Class: WaterDrop::Helpers::Counter

Inherits:
Object
  • Object
show all
Defined in:
lib/waterdrop/helpers/counter.rb

Overview

Atomic counter that we can safely increment and decrement without race conditions

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Counter

Returns a new instance of Counter.



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# File 'lib/waterdrop/helpers/counter.rb', line 11

def initialize
  @value = 0
  @mutex = Mutex.new
end

Instance Attribute Details

#value ⇒ Integer (readonly)

Returns current value.

Returns:

  • (Integer) —

    current value



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# File 'lib/waterdrop/helpers/counter.rb', line 9

def value
  @value
end

Instance Method Details

#decrement ⇒ Object

Decrements the value by 1



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# File 'lib/waterdrop/helpers/counter.rb', line 22

def decrement
  @mutex.synchronize { @value -= 1 }
end

#increment ⇒ Object

Increments the value by 1



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# File 'lib/waterdrop/helpers/counter.rb', line 17

def increment
  @mutex.synchronize { @value += 1 }
end