module Concurrent
module Concurrent::Dereferenceable
module Concurrent::JavaAtomicFixnum
module Concurrent::MutexAtomicFixnum
module Concurrent::Obligation
module Concurrent::Postable
module Concurrent::Runnable
module Concurrent::Stoppable
module Concurrent::ThreadLocalJavaStorage
module Concurrent::ThreadLocalNewStorage
module Concurrent::ThreadLocalOldStorage
module Concurrent::ThreadLocalSymbolAllocator
module Concurrent::UsesGlobalThreadPool
class Concurrent::Actor
class Concurrent::Actor::Poolbox
class Concurrent::Agent
class Concurrent::AtomicFixnum
class Concurrent::CachedThreadPool
class Concurrent::CachedThreadPool::Worker
class Concurrent::Channel
class Concurrent::Condition
class Concurrent::Condition::Result
class Concurrent::CopyOnNotifyObserverSet
class Concurrent::CopyOnWriteObserverSet
class Concurrent::CountDownLatch
class Concurrent::DependencyCounter
class Concurrent::Event
class Concurrent::FixedThreadPool
class Concurrent::FixedThreadPool::Worker
class Concurrent::Future
class Concurrent::IVar
class Concurrent::ImmediateExecutor
class Concurrent::MVar
class Concurrent::NullThreadPool
class Concurrent::Promise
class Concurrent::Runnable::Context
class Concurrent::SafeTaskExecutor
class Concurrent::ScheduledTask
class Concurrent::Supervisor
class Concurrent::ThreadLocalVar
class Concurrent::TimerTask
concurrent-ruby
0.5.0.pre.1
# count_observers
(Integer)
def count_observers observers.count end