Class: Hakuban::ObjectObserveContract

Inherits:
Contract show all
Includes:
Stream
Defined in:
lib/hakuban/contract.rb

Instance Attribute Summary

Attributes inherited from Contract

#descriptor

Instance Method Summary collapse

Methods included from Stream

#each

Methods inherited from Contract

#inspect

Methods inherited from FFIObject

#do_and_drop, #do_and_drop_or_return, #drop, #drop_lock, #drop_release, #dropped?, generate_finalizer, #initialize_copy, #inspect, #with_pointer, with_pointers

Constructor Details

#initialize(local_exchange, descriptor) ⇒ ObjectObserveContract

Returns a new instance of ObjectObserveContract.



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# File 'lib/hakuban/contract.rb', line 22

def initialize(local_exchange, descriptor)
	@local_exchange, @descriptor = local_exchange, descriptor
	@local_exchange.with_pointer { |local_exchange_pointer|
		@descriptor.with_pointer { |descriptor_pointer|
			initialize_pointer(FFI::hakuban_object_observe_contract_new(local_exchange_pointer, descriptor_pointer),:hakuban_object_observe_contract_drop,nil)
		}
	}
end

Instance Method Details

#next(&block) ⇒ Object 



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# File 'lib/hakuban/contract.rb', line 35

def next(&block)
	return nil if ! pointer = FFI::FFIFutureReturningPointer.create_and_await(self) { |pointer| FFI::hakuban_object_observe_contract_next(pointer) }.unwrap
	ObjectStateStream.send(:new, pointer).do_and_drop_or_return(&block)
rescue FFIObject::PointerAlreadyDropped
end

#ready(&block) ⇒ Object 



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# File 'lib/hakuban/contract.rb', line 41

def ready(&block)
	return nil  if ! pointer = with_pointer { |pointer| FFI::hakuban_object_observe_contract_ready(pointer) }.unwrap
	ObjectStateStream.send(:new, pointer).do_and_drop_or_return(&block)
rescue FFIObject::PointerAlreadyDropped
end

#terminate ⇒ Object 



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# File 'lib/hakuban/contract.rb', line 47

def terminate
	with_pointer { |pointer| FFI::hakuban_object_observe_contract_terminate(pointer) }
rescue FFIObject::PointerAlreadyDropped
end