Move port_set and shared_chan into core.
This commit is contained in:
Eric Holk
parent
ba10819800
commit
fec8059ed5
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@ -3,6 +3,19 @@
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import unsafe::{forget, reinterpret_cast, transmute};
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import either::{either, left, right};
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import option::unwrap;
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import arc::methods;
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/* Use this after the snapshot
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macro_rules! move {
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{ $x:expr } => { unsafe { let y <- *ptr::addr_of($x); y } }
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}
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*/
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fn macros() {
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#macro[
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[#move(x), { unsafe { let y <- *ptr::addr_of(x); y } }]
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];
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}
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enum state {
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empty,
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@ -455,11 +468,6 @@ enum port<T:send> {
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fn stream<T:send>() -> (chan<T>, port<T>) {
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let (c, s) = streamp::init();
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#macro[
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[#move[x],
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unsafe { let y <- *ptr::addr_of(x); y }]
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];
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(chan_({ mut endp: some(c) }), port_({ mut endp: some(s) }))
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}
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@ -506,3 +514,69 @@ impl port<T: send> for port<T> {
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peek
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}
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}
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// Treat a whole bunch of ports as one.
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class port_set<T: send> {
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let mut ports: ~[pipes::port<T>];
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new() { self.ports = ~[]; }
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fn add(+port: pipes::port<T>) {
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vec::push(self.ports, port)
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}
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fn try_recv() -> option<T> {
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let mut result = none;
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while result == none && self.ports.len() > 0 {
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let i = pipes::wait_many(self.ports.map(|p| p.header()));
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// dereferencing an unsafe pointer nonsense to appease the
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// borrowchecker.
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alt unsafe {(*ptr::addr_of(self.ports[i])).try_recv()} {
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some(m) {
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result = some(#move(m));
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}
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none {
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// Remove this port.
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let mut ports = ~[];
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self.ports <-> ports;
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vec::consume(ports,
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|j, x| if i != j { vec::push(self.ports, x) });
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}
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}
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}
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result
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}
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fn recv() -> T {
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option::unwrap(self.try_recv())
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}
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}
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impl private_methods/&<T: send> for pipes::port<T> {
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pure fn header() -> *pipes::packet_header unchecked {
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alt self.endp {
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some(endp) {
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endp.header()
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}
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none { fail "peeking empty stream" }
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}
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}
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}
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type shared_chan<T: send> = arc::exclusive<pipes::chan<T>>;
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impl chan<T: send> for shared_chan<T> {
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fn send(+x: T) {
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let mut xx = some(x);
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do self.with |_c, chan| {
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let mut x = none;
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x <-> xx;
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chan.send(option::unwrap(x))
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}
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}
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}
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fn shared_chan<T:send>(+c: pipes::chan<T>) -> shared_chan<T> {
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arc::exclusive(c)
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}
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@ -13,7 +13,7 @@ import io::writer;
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import io::writer_util;
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import arc::methods;
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import pipes::{port, chan};
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import pipes::{port, chan, shared_chan};
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macro_rules! move {
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{ $x:expr } => { unsafe { let y <- *ptr::addr_of($x); y } }
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@ -96,113 +96,3 @@ fn main(args: ~[str]) {
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#debug("%?", args);
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run(args);
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}
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// Treat a whole bunch of ports as one.
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class box<T> {
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let mut contents: option<T>;
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new(+x: T) { self.contents = some(x); }
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fn swap(f: fn(+T) -> T) {
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let mut tmp = none;
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self.contents <-> tmp;
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self.contents = some(f(option::unwrap(tmp)));
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}
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fn unwrap() -> T {
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let mut tmp = none;
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self.contents <-> tmp;
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option::unwrap(tmp)
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}
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}
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class port_set<T: send> {
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let mut ports: ~[pipes::port<T>];
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new() { self.ports = ~[]; }
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fn add(+port: pipes::port<T>) {
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vec::push(self.ports, port)
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}
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fn try_recv() -> option<T> {
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let mut result = none;
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while result == none && self.ports.len() > 0 {
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let i = pipes::wait_many(self.ports.map(|p| p.header()));
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// dereferencing an unsafe pointer nonsense to appease the
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// borrowchecker.
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alt unsafe {(*ptr::addr_of(self.ports[i])).try_recv()} {
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some(m) {
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result = some(move!{m});
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}
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none {
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// Remove this port.
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let mut ports = ~[];
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self.ports <-> ports;
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vec::consume(ports,
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|j, x| if i != j { vec::push(self.ports, x) });
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}
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}
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}
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/*
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while !done {
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do self.ports.swap |ports| {
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if ports.len() > 0 {
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let old_len = ports.len();
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let (_, m, ports) = pipes::select(ports);
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alt m {
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some(pipes::streamp::data(x, next)) {
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result = some(move!{x});
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done = true;
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assert ports.len() == old_len - 1;
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vec::append_one(ports, move!{next})
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}
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none {
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//#error("pipe closed");
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assert ports.len() == old_len - 1;
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ports
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}
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}
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}
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else {
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//#error("no more pipes");
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done = true;
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~[]
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}
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}
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}
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*/
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result
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}
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fn recv() -> T {
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option::unwrap(self.try_recv())
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}
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}
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impl private_methods/&<T: send> for pipes::port<T> {
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pure fn header() -> *pipes::packet_header unchecked {
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alt self.endp {
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some(endp) {
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endp.header()
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}
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none { fail "peeking empty stream" }
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}
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}
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}
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type shared_chan<T: send> = arc::exclusive<pipes::chan<T>>;
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impl chan<T: send> for shared_chan<T> {
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fn send(+x: T) {
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let mut xx = some(x);
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do self.with |_c, chan| {
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let mut x = none;
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x <-> xx;
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chan.send(option::unwrap(x))
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}
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}
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}
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fn shared_chan<T:send>(+c: pipes::chan<T>) -> shared_chan<T> {
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arc::exclusive(c)
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}
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@ -8,7 +8,7 @@ use std;
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import io::writer;
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import io::writer_util;
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import pipes::{port, chan};
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import pipes::{port, port_set, chan};
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macro_rules! move {
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{ $x:expr } => { unsafe { let y <- *ptr::addr_of($x); y } }
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@ -92,96 +92,3 @@ fn main(args: ~[str]) {
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#debug("%?", args);
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run(args);
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}
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// Treat a whole bunch of ports as one.
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class box<T> {
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let mut contents: option<T>;
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new(+x: T) { self.contents = some(x); }
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fn swap(f: fn(+T) -> T) {
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let mut tmp = none;
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self.contents <-> tmp;
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self.contents = some(f(option::unwrap(tmp)));
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}
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fn unwrap() -> T {
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let mut tmp = none;
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self.contents <-> tmp;
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option::unwrap(tmp)
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}
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}
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class port_set<T: send> {
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let mut ports: ~[pipes::port<T>];
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new() { self.ports = ~[]; }
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fn add(+port: pipes::port<T>) {
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vec::push(self.ports, port)
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}
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fn try_recv() -> option<T> {
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let mut result = none;
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while result == none && self.ports.len() > 0 {
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let i = pipes::wait_many(self.ports.map(|p| p.header()));
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// dereferencing an unsafe pointer nonsense to appease the
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// borrowchecker.
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alt unsafe {(*ptr::addr_of(self.ports[i])).try_recv()} {
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some(m) {
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result = some(move!{m});
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}
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none {
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// Remove this port.
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let mut ports = ~[];
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self.ports <-> ports;
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vec::consume(ports,
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|j, x| if i != j { vec::push(self.ports, x) });
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}
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}
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}
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/*
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while !done {
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do self.ports.swap |ports| {
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if ports.len() > 0 {
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let old_len = ports.len();
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let (_, m, ports) = pipes::select(ports);
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alt m {
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some(pipes::streamp::data(x, next)) {
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result = some(move!{x});
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done = true;
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assert ports.len() == old_len - 1;
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vec::append_one(ports, move!{next})
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}
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none {
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//#error("pipe closed");
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assert ports.len() == old_len - 1;
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ports
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}
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}
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}
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else {
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//#error("no more pipes");
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done = true;
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~[]
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}
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}
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}
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*/
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result
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}
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fn recv() -> T {
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option::unwrap(self.try_recv())
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}
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}
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impl private_methods/&<T: send> for pipes::port<T> {
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pure fn header() -> *pipes::packet_header unchecked {
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alt self.endp {
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some(endp) {
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endp.header()
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}
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none { fail "peeking empty stream" }
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}
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}
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}
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