return = *libc::c_void;
impl Thread {
pub fn start(main: proc()) -> 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 extract the main function
// and invoke it.
#[no_split_stack]
extern "C" fn thread_start(trampoline: *libc::c_void) -> rust_thread_return {
use rt::context;
unsafe {
context::record_stack_bounds(0, uint::max_value);
let f: ~proc() = cast::transmute(trampoline);
(*f)();
}
unsafe { cast::transmute(0) }
}
let native = native_thread_create(thread_start, ~main);
Thread {
native: native,
joined: false,
}
}
pub fn join(mut self) {
assert!(!self.joined);
native_thread_join(self.native);
self.joined = true;
}
}
#[cfg(windows)]
fn native_thread_create(thread_start: extern "C" fn(*libc::c_void) -> rust_thread_return,
tramp: ~proc()) -> rust_thread {
unsafe {
let ptr: *mut libc::c_void = cast::transmute(tramp);
CreateThread(ptr::mut_null(), DEFAULT_STACK_SIZE, thread_start, ptr, 0, ptr::mut_null())
}
}
#[cfg(windows)]
fn native_thread_join(native: rust_thread) {
use libc::consts::os::extra::INFINITE;
unsafe { WaitForSingleObject(native, INFINITE); }
}
#[cfg(unix)]
fn native_thread_create(thread_start: extern "C" fn(*libc::c_void) -> rust_thread_return,
tramp: ~proc()) -> rust_thread {
use unstable::intrinsics;
let mut native: libc::pthread_t = unsafe { intrinsics::uninit() };
unsafe {
use libc::consts::os::posix01::PTHREAD_CREATE_JOINABLE;
let mut attr: libc::pthread_attr_t = intrinsics::uninit();
assert!(pthread_attr_init(&mut attr) == 0);
assert!(pthread_attr_setstacksize(&mut attr, DEFAULT_STACK_SIZE) == 0);
assert!(pthread_attr_setdetachstate(&mut attr, PTHREAD_CREATE_JOINABLE) == 0);
let ptr: *libc::c_void = cast::transmute(tramp);
assert!(pthread_create(&mut native, &attr, thread_start, ptr) == 0);
}
native
}
#[cfg(unix)]
fn native_thread_join(native: rust_thread) {
unsafe { assert!(pthread_join(native, ptr::null()) == 0) }
}
impl Drop for Thread {
fn drop(&mut self) {
assert!(self.joined);
}
}
#[cfg(windows)]
extern "system" {
fn CreateThread(lpThreadAttributes: LPSECURITY_ATTRIBUTES, dwStackSize: SIZE_T,
lpStartAddress: extern "C" fn(*libc::c_void) -> rust_thread_return,
lpParameter: LPVOID, dwCreationFlags: DWORD, lpThreadId: LPDWORD) -> HANDLE;
fn WaitForSingleObject(hHandle: HANDLE, dwMilliseconds: DWORD) -> DWORD;
}
#[cfg(unix)]
extern {
fn pthread_create(native: *mut libc::pthread_t, attr: *libc::pthread_attr_t,
f: extern "C" fn(*libc::c_void) -> rust_thread_return,
value: *libc::c_void) -> libc::c_int;
fn pthread_join(native: libc::pthread_t, value: **libc::c_void) -> libc::c_int;
fn pthread_attr_init(attr: *mut libc::pthread_attr_t) -> libc::c_int;
fn pthread_attr_setstacksize(attr: *mut libc::pthread_attr_t,
stack_size: libc::size_t) -> libc::c_int;
fn pthread_attr_setdetachstate(attr: *mut libc::pthread_attr_t,
state: libc::c_int) -> libc::c_int;
}
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