diff --git a/Include/Aurora/Async/IThreadPool.hpp b/Include/Aurora/Async/IThreadPool.hpp
index be2d1f30..ac6552de 100644
--- a/Include/Aurora/Async/IThreadPool.hpp
+++ b/Include/Aurora/Async/IThreadPool.hpp
@@ -93,13 +93,19 @@ namespace Aurora::Async
         static AuSPtr<IO::Net::INetWorker>     GetSelfIONetWorker();
 
         // Synchronization
+        
+        // Legacy Barrier: blocks a/a group of threads
         // Note: syncing to yourself will nullify requireSignal to prevent deadlock conditions
         virtual bool Sync(WorkerId_t workerId,
                           AuUInt32 timeoutMs = 0,
                           bool bRequireSignal = false) = 0;
 
+        // Legacy Barrier: wakes up a/a group of ::Sync()'d threads
         virtual void Signal(WorkerId_t workerId)                                          = 0;
         
+        // Breaks ::RunOnce()
+        virtual void Wakeup(WorkerId_t workerId) = 0;
+
         virtual AuSPtr<IO::Loop::ILoopSource> WorkerToLoopSource(WorkerId_t id)           = 0;
 
         virtual void SyncAllSafe()                                                        = 0;
diff --git a/Source/Async/AsyncApp.cpp b/Source/Async/AsyncApp.cpp
index 770b2618..885b2757 100644
--- a/Source/Async/AsyncApp.cpp
+++ b/Source/Async/AsyncApp.cpp
@@ -208,6 +208,11 @@ namespace Aurora::Async
         ThreadPool::Signal(workerId);
     }
 
+    void AsyncApp::Wakeup(WorkerId_t workerId)
+    {
+        ThreadPool::Wakeup(workerId);
+    }
+
     void AsyncApp::SyncAllSafe()
     {
         ThreadPool::SyncAllSafe();
diff --git a/Source/Async/AsyncApp.hpp b/Source/Async/AsyncApp.hpp
index 8f4c070a..30c587ed 100644
--- a/Source/Async/AsyncApp.hpp
+++ b/Source/Async/AsyncApp.hpp
@@ -38,6 +38,7 @@ namespace Aurora::Async
         bool Sync(WorkerId_t workerId, AuUInt32 timeoutMs = 0, bool requireSignal = false) override;
         AuSPtr<AuLoop::ILoopSource> WorkerToLoopSource(WorkerId_t id)           override;
         void Signal(WorkerId_t workerId)                                        override;
+        void Wakeup(WorkerId_t workerId)                                        override;
         void SyncAllSafe()                                                      override;
         void AddFeature(WorkerId_t id, AuSPtr<Threading::Threads::IThreadFeature> feature, bool async)  override;
         void AssertInThreadGroup(ThreadGroup_t group)                           override;
diff --git a/Source/Async/AuGroupState.cpp b/Source/Async/AuGroupState.cpp
index 1294450f..36f7c502 100644
--- a/Source/Async/AuGroupState.cpp
+++ b/Source/Async/AuGroupState.cpp
@@ -69,7 +69,7 @@ namespace Aurora::Async
         }
     }
 
-    void GroupState::SignalAll()
+    void GroupState::SignalAll(bool bHasWork)
     {
         AU_LOCK_GUARD(this->workersMutex);
 
@@ -80,7 +80,7 @@ namespace Aurora::Async
                 continue;
             }
 
-            pWorker->sync.SetEvent(true, true);
+            pWorker->sync.SetEvent(true, bHasWork);
         }
     }
 
diff --git a/Source/Async/AuGroupState.hpp b/Source/Async/AuGroupState.hpp
index f85643d4..087fa0e8 100644
--- a/Source/Async/AuGroupState.hpp
+++ b/Source/Async/AuGroupState.hpp
@@ -32,7 +32,7 @@ namespace Aurora::Async
 
         bool Init();
 
-        void SignalAll();
+        void SignalAll(bool bHasWork = true);
         void Decommit(ThreadId_t id);
 
         bool AddWorker(ThreadId_t id, AuSPtr<ThreadState> pState);
diff --git a/Source/Async/AuThreadState.cpp b/Source/Async/AuThreadState.cpp
index 33cf1ce6..f52453b2 100644
--- a/Source/Async/AuThreadState.cpp
+++ b/Source/Async/AuThreadState.cpp
@@ -74,6 +74,11 @@ namespace Aurora::Async
     
     void ThreadStateSync::SetEvent(bool bBoth, bool bHasWork)
     {
+        if (bHasWork)
+        {
+            AuAtomicAdd(&this->cvHasWork, 1u);
+        }
+
         if (auto pEvent = this->eventLs)
         {
             if (AuAtomicTestAndSet(&this->cvLSActive, 0u) == 0)
@@ -82,11 +87,6 @@ namespace Aurora::Async
             }
         }
 
-        if (bHasWork)
-        {
-            AuAtomicAdd(&this->cvHasWork, 1u);
-        }
-
         if (bBoth)
         {
             this->cvWorkMutex->Lock();
diff --git a/Source/Async/ThreadPool.cpp b/Source/Async/ThreadPool.cpp
index 83b7270c..d87a60e5 100644
--- a/Source/Async/ThreadPool.cpp
+++ b/Source/Async/ThreadPool.cpp
@@ -894,7 +894,7 @@ namespace Aurora::Async
 
         return true;
     }
-    
+
     void ThreadPool::Signal(WorkerId_t workerId)
     {
         auto group = GetGroup(workerId.first);
@@ -906,9 +906,22 @@ namespace Aurora::Async
                 jobWorker.second->running->Set();
             }
         }
-        else
+        else if (auto pThread = GetThreadHandle(workerId))
         {
-            GetThreadHandle(workerId)->running->Set();
+            pThread->running->Set();
+        }
+    }
+
+    void ThreadPool::Wakeup(WorkerId_t workerId)
+    {
+        auto group = GetGroup(workerId.first);
+        if (workerId.second == Async::kThreadIdAny)
+        {
+            group->SignalAll(false);
+        }
+        else if (auto pThread = GetThreadHandle(workerId))
+        {
+            pThread->sync.SetEvent(true, false);
         }
     }
 
diff --git a/Source/Async/ThreadPool.hpp b/Source/Async/ThreadPool.hpp
index 472ca406..e6bff9ac 100644
--- a/Source/Async/ThreadPool.hpp
+++ b/Source/Async/ThreadPool.hpp
@@ -70,6 +70,7 @@ namespace Aurora::Async
 
         virtual bool Sync(WorkerId_t workerId, AuUInt32 timeoutMs, bool requireSignal)                 override;
         virtual void Signal(WorkerId_t workerId)                                                       override;
+        virtual void Wakeup(WorkerId_t workerId)                                                       override;
         virtual AuSPtr<AuLoop::ILoopSource> WorkerToLoopSource(WorkerId_t id)                          override;
         virtual void SyncAllSafe()                                                                     override;