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diff --git a/gdax-orderbook-hpp/demo/dependencies/libcds-2.3.2/cds/threading/details/gcc_manager.h b/gdax-orderbook-hpp/demo/dependencies/libcds-2.3.2/cds/threading/details/gcc_manager.h
new file mode 100644
index 0000000..a7e5afd
--- /dev/null
+++ b/gdax-orderbook-hpp/demo/dependencies/libcds-2.3.2/cds/threading/details/gcc_manager.h
@@ -0,0 +1,139 @@
+/*
+    This file is a part of libcds - Concurrent Data Structures library
+
+    (C) Copyright Maxim Khizhinsky (libcds.dev@gmail.com) 2006-2017
+
+    Source code repo: http://github.com/khizmax/libcds/
+    Download: http://sourceforge.net/projects/libcds/files/
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice, this
+      list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above copyright notice,
+      this list of conditions and the following disclaimer in the documentation
+      and/or other materials provided with the distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+    SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+    OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef CDSLIB_THREADING_DETAILS_GCC_MANAGER_H
+#define CDSLIB_THREADING_DETAILS_GCC_MANAGER_H
+
+#if !( CDS_COMPILER == CDS_COMPILER_GCC || CDS_COMPILER == CDS_COMPILER_CLANG || CDS_COMPILER == CDS_COMPILER_INTEL)
+#   error "threading/details/gcc_manager.h may be used only with GCC or Clang C++ compiler"
+#endif
+
+#include <cds/threading/details/_common.h>
+
+//@cond
+namespace cds { namespace threading {
+
+    //@cond
+    struct gcc_internal {
+        typedef unsigned char  ThreadDataPlaceholder[ sizeof(ThreadData) ];
+        static __thread ThreadDataPlaceholder CDS_DATA_ALIGNMENT(8) s_threadData;
+        static __thread ThreadData * s_pThreadData;
+    };
+    //@endcond
+
+    /// cds::threading::Manager implementation based on GCC __thread declaration
+    inline namespace gcc {
+
+        /// Thread-specific data manager based on GCC __thread feature
+        class Manager {
+        private :
+            //@cond
+
+            static ThreadData * _threadData()
+            {
+                return gcc_internal::s_pThreadData;
+            }
+
+            static ThreadData * create_thread_data()
+            {
+                if ( !gcc_internal::s_pThreadData ) {
+                    gcc_internal::s_pThreadData = new (gcc_internal::s_threadData) ThreadData();
+                }
+                return gcc_internal::s_pThreadData;
+            }
+
+            static void destroy_thread_data()
+            {
+                if ( gcc_internal::s_pThreadData ) {
+                    ThreadData * p = gcc_internal::s_pThreadData;
+                    gcc_internal::s_pThreadData = nullptr;
+                    p->ThreadData::~ThreadData();
+                }
+            }
+            //@endcond
+
+        public:
+            /// Initialize manager (empty function)
+            /**
+                This function is automatically called by cds::Initialize
+            */
+            static void init()
+            {}
+
+            /// Terminate manager (empty function)
+            /**
+                This function is automatically called by cds::Terminate
+            */
+            static void fini()
+            {}
+
+            /// Checks whether current thread is attached to \p libcds feature or not.
+            static bool isThreadAttached()
+            {
+                return _threadData() != nullptr;
+            }
+
+            /// This method must be called in beginning of thread execution
+            static void attachThread()
+            {
+                create_thread_data()->init();
+            }
+
+            /// This method must be called in end of thread execution
+            static void detachThread()
+            {
+                assert( _threadData());
+
+                if ( _threadData()->fini())
+                    destroy_thread_data();
+            }
+
+            /// Returns ThreadData pointer for the current thread
+            static ThreadData * thread_data()
+            {
+                ThreadData * p = _threadData();
+                assert( p );
+                return p;
+            }
+
+            //@cond
+            static size_t fake_current_processor()
+            {
+                return _threadData()->fake_current_processor();
+            }
+            //@endcond
+        };
+
+    } // namespace gcc
+
+}} // namespace cds::threading
+//@endcond
+
+#endif // #ifndef CDSLIB_THREADING_DETAILS_GCC_MANAGER_H