Reverse the order of the results of pipes::stream

As per #3637.

src/libcore/pipes.rs

@@ -978,10 +978,10 @@ pub enum Port<T:Send> {
 These allow sending or receiving an unlimited number of messages.
 
 */
-pub fn stream<T:Send>() -> (Chan<T>, Port<T>) {
+pub fn stream<T:Send>() -> (Port<T>, Chan<T>) {
     let (c, s) = streamp::init();
 
-    (Chan_({ mut endp: Some(move c) }), Port_({ mut endp: Some(move s) }))
+    (Port_({ mut endp: Some(move s) }), Chan_({ mut endp: Some(move c) }))
 }
 
 impl<T: Send> Chan<T>: GenericChan<T> {
@@ -1070,7 +1070,7 @@ impl<T: Send> PortSet<T> {
     }
 
     fn chan() -> Chan<T> {
-        let (ch, po) = stream();
+        let (po, ch) = stream();
         self.add(move po);
         move ch
     }
@@ -1240,8 +1240,8 @@ pub mod rt {
 pub mod test {
     #[test]
     pub fn test_select2() {
-        let (c1, p1) = pipes::stream();
-        let (c2, p2) = pipes::stream();
+        let (p1, c1) = pipes::stream();
+        let (p2, c2) = pipes::stream();
 
         c1.send(~"abc");
 
@@ -1264,7 +1264,7 @@ pub mod test {
 
     #[test]
     fn test_peek_terminated() {
-        let (chan, port): (Chan<int>, Port<int>) = stream();
+        let (port, chan): (Port<int>, Chan<int>) = stream();
 
         {
             // Destroy the channel

src/libcore/private.rs

@@ -576,7 +576,7 @@ pub mod tests {
 
         for uint::range(0, num_tasks) |_i| {
             let total = total.clone();
-            let (chan, port) = pipes::stream();
+            let (port, chan) = pipes::stream();
             futures.push(move port);
 
             do task::spawn |move total, move chan| {

src/libcore/task/mod.rs

@@ -340,7 +340,7 @@ impl TaskBuilder {
         }
 
         // Construct the future and give it to the caller.
-        let (notify_pipe_ch, notify_pipe_po) = stream::<TaskResult>();
+        let (notify_pipe_po, notify_pipe_ch) = stream::<TaskResult>();
 
         blk(move notify_pipe_po);
 
@@ -1211,7 +1211,7 @@ fn test_unkillable() {
 #[ignore(cfg(windows))]
 #[should_fail]
 fn test_unkillable_nested() {
-    let (ch, po) = pipes::stream();
+    let (po, ch) = pipes::stream();
 
     // We want to do this after failing
     do spawn_unlinked |move ch| {
@@ -1277,7 +1277,7 @@ fn test_child_doesnt_ref_parent() {
 
 #[test]
 fn test_sched_thread_per_core() {
-    let (chan, port) = pipes::stream();
+    let (port, chan) = pipes::stream();
 
     do spawn_sched(ThreadPerCore) |move chan| {
         let cores = rt::rust_num_threads();
@@ -1291,15 +1291,15 @@ fn test_sched_thread_per_core() {
 
 #[test]
 fn test_spawn_thread_on_demand() {
-    let (chan, port) = pipes::stream();
+    let (port, chan) = pipes::stream();
 
     do spawn_sched(ManualThreads(2)) |move chan| {
         let max_threads = rt::rust_sched_threads();
         assert(max_threads as int == 2);
         let running_threads = rt::rust_sched_current_nonlazy_threads();
         assert(running_threads as int == 1);
 
-        let (chan2, port2) = pipes::stream();
+        let (port2, chan2) = pipes::stream();
 
         do spawn() |move chan2| {
             chan2.send(());

src/libcore/task/spawn.rs

@@ -670,7 +670,7 @@ fn test_spawn_raw_unsupervise() {
 #[test]
 #[ignore(cfg(windows))]
 fn test_spawn_raw_notify_success() {
-    let (notify_ch, notify_po) = pipes::stream();
+    let (notify_po, notify_ch) = pipes::stream();
 
     let opts = {
         notify_chan: Some(move notify_ch),
@@ -685,7 +685,7 @@ fn test_spawn_raw_notify_success() {
 #[ignore(cfg(windows))]
 fn test_spawn_raw_notify_failure() {
     // New bindings for these
-    let (notify_ch, notify_po) = pipes::stream();
+    let (notify_po, notify_ch) = pipes::stream();
 
     let opts = {
         linked: false,

src/librustdoc/markdown_writer.rs

@@ -111,12 +111,12 @@ fn pandoc_writer(
         os::close(pipe_err.out);
         os::close(pipe_in.out);
 
-        let (stdout_ch, stdout_po) = pipes::stream();
+        let (stdout_po, stdout_ch) = pipes::stream();
         do task::spawn_sched(task::SingleThreaded) |move stdout_ch| {
             stdout_ch.send(readclose(pipe_out.in));
         }
 
-        let (stderr_ch, stderr_po) = pipes::stream();
+        let (stderr_po, stderr_ch) = pipes::stream();
         do task::spawn_sched(task::SingleThreaded) |move stderr_ch| {
             stderr_ch.send(readclose(pipe_err.in));
         }
@@ -149,7 +149,7 @@ fn readclose(fd: libc::c_int) -> ~str {
 }
 
 fn generic_writer(+process: fn~(+markdown: ~str)) -> Writer {
-    let (setup_ch, setup_po) = pipes::stream();
+    let (setup_po, setup_ch) = pipes::stream();
     do task::spawn |move process, move setup_ch| {
         let po: comm::Port<WriteInstr> = comm::Port();
         let ch = comm::Chan(&po);
@@ -279,7 +279,7 @@ pub fn future_writer_factory(
     let markdown_po = comm::Port();
     let markdown_ch = comm::Chan(&markdown_po);
     let writer_factory = fn~(+page: doc::Page) -> Writer {
-        let (writer_ch, writer_po) = pipes::stream();
+        let (writer_po, writer_ch) = pipes::stream();
         do task::spawn |move writer_ch| {
             let (writer, future) = future_writer();
             writer_ch.send(move writer);
@@ -293,7 +293,7 @@ pub fn future_writer_factory(
 }
 
 fn future_writer() -> (Writer, future::Future<~str>) {
-    let (chan, port) = pipes::stream();
+    let (port, chan) = pipes::stream();
     let writer = fn~(move chan, +instr: WriteInstr) {
         chan.send(copy instr);
     };

src/libstd/arc.rs

@@ -471,7 +471,7 @@ mod tests {
         let v = ~[1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
         let arc_v = arc::ARC(v);
 
-        let (c, p) = pipes::stream();
+        let (p, c) = pipes::stream();
 
         do task::spawn() |move c| {
             let p = pipes::PortSet();
@@ -517,7 +517,7 @@ mod tests {
     fn test_arc_condvar_poison() {
         let arc = ~MutexARC(1);
         let arc2 = ~arc.clone();
-        let (c,p) = pipes::stream();
+        let (p, c) = pipes::stream();
 
         do task::spawn_unlinked |move arc2, move p| {
             let _ = p.recv();
@@ -551,7 +551,7 @@ mod tests {
     fn test_mutex_arc_unwrap_poison() {
         let arc = MutexARC(1);
         let arc2 = ~(&arc).clone();
-        let (c,p) = pipes::stream();
+        let (p, c) = pipes::stream();
         do task::spawn |move c, move arc2| {
             do arc2.access |one| {
                 c.send(());
@@ -649,7 +649,7 @@ mod tests {
     fn test_rw_arc() {
         let arc = ~RWARC(0);
         let arc2 = ~arc.clone();
-        let (c,p) = pipes::stream();
+        let (p,c) = pipes::stream();
 
         do task::spawn |move arc2, move c| {
             do arc2.write |num| {
@@ -695,7 +695,7 @@ mod tests {
         // Reader tasks
         let mut reader_convos = ~[];
         for 10.times {
-            let ((rc1,rp1),(rc2,rp2)) = (pipes::stream(),pipes::stream());
+            let ((rp1,rc1),(rp2,rc2)) = (pipes::stream(),pipes::stream());
             reader_convos.push((move rc1, move rp2));
             let arcn = ~arc.clone();
             do task::spawn |move rp1, move rc2, move arcn| {
@@ -709,7 +709,7 @@ mod tests {
 
         // Writer task
         let arc2 = ~arc.clone();
-        let ((wc1,wp1),(wc2,wp2)) = (pipes::stream(),pipes::stream());
+        let ((wp1,wc1),(wp2,wc2)) = (pipes::stream(),pipes::stream());
         do task::spawn |move arc2, move wc2, move wp1| {
             wp1.recv();
             do arc2.write_cond |state, cond| {

src/libstd/comm.rs

@@ -64,8 +64,8 @@ impl<T: Send, U: Send> DuplexStream<T, U> : Selectable {
 pub fn DuplexStream<T: Send, U: Send>()
     -> (DuplexStream<T, U>, DuplexStream<U, T>)
 {
-    let (c2, p1) = pipes::stream();
-    let (c1, p2) = pipes::stream();
+    let (p1, c2) = pipes::stream();
+    let (p2, c1) = pipes::stream();
     (DuplexStream {
         chan: move c1,
         port: move p1

src/libstd/sync.rs

@@ -34,7 +34,7 @@ struct Waitqueue { head: pipes::Port<SignalEnd>,
                    tail: pipes::Chan<SignalEnd> }
 
 fn new_waitqueue() -> Waitqueue {
-    let (block_tail, block_head) = pipes::stream();
+    let (block_head, block_tail) = pipes::stream();
     Waitqueue { head: move block_head, tail: move block_tail }
 }
 
@@ -733,7 +733,7 @@ mod tests {
     #[test]
     fn test_sem_as_cvar() {
         /* Child waits and parent signals */
-        let (c,p) = pipes::stream();
+        let (p,c) = pipes::stream();
         let s = ~semaphore(0);
         let s2 = ~s.clone();
         do task::spawn |move s2, move c| {
@@ -745,7 +745,7 @@ mod tests {
         let _ = p.recv();
 
         /* Parent waits and child signals */
-        let (c,p) = pipes::stream();
+        let (p,c) = pipes::stream();
         let s = ~semaphore(0);
         let s2 = ~s.clone();
         do task::spawn |move s2, move p| {
@@ -762,8 +762,8 @@ mod tests {
         // time, and shake hands.
         let s = ~semaphore(2);
         let s2 = ~s.clone();
-        let (c1,p1) = pipes::stream();
-        let (c2,p2) = pipes::stream();
+        let (p1,c1) = pipes::stream();
+        let (p2,c2) = pipes::stream();
         do task::spawn |move s2, move c1, move p2| {
             do s2.access {
                 let _ = p2.recv();
@@ -782,7 +782,7 @@ mod tests {
         do task::spawn_sched(task::ManualThreads(1)) {
             let s = ~semaphore(1);
             let s2 = ~s.clone();
-            let (c,p) = pipes::stream();
+            let (p,c) = pipes::stream();
             let child_data = ~mut Some((move s2, move c));
             do s.access {
                 let (s2,c) = option::swap_unwrap(child_data);
@@ -804,7 +804,7 @@ mod tests {
     fn test_mutex_lock() {
         // Unsafely achieve shared state, and do the textbook
         // "load tmp = move ptr; inc tmp; store ptr <- tmp" dance.
-        let (c,p) = pipes::stream();
+        let (p,c) = pipes::stream();
         let m = ~Mutex();
         let m2 = ~m.clone();
         let mut sharedstate = ~0;
@@ -847,7 +847,7 @@ mod tests {
             cond.wait();
         }
         // Parent wakes up child
-        let (chan,port) = pipes::stream();
+        let (port,chan) = pipes::stream();
         let m3 = ~m.clone();
         do task::spawn |move chan, move m3| {
             do m3.lock_cond |cond| {
@@ -870,7 +870,7 @@ mod tests {
 
         for num_waiters.times {
             let mi = ~m.clone();
-            let (chan, port) = pipes::stream();
+            let (port, chan) = pipes::stream();
             ports.push(move port);
             do task::spawn |move chan, move mi| {
                 do mi.lock_cond |cond| {
@@ -932,7 +932,7 @@ mod tests {
         let m2 = ~m.clone();
 
         let result: result::Result<(),()> = do task::try |move m2| {
-            let (c,p) = pipes::stream();
+            let (p,c) = pipes::stream();
             do task::spawn |move p| { // linked
                 let _ = p.recv(); // wait for sibling to get in the mutex
                 task::yield();
@@ -954,12 +954,12 @@ mod tests {
     fn test_mutex_killed_broadcast() {
         let m = ~Mutex();
         let m2 = ~m.clone();
-        let (c,p) = pipes::stream();
+        let (p,c) = pipes::stream();
 
         let result: result::Result<(),()> = do task::try |move c, move m2| {
             let mut sibling_convos = ~[];
             for 2.times {
-                let (c,p) = pipes::stream();
+                let (p,c) = pipes::stream();
                 let c = ~mut Some(move c);
                 sibling_convos.push(move p);
                 let mi = ~m2.clone();
@@ -1022,7 +1022,7 @@ mod tests {
         let result = do task::try {
             let m = ~mutex_with_condvars(2);
             let m2 = ~m.clone();
-            let (c,p) = pipes::stream();
+            let (p,c) = pipes::stream();
             do task::spawn |move m2, move c| {
                 do m2.lock_cond |cond| {
                     c.send(());
@@ -1082,7 +1082,7 @@ mod tests {
                              mode2: RWlockMode) {
         // Test mutual exclusion between readers and writers. Just like the
         // mutex mutual exclusion test, a ways above.
-        let (c,p) = pipes::stream();
+        let (p,c) = pipes::stream();
         let x2 = ~x.clone();
         let mut sharedstate = ~0;
         let ptr = ptr::addr_of(&(*sharedstate));
@@ -1127,8 +1127,8 @@ mod tests {
                              mode2: RWlockMode, make_mode2_go_first: bool) {
         // Much like sem_multi_resource.
         let x2 = ~x.clone();
-        let (c1,p1) = pipes::stream();
-        let (c2,p2) = pipes::stream();
+        let (p1,c1) = pipes::stream();
+        let (p2,c2) = pipes::stream();
         do task::spawn |move c1, move x2, move p2| {
             if !make_mode2_go_first {
                 let _ = p2.recv(); // parent sends to us once it locks, or ...
@@ -1193,7 +1193,7 @@ mod tests {
             cond.wait();
         }
         // Parent wakes up child
-        let (chan,port) = pipes::stream();
+        let (port,chan) = pipes::stream();
         let x3 = ~x.clone();
         do task::spawn |move x3, move chan| {
             do x3.write_cond |cond| {
@@ -1229,7 +1229,7 @@ mod tests {
 
         for num_waiters.times {
             let xi = ~x.clone();
-            let (chan, port) = pipes::stream();
+            let (port, chan) = pipes::stream();
             ports.push(move port);
             do task::spawn |move chan, move xi| {
                 do lock_cond(xi, dg1) |cond| {

src/libstd/task_pool.rs

@@ -42,7 +42,7 @@ pub impl<T> TaskPool<T> {
         assert n_tasks >= 1;
 
         let channels = do vec::from_fn(n_tasks) |i| {
-            let (chan, port) = pipes::stream::<Msg<T>>();
+            let (port, chan) = pipes::stream::<Msg<T>>();
             let init_fn = init_fn_factory();
 
             let task_body: ~fn() = |move port, move init_fn| {

src/test/bench/msgsend-pipes-shared.rs

@@ -55,8 +55,8 @@ fn server(requests: Port<request>, responses: pipes::Chan<uint>) {
 }
 
 fn run(args: &[~str]) {
-    let (to_parent, from_child) = pipes::stream();
-    let (to_child, from_parent) = pipes::stream();
+    let (from_child, to_parent) = pipes::stream();
+    let (from_parent, to_child) = pipes::stream();
 
     let to_child = SharedChan(move to_child);