Commits on Feb 17, 2015

1. Revise std::thread semantics …

   This commit makes several changes to `std::thread` in preparation for
   final stabilization:
   
   * It removes the ability to handle panics from `scoped` children; see
     rust-lang#20807 for discussion
   
   * It adds a `JoinHandle` structure, now returned from `spawn`, which
     makes it possible to join on children that do not share data from
     their parent's stack. The child is automatically detached when the
     handle is dropped, and the handle cannot be copied due to Posix
     semantics.
   
   * It moves all static methods from `std::thread::Thread` to free
     functions in `std::thread`. This was done in part because, due to the
     above changes, there are effectively no direct `Thread` constructors,
     and the static methods have tended to feel a bit awkward.
   
   * Adds an `io::Result` around the `Builder` methods `scoped` and
     `spawn`, making it possible to handle OS errors when creating
     threads. The convenience free functions entail an unwrap.
   
   * Stabilizes the entire module. Despite the fact that the API is
     changing somewhat here, this is part of a long period of baking and
     the changes are addressing all known issues prior to alpha2. If
     absolutely necessary, further breaking changes can be made prior to beta.
   
   Closes rust-lang#20807
   
   [breaking-change]

   

   aturon committed Feb 17, 2015
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2. Fallout from stabilization

   

   aturon committed Feb 17, 2015
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