spin_yield_lock.hpp

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#pragma once
 
namespace fc {
  class microseconds;
  class time_point;
 
  class spin_yield_lock {
    public:
      spin_yield_lock();
      bool try_lock();
      bool try_lock_for( const microseconds& rel_time );
      bool try_lock_until( const time_point& abs_time );
      void lock(); 
      void unlock(); 
      
    private:
      enum lock_store {locked,unlocked};
      int _lock;
  };
 
} // namespace fc