You're breathtaking!

Source/Engine/Threading/ThreadRegistry.cpp

@@ -0,0 +1,65 @@
+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#include "ThreadRegistry.h"
+#include "Engine/Core/Collections/Dictionary.h"
+#include "Engine/Platform/CriticalSection.h"
+
+namespace ThreadRegistryImpl
+{
+    Dictionary<uint64, Thread*> Registry(64);
+    CriticalSection Locker;
+}
+
+using namespace ThreadRegistryImpl;
+
+Thread* ThreadRegistry::GetThread(uint64 id)
+{
+    Thread* result = nullptr;
+
+    Locker.Lock();
+    Registry.TryGet(id, result);
+    Locker.Unlock();
+
+    return result;
+}
+
+int32 ThreadRegistry::Count()
+{
+    Locker.Lock();
+    int32 count = Registry.Count();
+    Locker.Unlock();
+
+    return count;
+}
+
+void ThreadRegistry::KillEmAll()
+{
+    Locker.Lock();
+    for (auto i = Registry.Begin(); i.IsNotEnd(); ++i)
+    {
+        i->Value->Kill(false);
+    }
+    Locker.Unlock();
+
+    // Now album Kill'Em All from Metallica...
+}
+
+void ThreadRegistry::Add(Thread* thread)
+{
+    ASSERT(thread && thread->GetID() != 0);
+
+    Locker.Lock();
+    ASSERT(!Registry.ContainsKey(thread->GetID()) && !Registry.ContainsValue(thread));
+    Registry.Add(thread->GetID(), thread);
+    Locker.Unlock();
+}
+
+void ThreadRegistry::Remove(Thread* thread)
+{
+    ASSERT(thread && thread->GetID() != 0);
+
+    Locker.Lock();
+    ASSERT_LOW_LAYER(Registry.ContainsKey(thread->GetID()) && Registry[thread->GetID()] == thread);
+    Registry.Remove(thread->GetID());
+    Locker.Unlock();
+}