From 5d2b8d43729f3c616f0af0125f05e2cab9d0aae4 Mon Sep 17 00:00:00 2001
From: Brian Anderson <banderson@mozilla.com>
Date: Mon, 29 Jul 2013 12:00:55 -0700
Subject: [PATCH] std: Remove PlatformThread spawn mode. Obsolete

---
 src/libstd/task/mod.rs               | 18 ------------
 src/libstd/task/spawn.rs             |  6 ++--
 src/test/run-pass/platform_thread.rs | 44 ----------------------------
 3 files changed, 2 insertions(+), 66 deletions(-)
 delete mode 100644 src/test/run-pass/platform_thread.rs

diff --git a/src/libstd/task/mod.rs b/src/libstd/task/mod.rs
index 503085b412b6..c14926ba5a4d 100644
--- a/src/libstd/task/mod.rs
+++ b/src/libstd/task/mod.rs
@@ -96,13 +96,6 @@ pub enum SchedMode {
     CurrentScheduler,
     /// Run task on a specific scheduler
     ExistingScheduler(Scheduler),
-    /**
-     * Tasks are scheduled on the main OS thread
-     *
-     * The main OS thread is the thread used to launch the runtime which,
-     * in most cases, is the process's initial thread as created by the OS.
-     */
-    PlatformThread,
     /// All tasks run in the same OS thread
     SingleThreaded,
 }
@@ -1094,17 +1087,6 @@ fn test_avoid_copying_the_body_unlinked() {
     }
 }
 
-#[test]
-fn test_platform_thread() {
-    let (po, ch) = stream();
-    let mut builder = task();
-    builder.sched_mode(PlatformThread);
-    do builder.spawn {
-        ch.send(());
-    }
-    po.recv();
-}
-
 #[test]
 #[ignore(cfg(windows))]
 #[should_fail]
diff --git a/src/libstd/task/spawn.rs b/src/libstd/task/spawn.rs
index 020d9487a178..1e4d781c5d24 100644
--- a/src/libstd/task/spawn.rs
+++ b/src/libstd/task/spawn.rs
@@ -84,7 +84,7 @@ use local_data;
 use task::local_data_priv::{local_get, local_set, OldHandle};
 use task::rt::rust_task;
 use task::rt;
-use task::{Failure, PlatformThread, SchedOpts, SingleThreaded};
+use task::{Failure, SchedOpts, SingleThreaded};
 use task::{Success, TaskOpts, TaskResult};
 use task::{ExistingScheduler, SchedulerHandle};
 use task::unkillable;
@@ -808,8 +808,7 @@ fn spawn_raw_oldsched(mut opts: TaskOpts, f: ~fn()) {
         let num_threads = match opts.mode {
             DefaultScheduler
             | CurrentScheduler
-            | ExistingScheduler(*)
-            | PlatformThread => 0u, /* Won't be used */
+            | ExistingScheduler(*) => 0u, /* Won't be used */
             SingleThreaded => 1u,
         };
 
@@ -817,7 +816,6 @@ fn spawn_raw_oldsched(mut opts: TaskOpts, f: ~fn()) {
             let sched_id = match opts.mode {
                 CurrentScheduler => rt::rust_get_sched_id(),
                 ExistingScheduler(SchedulerHandle(id)) => id,
-                PlatformThread => rt::rust_osmain_sched_id(),
                 _ => rt::rust_new_sched(num_threads)
             };
             rt::rust_new_task_in_sched(sched_id)
diff --git a/src/test/run-pass/platform_thread.rs b/src/test/run-pass/platform_thread.rs
deleted file mode 100644
index 8569cd30cf51..000000000000
--- a/src/test/run-pass/platform_thread.rs
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright 2012 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.
-
-// Jump back and forth between the OS main thread and a new scheduler.
-// The OS main scheduler should continue to be available and not terminate
-// while it is not in use.
-
-use std::task;
-
-pub fn main() {
-    run(100);
-}
-
-fn run(i: int) {
-
-    info!(i);
-
-    if i == 0 {
-        return;
-    }
-
-    let mut builder = task::task();
-    builder.sched_mode(task::PlatformThread);
-    builder.unlinked();
-    do builder.spawn {
-        task::yield();
-        let mut builder = task::task();
-        builder.sched_mode(task::SingleThreaded);
-        builder.unlinked();
-        do builder.spawn {
-            task::yield();
-            run(i - 1);
-            task::yield();
-        }
-        task::yield();
-    }
-}