diff --git a/src/Reactor/LLVMReactor.cpp b/src/Reactor/LLVMReactor.cpp
index 70ada9c..f64f910 100644
--- a/src/Reactor/LLVMReactor.cpp
+++ b/src/Reactor/LLVMReactor.cpp
@@ -19,7 +19,6 @@
 
 #include "CPUID.hpp"
 #include "ExecutableMemory.hpp"
-#include "MutexLock.hpp"
 #include "Thread.hpp"
 #include "x86.hpp"
 
diff --git a/src/Reactor/MutexLock.hpp b/src/Reactor/MutexLock.hpp
deleted file mode 100644
index 94b37f0..0000000
--- a/src/Reactor/MutexLock.hpp
+++ /dev/null
@@ -1,179 +0,0 @@
-// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//    http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef rr_MutexLock_hpp
-#define rr_MutexLock_hpp
-
-#include "Thread.hpp"
-
-#if defined(__linux__)
-// Use a pthread mutex on Linux. Since many processes may use Reactor
-// at the same time it's best to just have the scheduler overhead.
-#	include <pthread.h>
-
-namespace rr {
-
-class MutexLock
-{
-public:
-	MutexLock()
-	{
-		pthread_mutex_init(&mutex, NULL);
-	}
-
-	~MutexLock()
-	{
-		pthread_mutex_destroy(&mutex);
-	}
-
-	bool attemptLock()
-	{
-		return pthread_mutex_trylock(&mutex) == 0;
-	}
-
-	void lock()
-	{
-		pthread_mutex_lock(&mutex);
-	}
-
-	void unlock()
-	{
-		pthread_mutex_unlock(&mutex);
-	}
-
-private:
-	pthread_mutex_t mutex;
-};
-
-}  // namespace rr
-
-#else  // !__linux__
-
-#	include <atomic>
-
-namespace rr {
-
-class BackoffLock
-{
-public:
-	BackoffLock()
-	{
-		mutex = 0;
-	}
-
-	bool attemptLock()
-	{
-		if(!isLocked())
-		{
-			if(mutex.exchange(true) == false)
-			{
-				return true;
-			}
-		}
-
-		return false;
-	}
-
-	void lock()
-	{
-		int backoff = 1;
-
-		while(!attemptLock())
-		{
-			if(backoff <= 64)
-			{
-				for(int i = 0; i < backoff; i++)
-				{
-					nop();
-					nop();
-					nop();
-					nop();
-					nop();
-
-					nop();
-					nop();
-					nop();
-					nop();
-					nop();
-
-					nop();
-					nop();
-					nop();
-					nop();
-					nop();
-
-					nop();
-					nop();
-					nop();
-					nop();
-					nop();
-
-					nop();
-					nop();
-					nop();
-					nop();
-					nop();
-
-					nop();
-					nop();
-					nop();
-					nop();
-					nop();
-
-					nop();
-					nop();
-					nop();
-					nop();
-					nop();
-				}
-
-				backoff *= 2;
-			}
-			else
-			{
-				Thread::yield();
-
-				backoff = 1;
-			}
-		};
-	}
-
-	void unlock()
-	{
-		mutex.store(false, std::memory_order_release);
-	}
-
-	bool isLocked()
-	{
-		return mutex.load(std::memory_order_acquire);
-	}
-
-private:
-	struct
-	{
-		// Ensure that the mutex variable is on its own 64-byte cache line to avoid false sharing
-		// Padding must be public to avoid compiler warnings
-		volatile int padding1[16];
-		std::atomic<bool> mutex;
-		volatile int padding2[15];
-	};
-};
-
-using MutexLock = BackoffLock;
-
-}  // namespace rr
-
-#endif  // !__linux__
-
-#endif  // rr_MutexLock_hpp
diff --git a/src/Reactor/Reactor.vcxproj b/src/Reactor/Reactor.vcxproj
index 4f6ef61..31723c3 100644
--- a/src/Reactor/Reactor.vcxproj
+++ b/src/Reactor/Reactor.vcxproj
@@ -298,7 +298,6 @@
     <ClInclude Include="LLVMReactor.hpp" />
     <ClInclude Include="LLVMReactorDebugInfo.hpp" />
     <ClInclude Include="ExecutableMemory.hpp" />
-    <ClInclude Include="MutexLock.hpp" />
     <ClInclude Include="Nucleus.hpp" />
     <ClInclude Include="Print.hpp" />
     <ClInclude Include="Reactor.hpp" />
diff --git a/src/Reactor/Reactor.vcxproj.filters b/src/Reactor/Reactor.vcxproj.filters
index 22c1a6b..09796d9 100644
--- a/src/Reactor/Reactor.vcxproj.filters
+++ b/src/Reactor/Reactor.vcxproj.filters
@@ -68,9 +68,6 @@
     <ClInclude Include="ExecutableMemory.hpp">
       <Filter>Header Files</Filter>
     </ClInclude>
-    <ClInclude Include="MutexLock.hpp">
-      <Filter>Header Files</Filter>
-    </ClInclude>
     <ClInclude Include="Thread.hpp">
       <Filter>Header Files</Filter>
     </ClInclude>