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Diffstat (limited to 'src/ruby/lib/grpc/notifier.rb')
-rw-r--r-- | src/ruby/lib/grpc/notifier.rb | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/src/ruby/lib/grpc/notifier.rb b/src/ruby/lib/grpc/notifier.rb new file mode 100644 index 0000000000..caa18bbed6 --- /dev/null +++ b/src/ruby/lib/grpc/notifier.rb @@ -0,0 +1,60 @@ +# Copyright 2015, Google Inc. +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are +# met: +# +# * Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# * Redistributions in binary form must reproduce the above +# copyright notice, this list of conditions and the following disclaimer +# in the documentation and/or other materials provided with the +# distribution. +# * Neither the name of Google Inc. nor the names of its +# contributors may be used to endorse or promote products derived from +# this software without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +# 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 |