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U:RDoc::NormalClass[iI"
Fiber:ET@I" Object;To:RDoc::Markup::Document: @parts[o;;[$o: RDoc::Markup::Paragraph;[
I"EFibers are primitives for implementing light weight cooperative ;TI"Mconcurrency in Ruby. Basically they are a means of creating code blocks ;TI"Lthat can be paused and resumed, much like threads. The main difference ;TI"Nis that they are never preempted and that the scheduling must be done by ;TI"#the programmer and not the VM.;To: RDoc::Markup::BlankLine o; ;[ I"OAs opposed to other stackless light weight concurrency models, each fiber ;TI"Jcomes with a stack. This enables the fiber to be paused from deeply ;TI"Dnested function calls within the fiber block. See the ruby(1) ;TI"9manpage to configure the size of the fiber stack(s).;T@o; ;[
I"KWhen a fiber is created it will not run automatically. Rather it must ;TI"?be explicitly asked to run using the Fiber#resume method. ;TI"FThe code running inside the fiber can give up control by calling ;TI"EFiber.yield in which case it yields control back to caller (the ;TI"!caller of the Fiber#resume).;T@o; ;[I"JUpon yielding or termination the Fiber returns the value of the last ;TI"executed expression;T@o; ;[I"For instance:;T@o:RDoc::Markup::Verbatim;[
I"fiber = Fiber.new do
;TI" Fiber.yield 1
;TI" 2
;TI" end
;TI"
;TI"puts fiber.resume
;TI"puts fiber.resume
;TI"puts fiber.resume
;T: @format0o; ;[I"produces;T@o; ;[I"1
;TI"2
;TI"#FiberError: dead fiber called
;T; 0o; ;[ I"HThe Fiber#resume method accepts an arbitrary number of parameters, ;TI"Dif it is the first call to #resume then they will be passed as ;TI"Eblock arguments. Otherwise they will be the return value of the ;TI"call to Fiber.yield;T@o; ;[I"
Example:;T@o; ;[ I""fiber = Fiber.new do |first|
;TI"& second = Fiber.yield first + 2
;TI" end
;TI"
;TI"puts fiber.resume 10
;TI"!puts fiber.resume 1_000_000
;TI"Kputs fiber.resume "The fiber will be dead before I can cause trouble"
;T; 0o; ;[I"produces;T@o; ;[I"12
;TI"
1000000
;TI"#FiberError: dead fiber called
;T; 0S:RDoc::Markup::Heading:
leveli: textI"Non-blocking Fibers;T@o; ;[
I"LThe concept of non-blocking fiber was introduced in Ruby 3.0. ;TI"OA non-blocking fiber, when reaching a operation that would normally block ;TI"Mthe fiber (like sleep, or wait for another process or I/O) ;TI"Lwill yield control to other fibers and allow the scheduler to ;TI"Mhandle blocking and waking up (resuming) this fiber when it can proceed.;T@o; ;[ I"TFor a Fiber to behave as non-blocking, it need to be created in Fiber.new with ;TI"Jblocking: false (which is the default), and Fiber.scheduler ;TI"Nshould be set with Fiber.set_scheduler. If Fiber.scheduler is not set in ;TI"Qthe current thread, blocking and non-blocking fibers' behavior is identical.;T@o; ;[I"QRuby doesn't provide a scheduler class: it is expected to be implemented by ;TI"1the user and correspond to Fiber::Scheduler.;T@o; ;[I"SThere is also Fiber.schedule method, which is expected to immediately perform ;TI"Rthe given block in a non-blocking manner. Its actual implementation is up to ;TI"the scheduler.;T:
@fileI" cont.c;T:0@omit_headings_from_table_of_contents_below0;0;0[ [ [ [[I"
class;T[[: public[[I"[];TI" cont.c;T[I"[]=;T@y[I"
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raise;T@y[I" resume;T@y[I" storage;T@y[I"
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transfer;T@y[;[ [;[ [ [U:RDoc::Context::Section[i 0o;;[ ;0;0[@m@mcRDoc::TopLevel