class RSpec::Support::ReentrantMutex

Allows a thread to lock out other threads from a critical section of code, while allowing the thread with the lock to reenter that section.

Based on Monitor as of 2.2 - github.com/ruby/ruby/blob/eb7ddaa3a47bf48045d26c72eb0f263a53524ebc/lib/monitor.rb#L9

Depends on Mutex, but Mutex is only available as part of core since 1.9.1:

exists - http://ruby-doc.org/core-1.9.1/Mutex.html
dne    - http://ruby-doc.org/core-1.9.0/Mutex.html

@private

Public Class Methods

new() click to toggle source
# File lib/rspec/support/reentrant_mutex.rb, line 15
def initialize
  @owner = nil
  @count = 0
  @mutex = Mutex.new
end

Public Instance Methods

synchronize() { || ... } click to toggle source
# File lib/rspec/support/reentrant_mutex.rb, line 21
def synchronize
  enter
  yield
ensure
  exit
end

Private Instance Methods

enter() click to toggle source
# File lib/rspec/support/reentrant_mutex.rb, line 30
def enter
  @mutex.lock if @owner != Thread.current
  @owner = Thread.current
  @count += 1
end
exit() click to toggle source
# File lib/rspec/support/reentrant_mutex.rb, line 36
def exit
  @count -= 1
  return unless @count == 0
  @owner = nil
  @mutex.unlock
end