Use monitor to lock : Synchronization « Threads « Ruby

1. Ruby
2. Threads
3. Synchronization

Use monitor to lock

require 'monitor' 
class Counter 
    attr_reader :count 

    def initialize 
        @count = 0 
    end 

    def tick 
        @count += 1 
    end 
end 


c = Counter.new 
lock = Monitor.new 


t1 = Thread.new { 10000.times { lock.synchronize { c.tick } } } 
t2 = Thread.new { 10000.times { lock.synchronize { c.tick } } } 
t1.join; t2.join 


c.count # 20000 

 

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