Class: Mutex

Inherits:
Object show all
Defined in:
opal/stdlib/thread.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Mutex

Returns a new instance of Mutex.



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# File 'opal/stdlib/thread.rb', line 119

def initialize
  # We still keep the @locked state so any logic based on try_lock while
  # held yields reasonable results.
  @locked = false
end

Instance Method Details

#lock ⇒ Object

Raises:



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# File 'opal/stdlib/thread.rb', line 125

def lock
  raise ThreadError, 'Deadlock' if @locked
  @locked = true
  self
end

#locked? ⇒ Boolean

Returns:



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# File 'opal/stdlib/thread.rb', line 131

def locked?
  @locked
end

#owned? ⇒ Boolean

Returns:



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# File 'opal/stdlib/thread.rb', line 135

def owned?
  # Being the only "thread", we implicitly own any locked mutex.
  @locked
end

#synchronize ⇒ Object 



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# File 'opal/stdlib/thread.rb', line 155

def synchronize
  lock
  begin
    yield
  ensure
    unlock
  end
end

#try_lock ⇒ Object 



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# File 'opal/stdlib/thread.rb', line 140

def try_lock
  if locked?
    false
  else
    lock
    true
  end
end

#unlock ⇒ Object

Raises:



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# File 'opal/stdlib/thread.rb', line 149

def unlock
  raise ThreadError, 'Mutex not locked' unless @locked
  @locked = false
  self
end