diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,10 @@
 # ChangeLog for time-manager
 
+## 0.2.4
+
+* Providing `isAllGone`.
+* Providing emptyHandle.
+
 ## 0.2.3
 
 * Exporting defaultManager.
diff --git a/System/ThreadManager.hs b/System/ThreadManager.hs
--- a/System/ThreadManager.hs
+++ b/System/ThreadManager.hs
@@ -8,7 +8,7 @@
     ThreadManager,
     newThreadManager,
     stopAfter,
-    KilledByThreadManager(..),
+    KilledByThreadManager (..),
 
     -- * Fork
     forkManaged,
@@ -19,6 +19,7 @@
 
     -- * Synchronization
     waitUntilAllGone,
+    isAllGone,
 
     -- * Re-exports
     T.Manager,
@@ -187,6 +188,11 @@
 waitUntilAllGone (ThreadManager _timmgr var) = atomically $ do
     m <- readTVar var
     check (Map.size m == 0)
+
+isAllGone :: ThreadManager -> STM Bool
+isAllGone (ThreadManager _timmgr var) = do
+    m <- readTVar var
+    return (Map.size m == 0)
 
 ----------------------------------------------------------------
 
diff --git a/System/TimeManager.hs b/System/TimeManager.hs
--- a/System/TimeManager.hs
+++ b/System/TimeManager.hs
@@ -8,6 +8,7 @@
     defaultManager,
     TimeoutAction,
     Handle,
+    emptyHandle,
 
     -- ** Manager
     initialize,
@@ -63,9 +64,11 @@
     , handleStateRef :: IORef State
     }
 
+{-# NOINLINE emptyAction #-}
 emptyAction :: IORef TimeoutAction
 emptyAction = unsafePerformIO $ I.newIORef (return ())
 
+{-# NOINLINE emptyState #-}
 emptyState :: IORef State
 emptyState = unsafePerformIO $ I.newIORef Inactive
 
@@ -84,7 +87,7 @@
 
 ----------------------------------------------------------------
 
--- | Creating timeout manager which works every N micro seconds
+-- | Creating timeout manager which works every N microseconds
 --   where N is the first argument.
 initialize :: Int -> IO Manager
 initialize timeout
diff --git a/time-manager.cabal b/time-manager.cabal
--- a/time-manager.cabal
+++ b/time-manager.cabal
@@ -1,5 +1,5 @@
 Name:                time-manager
-Version:             0.2.3
+Version:             0.2.4
 Synopsis:            Scalable timer
 License:             MIT
 License-file:        LICENSE