class SynchronizedDelegator

This class provides a trivial way to synchronize all calls to a given object by wrapping it with a ‘Delegator` that performs `Monitor#enter/exit` calls around the delegated `#send`. Example:

array = [] # not thread-safe on many impls
array = SynchronizedDelegator.new([]) # thread-safe

A simple ‘Monitor` provides a very coarse-grained way to synchronize a given object, in that it will cause synchronization for methods that have no need for it, but this is a trivial way to get thread-safety where none may exist currently on some implementations.

This class is currently being considered for inclusion into stdlib, via bugs.ruby-lang.org/issues/8556

Public Class Methods

new(obj) click to toggle source

# File lib/thread_safe/synchronized_delegator.rb, line 28
def initialize(obj)
  __setobj__(obj)
  @monitor = Monitor.new
end

Public Instance Methods

method_missing(method, *args, &block) click to toggle source

Calls superclass method

# File lib/thread_safe/synchronized_delegator.rb, line 33
def method_missing(method, *args, &block)
  monitor = @monitor
  begin
    monitor.enter
    super
  ensure
    monitor.exit
  end
end

setup() click to toggle source

# File lib/thread_safe/synchronized_delegator.rb, line 19
def setup
  @old_abort = Thread.abort_on_exception
  Thread.abort_on_exception = true
end

teardown() click to toggle source

# File lib/thread_safe/synchronized_delegator.rb, line 24
def teardown
  Thread.abort_on_exception = @old_abort
end