struct
   Crystal::EventLoop::Polling::Waiters
   
  
  Overview
A FIFO queue of Event waiting on the same operation (either read or write)
for a fd. See PollDescriptor.
Race conditions on the state of the waiting list are handled through the ready always ready variables.
Thread unsafe: parallel mutations must be protected with a lock.
Defined in:
crystal/event_loop/polling/waiters.crConstructors
Instance Method Summary
- 
        #add(event : Pointer(Event)) : Bool
        
          Adds an event to the waiting list. 
- #delete(event : Pointer(Event)) : Nil
- #initialize
- 
        #ready_all(& : Pointer(Event) -> ) : Nil
        
          Dequeues all pending events and marks the list as always ready. 
- 
        #ready_one(& : Pointer(Event) -> Bool) : Nil
        
          Removes one pending event or marks the list as ready when there are no pending events (we got notified of readiness before a thread enqueued). 
Instance methods inherited from struct Struct
  
  
    
      ==(other) : Bool
    ==, 
    
  
    
      hash(hasher)
    hash, 
    
  
    
      inspect(io : IO) : Nil
    inspect, 
    
  
    
      pretty_print(pp) : Nil
    pretty_print, 
    
  
    
      to_s(io : IO) : Nil
    to_s
    
  
      
      
  Class methods inherited from struct Struct
  
  
    
      pre_initialize(address : Pointer) : Nil
    pre_initialize
    
  
      
    
      
  Instance methods inherited from struct Value
  
  
    
      ==(other : JSON::Any)==(other : YAML::Any)
==(other) ==, dup dup
Instance methods inherited from class Object
  
  
    
      ! : Bool
    !, 
    
  
    
      !=(other)
    !=, 
    
  
    
      !~(other)
    !~, 
    
  
    
      ==(other)
    ==, 
    
  
    
      ===(other : JSON::Any)===(other : YAML::Any)
===(other) ===, =~(other) =~, as(type : Class) as, as?(type : Class) as?, class class, dup dup, hash(hasher)
hash hash, in?(collection : Object) : Bool
in?(*values : Object) : Bool in?, inspect(io : IO) : Nil
inspect : String inspect, is_a?(type : Class) : Bool is_a?, itself itself, nil? : Bool nil?, not_nil!(message)
not_nil! not_nil!, pretty_inspect(width = 79, newline = "\n", indent = 0) : String pretty_inspect, pretty_print(pp : PrettyPrint) : Nil pretty_print, responds_to?(name : Symbol) : Bool responds_to?, tap(&) tap, to_json(io : IO) : Nil
to_json : String to_json, to_pretty_json(indent : String = " ") : String
to_pretty_json(io : IO, indent : String = " ") : Nil to_pretty_json, to_s(io : IO) : Nil
to_s : String to_s, to_yaml(io : IO) : Nil
to_yaml : String to_yaml, try(&) try, unsafe_as(type : T.class) forall T unsafe_as
Class methods inherited from class Object
  
  
    
      from_json(string_or_io, root : String)from_json(string_or_io) from_json, from_yaml(string_or_io : String | IO) from_yaml
Macros inherited from class Object
  
  
    
      class_getter(*names, &block)
    class_getter, 
    
  
    
      class_getter!(*names)
    class_getter!, 
    
  
    
      class_getter?(*names, &block)
    class_getter?, 
    
  
    
      class_property(*names, &block)
    class_property, 
    
  
    
      class_property!(*names)
    class_property!, 
    
  
    
      class_property?(*names, &block)
    class_property?, 
    
  
    
      class_setter(*names)
    class_setter, 
    
  
    
      def_clone
    def_clone, 
    
  
    
      def_equals(*fields)
    def_equals, 
    
  
    
      def_equals_and_hash(*fields)
    def_equals_and_hash, 
    
  
    
      def_hash(*fields)
    def_hash, 
    
  
    
      delegate(*methods, to object)
    delegate, 
    
  
    
      forward_missing_to(delegate)
    forward_missing_to, 
    
  
    
      getter(*names, &block)
    getter, 
    
  
    
      getter!(*names)
    getter!, 
    
  
    
      getter?(*names, &block)
    getter?, 
    
  
    
      property(*names, &block)
    property, 
    
  
    
      property!(*names)
    property!, 
    
  
    
      property?(*names, &block)
    property?, 
    
  
    
      setter(*names)
    setter
    
  
    
  Constructor Detail
Instance Method Detail
Adds an event to the waiting list. May return false immediately if another thread marked the list as ready in parallel, returns true otherwise.
Dequeues all pending events and marks the list as always ready. This must be called when a fd is closed or an error or hup event occurred.