d4a2c94180
This commit cleans out a large amount of deprecated APIs from the standard library and some of the facade crates as well, updating all users in the compiler and in tests as it goes along.
338 lines
9.1 KiB
Rust
338 lines
9.1 KiB
Rust
// Copyright 2012-2014 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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//
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// ignore-lexer-test FIXME #15883
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#![feature(unsafe_destructor, std_misc)]
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pub type Task = isize;
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// tjc: I don't know why
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pub mod pipes {
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use self::state::{empty, full, blocked, terminated};
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use super::Task;
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use std::mem::{forget, transmute};
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use std::mem::{replace, swap};
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use std::mem;
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use std::thread;
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use std::marker::Send;
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pub struct Stuff<T> {
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state: state,
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blocked_task: Option<Task>,
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payload: Option<T>
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}
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#[derive(PartialEq, Debug)]
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#[repr(isize)]
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pub enum state {
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empty,
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full,
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blocked,
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terminated
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}
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pub struct packet<T> {
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state: state,
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blocked_task: Option<Task>,
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payload: Option<T>
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}
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unsafe impl<T:Send> Send for packet<T> {}
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pub fn packet<T:Send>() -> *const packet<T> {
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unsafe {
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let p: *const packet<T> = mem::transmute(Box::new(Stuff{
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state: empty,
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blocked_task: None::<Task>,
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payload: None::<T>
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}));
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p
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}
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}
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mod rusti {
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pub fn atomic_xchg(_dst: &mut isize, _src: isize) -> isize { panic!(); }
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pub fn atomic_xchg_acq(_dst: &mut isize, _src: isize) -> isize { panic!(); }
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pub fn atomic_xchg_rel(_dst: &mut isize, _src: isize) -> isize { panic!(); }
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}
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// We should consider moving this to ::std::unsafe, although I
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// suspect graydon would want us to use void pointers instead.
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pub unsafe fn uniquify<T>(x: *const T) -> Box<T> {
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mem::transmute(x)
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}
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pub fn swap_state_acq(dst: &mut state, src: state) -> state {
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unsafe {
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transmute(rusti::atomic_xchg_acq(transmute(dst), src as isize))
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}
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}
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pub fn swap_state_rel(dst: &mut state, src: state) -> state {
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unsafe {
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transmute(rusti::atomic_xchg_rel(transmute(dst), src as isize))
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}
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}
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pub fn send<T:Send>(mut p: send_packet<T>, payload: T) {
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let p = p.unwrap();
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let mut p = unsafe { uniquify(p) };
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assert!((*p).payload.is_none());
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(*p).payload = Some(payload);
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let old_state = swap_state_rel(&mut (*p).state, full);
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match old_state {
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empty => {
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// Yay, fastpath.
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// The receiver will eventually clean this up.
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unsafe { forget(p); }
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}
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full => { panic!("duplicate send") }
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blocked => {
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// The receiver will eventually clean this up.
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unsafe { forget(p); }
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}
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terminated => {
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// The receiver will never receive this. Rely on drop_glue
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// to clean everything up.
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}
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}
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}
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pub fn recv<T:Send>(mut p: recv_packet<T>) -> Option<T> {
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let p = p.unwrap();
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let mut p = unsafe { uniquify(p) };
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loop {
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let old_state = swap_state_acq(&mut (*p).state,
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blocked);
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match old_state {
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empty | blocked => { thread::yield_now(); }
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full => {
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let payload = replace(&mut p.payload, None);
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return Some(payload.unwrap())
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}
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terminated => {
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assert_eq!(old_state, terminated);
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return None;
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}
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}
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}
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}
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pub fn sender_terminate<T:Send>(p: *const packet<T>) {
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let mut p = unsafe { uniquify(p) };
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match swap_state_rel(&mut (*p).state, terminated) {
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empty | blocked => {
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// The receiver will eventually clean up.
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unsafe { forget(p) }
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}
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full => {
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// This is impossible
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panic!("you dun goofed")
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}
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terminated => {
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// I have to clean up, use drop_glue
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}
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}
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}
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pub fn receiver_terminate<T:Send>(p: *const packet<T>) {
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let mut p = unsafe { uniquify(p) };
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match swap_state_rel(&mut (*p).state, terminated) {
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empty => {
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// the sender will clean up
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unsafe { forget(p) }
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}
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blocked => {
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// this shouldn't happen.
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panic!("terminating a blocked packet")
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}
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terminated | full => {
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// I have to clean up, use drop_glue
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}
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}
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}
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pub struct send_packet<T:Send> {
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p: Option<*const packet<T>>,
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}
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#[unsafe_destructor]
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impl<T:Send> Drop for send_packet<T> {
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fn drop(&mut self) {
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unsafe {
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if self.p != None {
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let self_p: &mut Option<*const packet<T>> =
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mem::transmute(&self.p);
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let p = replace(self_p, None);
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sender_terminate(p.unwrap())
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}
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}
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}
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}
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impl<T:Send> send_packet<T> {
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pub fn unwrap(&mut self) -> *const packet<T> {
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replace(&mut self.p, None).unwrap()
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}
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}
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pub fn send_packet<T:Send>(p: *const packet<T>) -> send_packet<T> {
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send_packet {
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p: Some(p)
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}
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}
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pub struct recv_packet<T:Send> {
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p: Option<*const packet<T>>,
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}
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#[unsafe_destructor]
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impl<T:Send> Drop for recv_packet<T> {
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fn drop(&mut self) {
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unsafe {
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if self.p != None {
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let self_p: &mut Option<*const packet<T>> =
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mem::transmute(&self.p);
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let p = replace(self_p, None);
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receiver_terminate(p.unwrap())
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}
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}
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}
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}
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impl<T:Send> recv_packet<T> {
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pub fn unwrap(&mut self) -> *const packet<T> {
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replace(&mut self.p, None).unwrap()
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}
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}
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pub fn recv_packet<T:Send>(p: *const packet<T>) -> recv_packet<T> {
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recv_packet {
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p: Some(p)
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}
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}
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pub fn entangle<T:Send>() -> (send_packet<T>, recv_packet<T>) {
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let p = packet();
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(send_packet(p), recv_packet(p))
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}
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}
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pub mod pingpong {
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use std::mem;
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pub struct ping(::pipes::send_packet<pong>);
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unsafe impl Send for ping {}
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pub struct pong(::pipes::send_packet<ping>);
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unsafe impl Send for pong {}
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pub fn liberate_ping(p: ping) -> ::pipes::send_packet<pong> {
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unsafe {
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let _addr : *const ::pipes::send_packet<pong> = match &p {
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&ping(ref x) => { mem::transmute(x) }
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};
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panic!()
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}
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}
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pub fn liberate_pong(p: pong) -> ::pipes::send_packet<ping> {
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unsafe {
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let _addr : *const ::pipes::send_packet<ping> = match &p {
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&pong(ref x) => { mem::transmute(x) }
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};
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panic!()
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}
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}
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pub fn init() -> (client::ping, server::ping) {
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::pipes::entangle()
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}
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pub mod client {
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use pingpong;
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pub type ping = ::pipes::send_packet<pingpong::ping>;
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pub type pong = ::pipes::recv_packet<pingpong::pong>;
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pub fn do_ping(c: ping) -> pong {
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let (sp, rp) = ::pipes::entangle();
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::pipes::send(c, pingpong::ping(sp));
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rp
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}
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pub fn do_pong(c: pong) -> (ping, ()) {
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let packet = ::pipes::recv(c);
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if packet.is_none() {
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panic!("sender closed the connection")
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}
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(pingpong::liberate_pong(packet.unwrap()), ())
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}
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}
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pub mod server {
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use pingpong;
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pub type ping = ::pipes::recv_packet<pingpong::ping>;
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pub type pong = ::pipes::send_packet<pingpong::pong>;
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pub fn do_ping(c: ping) -> (pong, ()) {
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let packet = ::pipes::recv(c);
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if packet.is_none() {
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panic!("sender closed the connection")
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}
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(pingpong::liberate_ping(packet.unwrap()), ())
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}
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pub fn do_pong(c: pong) -> ping {
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let (sp, rp) = ::pipes::entangle();
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::pipes::send(c, pingpong::pong(sp));
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rp
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}
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}
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}
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fn client(chan: pingpong::client::ping) {
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let chan = pingpong::client::do_ping(chan);
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println!("Sent ping");
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let (_chan, _data) = pingpong::client::do_pong(chan);
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println!("Received pong");
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}
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fn server(chan: pingpong::server::ping) {
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let (chan, _data) = pingpong::server::do_ping(chan);
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println!("Received ping");
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let _chan = pingpong::server::do_pong(chan);
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println!("Sent pong");
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}
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pub fn main() {
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/*
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// Commented out because of option::get error
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let (client_, server_) = pingpong::init();
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task::spawn {|client_|
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let client__ = client_.take();
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client(client__);
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};
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task::spawn {|server_|
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let server__ = server_.take();
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server(server_ˊ);
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};
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*/
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}
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