| # Copyright 2015, Google Inc. |
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| # |
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| # |
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| # in the documentation and/or other materials provided with the |
| # distribution. |
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| # |
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| |
| # GRPC contains the General RPC module. |
| module GRPC |
| # Notifier is useful high-level synchronization primitive. |
| class Notifier |
| attr_reader :payload, :notified |
| alias_method :notified?, :notified |
| |
| def initialize |
| @mutex = Mutex.new |
| @cvar = ConditionVariable.new |
| @notified = false |
| @payload = nil |
| end |
| |
| def wait |
| @mutex.synchronize do |
| @cvar.wait(@mutex) until notified? |
| end |
| end |
| |
| def notify(payload) |
| @mutex.synchronize do |
| return Error.new('already notified') if notified? |
| @payload = payload |
| @notified = true |
| @cvar.signal |
| return nil |
| end |
| end |
| end |
| end |