Class: Libuv::Reactor
- Extended by:
- Accessors, ClassMethods
- Includes:
- Assertions, Resource
- Defined in:
- lib/libuv/reactor.rb
Defined Under Namespace
Modules: ClassMethods
Constant Summary collapse
- CRITICAL =
::Mutex.new
Constants included from Accessors
Constants included from Assertions
Instance Attribute Summary collapse
-
#run_count ⇒ Object
readonly
Returns the value of attribute run_count.
Instance Method Summary collapse
-
#all(*promises) ⇒ ::Libuv::Q::Promise
Combines multiple promises into a single promise that is resolved when all of the input promises are resolved.
-
#any(*promises) ⇒ ::Libuv::Q::Promise
Combines multiple promises into a single promise that is resolved when any of the input promises are resolved.
-
#async(callback = nil, &block) ⇒ ::Libuv::Async
Get a new Async handle.
-
#check(callback = nil, &blk) ⇒ ::Libuv::Check
Get a new Check handle.
-
#defer ⇒ ::Libuv::Q::Deferred
Creates a deferred result object for where the result of an operation may only be returned at some point in the future or is being processed on a different thread (thread safe).
-
#file(path, flags = 0, mode: 0, **opts, &blk) ⇒ ::Libuv::File
Opens a file and returns an object that can be used to manipulate it.
-
#filesystem ⇒ ::Libuv::Filesystem
Returns an object for manipulating the filesystem.
-
#finally(*promises) ⇒ ::Libuv::Q::Promise
Combines multiple promises into a single promise that is resolved when all of the input promises are resolved or rejected.
-
#fs_event(path) ⇒ ::Libuv::FSEvent
Get a new FSEvent instance.
- #handle ⇒ Object
-
#idle(callback = nil, &block) ⇒ ::Libuv::Idle
Get a new Idle handle.
-
#initialize(pointer) ⇒ Reactor
constructor
Initialize a reactor using an FFI::Pointer to a libuv reactor.
-
#inspect ⇒ Object
Overwrite as errors in jRuby can literally hang VM when inspecting as many many classes will reference this class.
-
#log(error, msg = nil, trace = nil) ⇒ Object
Notifies the reactor there was an event that should be logged.
-
#lookup(hostname, hint = :IPv4, port = 9, wait: true, &block) ⇒ ::Libuv::Dns
Lookup a hostname.
-
#lookup_error(err) ⇒ ::Libuv::Error
Lookup an error code and return is as an error object.
-
#next_tick(callback = nil, &block) ⇒ Object
Queue some work to be processed in the next iteration of the event reactor (thread safe).
-
#notifier(callback = nil, &blk) ⇒ ::Libuv::Q::Promise
Provides a promise notifier for receiving un-handled exceptions.
-
#now ⇒ Integer
Get current time in milliseconds.
-
#on_program_interrupt(callback = nil, &block) ⇒ Object
Allows user defined behaviour when sig int is received.
-
#pipe(ipc = false) ⇒ ::Libuv::Pipe
Get a new Pipe instance.
-
#prepare(callback = nil, &blk) ⇒ ::Libuv::Prepare
Get a new Prepare handle.
-
#reactor_running? ⇒ Boolean
(also: #running?)
Tells you whether the Libuv reactor reactor is currently running.
-
#reactor_thread? ⇒ Boolean
True if the calling thread is the same thread as the reactor.
-
#ref ⇒ Object
Prevents the reactor loop from stopping.
-
#reject(reason) ⇒ Object
Creates a promise that is resolved as rejected with the specified reason.
-
#run(run_type = :UV_RUN_DEFAULT) {|promise| ... } ⇒ Object
Run the actual event reactor.
-
#schedule(callback = nil, &block) ⇒ Object
Schedule some work to be processed on the event reactor as soon as possible (thread safe).
-
#signal(signum = nil, callback = nil, &block) ⇒ ::Libuv::Signal
Get a new signal handler.
- #sleep(msecs) ⇒ Object
-
#stop ⇒ Object
Closes handles opened by the reactor class and completes the current reactor iteration (thread safe).
-
#tcp(callback = nil, **opts, &blk) ⇒ ::Libuv::TCP
Get a new TCP instance.
-
#timer(callback = nil, &blk) ⇒ ::Libuv::Timer
Get a new timer instance.
-
#tty(fileno, readable = false) ⇒ ::Libuv::TTY
Get a new TTY instance.
-
#udp(callback = nil, **opts, &blk) ⇒ ::Libuv::UDP
Get a new UDP instance.
-
#unref ⇒ Object
Allows the reactor loop to stop.
-
#update_time ⇒ Object
forces reactor time update, useful for getting more granular times.
-
#work(callback = nil, &block) ⇒ ::Libuv::Work
Queue some work for processing in the libuv thread pool.
Methods included from Accessors
Methods included from ClassMethods
Methods included from Resource
#check_result, #check_result!, #resolve, #to_ptr
Methods included from Assertions
#assert_block, #assert_boolean, #assert_type
Constructor Details
#initialize(pointer) ⇒ Reactor
Initialize a reactor using an FFI::Pointer to a libuv reactor
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# File 'lib/libuv/reactor.rb', line 56 def initialize(pointer) # :notnew: @pointer = pointer @reactor = self @run_count = 0 @ref_count = 0 # Create an async call for scheduling work from other threads @run_queue = Queue.new @process_queue = @reactor.async method(:process_queue_cb) @process_queue.unref # Create a next tick timer @next_tick = @reactor.timer method(:next_tick_cb) @next_tick.unref # Create an async call for ending the reactor @stop_reactor = @reactor.async method(:stop_cb) @stop_reactor.unref # Libuv can prevent the application shutting down once the main thread has ended # The addition of a prepare function prevents this from happening. @reactor_prep = Libuv::Prepare.new(@reactor, method(:noop)) @reactor_prep.unref @reactor_prep.start # LibUV ingnores program interrupt by default. # We provide normal behaviour and allow this to be overriden @on_signal = [] sig_callback = method(:signal_cb) self.signal(:INT, sig_callback).unref self.signal(:HUP, sig_callback).unref self.signal(:TERM, sig_callback).unref # Notify of errors @throw_on_exit = nil @reactor_notify_default = @reactor_notify = proc { |error| @throw_on_exit = error } end |
Instance Attribute Details
#run_count ⇒ Object (readonly)
Returns the value of attribute run_count.
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# File 'lib/libuv/reactor.rb', line 96 def run_count @run_count end |
Instance Method Details
#all(*promises) ⇒ ::Libuv::Q::Promise
Combines multiple promises into a single promise that is resolved when all of the input promises are resolved. (thread safe)
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# File 'lib/libuv/reactor.rb', line 245 def all(*promises) Q.all(@reactor, *promises) end |
#any(*promises) ⇒ ::Libuv::Q::Promise
Combines multiple promises into a single promise that is resolved when any of the input promises are resolved.
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# File 'lib/libuv/reactor.rb', line 255 def any(*promises) Q.any(@reactor, *promises) end |
#async(callback = nil, &block) ⇒ ::Libuv::Async
Get a new Async handle
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# File 'lib/libuv/reactor.rb', line 386 def async(callback = nil, &block) callback ||= block handle = Async.new(@reactor) handle.progress callback if callback handle end |
#check(callback = nil, &blk) ⇒ ::Libuv::Check
Get a new Check handle
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# File 'lib/libuv/reactor.rb', line 371 def check(callback = nil, &blk) Check.new(@reactor, callback || blk) end |
#defer ⇒ ::Libuv::Q::Deferred
Creates a deferred result object for where the result of an operation may only be returned at some point in the future or is being processed on a different thread (thread safe)
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# File 'lib/libuv/reactor.rb', line 233 def defer Q.defer(@reactor) end |
#file(path, flags = 0, mode: 0, **opts, &blk) ⇒ ::Libuv::File
Opens a file and returns an object that can be used to manipulate it
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# File 'lib/libuv/reactor.rb', line 453 def file(path, flags = 0, mode: 0, **opts, &blk) assert_type(String, path, "path must be a String") assert_type(Integer, flags, "flags must be an Integer") assert_type(Integer, mode, "mode must be an Integer") File.new(@reactor, path, flags, mode: mode, **opts, &blk) end |
#filesystem ⇒ ::Libuv::Filesystem
Returns an object for manipulating the filesystem
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# File 'lib/libuv/reactor.rb', line 463 def filesystem Filesystem.new(@reactor) end |
#finally(*promises) ⇒ ::Libuv::Q::Promise
Combines multiple promises into a single promise that is resolved when all of the input promises are resolved or rejected.
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# File 'lib/libuv/reactor.rb', line 266 def finally(*promises) Q.finally(@reactor, *promises) end |
#fs_event(path) ⇒ ::Libuv::FSEvent
Get a new FSEvent instance
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# File 'lib/libuv/reactor.rb', line 442 def fs_event(path) assert_type(String, path) FSEvent.new(@reactor, path) end |
#handle ⇒ Object
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# File 'lib/libuv/reactor.rb', line 155 def handle; @pointer; end |
#idle(callback = nil, &block) ⇒ ::Libuv::Idle
Get a new Idle handle
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# File 'lib/libuv/reactor.rb', line 379 def idle(callback = nil, &block) Idle.new(@reactor, callback || block) end |
#inspect ⇒ Object
Overwrite as errors in jRuby can literally hang VM when inspecting as many many classes will reference this class
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# File 'lib/libuv/reactor.rb', line 150 def inspect "#<#{self.class}:0x#{self.__id__.to_s(16)} NT=#{@run_queue.length}>" end |
#log(error, msg = nil, trace = nil) ⇒ Object
Notifies the reactor there was an event that should be logged
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# File 'lib/libuv/reactor.rb', line 513 def log(error, msg = nil, trace = nil) @reactor_notify.call(error, msg, trace) end |
#lookup(hostname, hint = :IPv4, port = 9, wait: true, &block) ⇒ ::Libuv::Dns
Lookup a hostname
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# File 'lib/libuv/reactor.rb', line 427 def lookup(hostname, hint = :IPv4, port = 9, wait: true, &block) dns = Dns.new(@reactor, hostname, port, hint, wait: wait) # Work is a promise object if block_given? || !wait dns.then block dns else dns.results end end |
#lookup_error(err) ⇒ ::Libuv::Error
Lookup an error code and return is as an error object
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# File 'lib/libuv/reactor.rb', line 296 def lookup_error(err) name = ::Libuv::Ext.err_name(err) if name msg = ::Libuv::Ext.strerror(err) ::Libuv::Error.const_get(name.to_sym).new("#{msg}, #{name}:#{err}") else # We want a back-trace in this case raise "error lookup failed for code #{err}" end rescue Exception => e @reactor.log e, 'performing error lookup' e end |
#next_tick(callback = nil, &block) ⇒ Object
Queue some work to be processed in the next iteration of the event reactor (thread safe)
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# File 'lib/libuv/reactor.rb', line 489 def next_tick(callback = nil, &block) callback ||= block assert_block(callback) @run_queue << callback if reactor_thread? # Create a next tick timer if not @next_tick_scheduled @next_tick.start(0) @next_tick_scheduled = true @next_tick.ref end else @process_queue.call end self end |
#notifier(callback = nil, &blk) ⇒ ::Libuv::Q::Promise
Provides a promise notifier for receiving un-handled exceptions
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# File 'lib/libuv/reactor.rb', line 224 def notifier(callback = nil, &blk) @reactor_notify = callback || blk || @reactor_notify_default self end |
#now ⇒ Integer
Get current time in milliseconds
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# File 'lib/libuv/reactor.rb', line 288 def now ::Libuv::Ext.now(@pointer) end |
#on_program_interrupt(callback = nil, &block) ⇒ Object
Allows user defined behaviour when sig int is received
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# File 'lib/libuv/reactor.rb', line 405 def on_program_interrupt(callback = nil, &block) @on_signal << (callback || block) self end |
#pipe(ipc = false) ⇒ ::Libuv::Pipe
Get a new Pipe instance
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# File 'lib/libuv/reactor.rb', line 349 def pipe(ipc = false) Pipe.new(@reactor, ipc) end |
#prepare(callback = nil, &blk) ⇒ ::Libuv::Prepare
Get a new Prepare handle
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# File 'lib/libuv/reactor.rb', line 364 def prepare(callback = nil, &blk) Prepare.new(@reactor, callback || blk) end |
#reactor_running? ⇒ Boolean Also known as: running?
Tells you whether the Libuv reactor reactor is currently running.
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# File 'lib/libuv/reactor.rb', line 532 def reactor_running? @reactor_running end |
#reactor_thread? ⇒ Boolean
True if the calling thread is the same thread as the reactor.
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# File 'lib/libuv/reactor.rb', line 525 def reactor_thread? self == Thread.current.thread_variable_get(:reactor) end |
#ref ⇒ Object
Prevents the reactor loop from stopping
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# File 'lib/libuv/reactor.rb', line 205 def ref if reactor_thread? && reactor_running? @process_queue.ref if @ref_count == 0 @ref_count += 1 end end |
#reject(reason) ⇒ Object
Creates a promise that is resolved as rejected with the specified reason. This api should be used to forward rejection in a chain of promises. If you are dealing with the last promise in a promise chain, you don’t need to worry about it.
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# File 'lib/libuv/reactor.rb', line 273 def reject(reason) Q.reject(@reactor, reason) end |
#run(run_type = :UV_RUN_DEFAULT) {|promise| ... } ⇒ Object
Run the actual event reactor. This method will block until the reactor is stopped.
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# File 'lib/libuv/reactor.rb', line 162 def run(run_type = :UV_RUN_DEFAULT) if not @reactor_running begin @reactor_running = true raise 'only one reactor allowed per-thread' if Thread.current.thread_variable_get(:reactor) Thread.current.thread_variable_set(:reactor, @reactor) @throw_on_exit = nil if block_given? update_time ::Fiber.new { begin yield @reactor rescue Exception => e log(e, 'in reactor run block') end }.resume end @run_count += 1 ::Libuv::Ext.run(@pointer, run_type) # This is blocking ensure Thread.current.thread_variable_set(:reactor, nil) @reactor_running = false @run_queue.clear end # Raise the last unhandled error to occur on the reactor thread raise @throw_on_exit if @throw_on_exit elsif block_given? if reactor_thread? update_time yield @reactor else raise 'reactor already running on another thread' end end @reactor end |
#schedule(callback = nil, &block) ⇒ Object
Schedule some work to be processed on the event reactor as soon as possible (thread safe)
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# File 'lib/libuv/reactor.rb', line 471 def schedule(callback = nil, &block) callback ||= block assert_block(callback) if reactor_thread? callback.call else @run_queue << callback @process_queue.call end self end |
#signal(signum = nil, callback = nil, &block) ⇒ ::Libuv::Signal
Get a new signal handler
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# File 'lib/libuv/reactor.rb', line 396 def signal(signum = nil, callback = nil, &block) callback ||= block handle = Signal.new(@reactor) handle.progress callback if callback handle.start(signum) if signum handle end |
#sleep(msecs) ⇒ Object
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# File 'lib/libuv/reactor.rb', line 311 def sleep(msecs) fiber = Fiber.current time = timer { time.close fiber.resume }.start(msecs) Fiber.yield end |
#stop ⇒ Object
Closes handles opened by the reactor class and completes the current reactor iteration (thread safe)
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# File 'lib/libuv/reactor.rb', line 518 def stop @stop_reactor.call end |
#tcp(callback = nil, **opts, &blk) ⇒ ::Libuv::TCP
Get a new TCP instance
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# File 'lib/libuv/reactor.rb', line 323 def tcp(callback = nil, **opts, &blk) TCP.new(@reactor, progress: callback || blk, **opts) end |
#timer(callback = nil, &blk) ⇒ ::Libuv::Timer
Get a new timer instance
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# File 'lib/libuv/reactor.rb', line 357 def timer(callback = nil, &blk) Timer.new(@reactor, callback || blk) end |
#tty(fileno, readable = false) ⇒ ::Libuv::TTY
Get a new TTY instance
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# File 'lib/libuv/reactor.rb', line 339 def tty(fileno, readable = false) assert_type(Integer, fileno, "io#fileno must return an integer file descriptor, #{fileno.inspect} given") TTY.new(@reactor, fileno, readable) end |
#udp(callback = nil, **opts, &blk) ⇒ ::Libuv::UDP
Get a new UDP instance
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# File 'lib/libuv/reactor.rb', line 330 def udp(callback = nil, **opts, &blk) UDP.new(@reactor, progress: callback || blk, **opts) end |
#unref ⇒ Object
Allows the reactor loop to stop
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# File 'lib/libuv/reactor.rb', line 213 def unref if reactor_thread? && reactor_running? && @ref_count > 0 @ref_count -= 1 @process_queue.unref if @ref_count == 0 end end |
#update_time ⇒ Object
forces reactor time update, useful for getting more granular times
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# File 'lib/libuv/reactor.rb', line 280 def update_time ::Libuv::Ext.update_time(@pointer) self end |
#work(callback = nil, &block) ⇒ ::Libuv::Work
Queue some work for processing in the libuv thread pool
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# File 'lib/libuv/reactor.rb', line 415 def work(callback = nil, &block) callback ||= block assert_block(callback) Work.new(@reactor, callback) # Work is a promise object end |