Remove thread variables backport

They are already present on Ruby 2.2

1 files changed, 0 insertions, 86 deletions

diff --git a/activesupport/lib/active_support/core_ext/thread.rb b/activesupport/lib/active_support/core_ext/thread.rb
deleted file mode 100644
index 9637178f53..0000000000
--- a/activesupport/lib/active_support/core_ext/thread.rb
+++ /dev/null
@@ -1,86 +0,0 @@
-class Thread
-  LOCK = Mutex.new # :nodoc:
-
-  # Returns the value of a thread local variable that has been set. Note that
-  # these are different than fiber local values.
-  #
-  # Thread local values are carried along with threads, and do not respect
-  # fibers. For example:
-  #
-  #   Thread.new {
-  #     Thread.current.thread_variable_set("foo", "bar") # set a thread local
-  #     Thread.current["foo"] = "bar"                    # set a fiber local
-  #
-  #     Fiber.new {
-  #       Fiber.yield [
-  #         Thread.current.thread_variable_get("foo"), # get the thread local
-  #         Thread.current["foo"],                     # get the fiber local
-  #       ]
-  #     }.resume
-  #   }.join.value # => ['bar', nil]
-  #
-  # The value <tt>"bar"</tt> is returned for the thread local, where +nil+ is returned
-  # for the fiber local. The fiber is executed in the same thread, so the
-  # thread local values are available.
-  def thread_variable_get(key)
-    _locals[key.to_sym]
-  end
-
-  # Sets a thread local with +key+ to +value+. Note that these are local to
-  # threads, and not to fibers. Please see Thread#thread_variable_get for
-  # more information.
-  def thread_variable_set(key, value)
-    _locals[key.to_sym] = value
-  end
-
-  # Returns an array of the names of the thread-local variables (as Symbols).
-  #
-  #    thr = Thread.new do
-  #      Thread.current.thread_variable_set(:cat, 'meow')
-  #      Thread.current.thread_variable_set("dog", 'woof')
-  #    end
-  #    thr.join               # => #<Thread:0x401b3f10 dead>
-  #    thr.thread_variables   # => [:dog, :cat]
-  #
-  # Note that these are not fiber local variables. Please see Thread#thread_variable_get
-  # for more details.
-  def thread_variables
-    _locals.keys
-  end
-
-  # Returns <tt>true</tt> if the given string (or symbol) exists as a
-  # thread-local variable.
-  #
-  #    me = Thread.current
-  #    me.thread_variable_set(:oliver, "a")
-  #    me.thread_variable?(:oliver)    # => true
-  #    me.thread_variable?(:stanley)   # => false
-  #
-  # Note that these are not fiber local variables. Please see Thread#thread_variable_get
-  # for more details.
-  def thread_variable?(key)
-    _locals.has_key?(key.to_sym)
-  end
-
-  # Freezes the thread so that thread local variables cannot be set via
-  # Thread#thread_variable_set, nor can fiber local variables be set.
-  #
-  #   me = Thread.current
-  #   me.freeze
-  #   me.thread_variable_set(:oliver, "a")  # => RuntimeError: can't modify frozen thread locals
-  #   me[:oliver] = "a"                     # => RuntimeError: can't modify frozen thread locals
-  def freeze
-    _locals.freeze
-    super
-  end
-
-  private
-
-  def _locals
-    if defined?(@_locals)
-      @_locals
-    else
-      LOCK.synchronize { @_locals ||= {} }
-    end
-  end
-end unless Thread.instance_methods.include?(:thread_variable_set)