diff --git a/Test/main.cpp b/Test/main.cpp
index eb45e87..ba91e3f 100644
--- a/Test/main.cpp
+++ b/Test/main.cpp
@@ -208,8 +208,12 @@ void TestMatrix(int argc, char* argv[]){
 
   int num_row = 8, num_col = 3592;
   int size = num_row * num_col;
-  MatrixWorkerTable<int>* worker_table = new MatrixWorkerTable<int>(num_row, num_col);
-  MatrixServerTable<int>* server_table = new MatrixServerTable<int>(num_row, num_col);
+  // MatrixWorkerTable<int>* worker_table = new MatrixWorkerTable<int>(num_row, num_col);
+  // MatrixServerTable<int>* server_table = new MatrixServerTable<int>(num_row, num_col);
+  MatrixTableOption<int> option;
+  option.num_row = num_row;
+  option.num_col = num_col;
+  MatrixWorkerTable<int>* worker_table = multiverso::MV_CreateTable(option);
   std::thread* m_prefetchThread = nullptr;
   MV_Barrier();
   int count = 0;
@@ -258,6 +262,7 @@ void TestMatrix(int argc, char* argv[]){
     MV_Barrier();
 
   }
+  delete worker_table;
   MV_ShutDown();
 }
 
diff --git a/include/multiverso/actor.h b/include/multiverso/actor.h
index 1318a9b..531eed0 100644
--- a/include/multiverso/actor.h
+++ b/include/multiverso/actor.h
@@ -1,15 +1,15 @@
 #ifndef MULTIVERSO_ACTOR_H_
 #define MULTIVERSO_ACTOR_H_
 
-#include <atomic>
 #include <functional>
 #include <memory>
 #include <string>
-#include <thread>
 #include <unordered_map>
 
 #include "multiverso/message.h"
 
+namespace std { class thread; }
+
 namespace multiverso {
 
 template<typename T> class MtQueue;
@@ -47,7 +47,6 @@ protected:
   std::unique_ptr<MtQueue<MessagePtr> > mailbox_;
   // message handlers function
   std::unordered_map<int, Handler> handlers_;
-  // std::atomic_bool is_working_;
   bool is_working_;
 private:
   std::string name_;
diff --git a/include/multiverso/blob.h b/include/multiverso/blob.h
index 29f138f..21cd8e3 100644
--- a/include/multiverso/blob.h
+++ b/include/multiverso/blob.h
@@ -7,80 +7,57 @@
 #include <iostream>
 
 #include "multiverso/util/log.h"
-#include "multiverso/util/allocator.h"
 
 namespace multiverso {
 
-  // Manage a chunk of memory. Blob can share memory with other Blobs.
-  // Never use external memory. All external memory should be managed by itself
-  // TODO(feiga): maybe make blob also not hold memory?
-  class Blob {
-  public:
-    // an empty blob
-    Blob() : data_(nullptr) {}
+// Manage a chunk of memory. Blob can share memory with other Blobs.
+// Never use external memory. All external memory should be managed by itself
+// TODO(feiga): maybe make blob also not hold memory?
+class Blob {
+public:
+  // an empty blob
+  Blob() : data_(nullptr) {}
 
-    explicit Blob(size_t size) : size_(size) {
-      CHECK(size > 0);
-      data_ = Allocator::Get()->Alloc(size);
-      //data_.reset(new char[size]);
-    }
+  explicit Blob(size_t size);
 
-    // Construct from external memory. Will copy a new piece
-    Blob(const void* data, size_t size) : size_(size) {
-      data_ = Allocator::Get()->Alloc(size);
-      memcpy(data_, data, size_);
-    }
+  // Construct from external memory. Will copy a new piece
+  Blob(const void* data, size_t size);
 
-    Blob(void* data, size_t size) : size_(size) {
-      data_ = Allocator::Get()->Alloc(size);
-      memcpy(data_, data, size_);
-    }
+  Blob(void* data, size_t size);
 
-    Blob(const Blob& rhs) {
-      Allocator::Get()->Refer(rhs.data_);
-      this->data_ = rhs.data_;
-      this->size_ = rhs.size_;
-    }
+  Blob(const Blob& rhs);
 
-    ~Blob() {
-      if (data_ != nullptr) {
-        Allocator::Get()->Free(data_);
-      }
-    }
+  ~Blob();
 
-    // Shallow copy by default. Call \ref CopyFrom for a deep copy
-    void operator=(const Blob& rhs) {
-      Allocator::Get()->Refer(rhs.data_);
-      this->data_ = rhs.data_;
-      this->size_ = rhs.size_;
-    }
+  // Shallow copy by default. Call \ref CopyFrom for a deep copy
+  void operator=(const Blob& rhs);
 
-    inline char operator[](size_t i) const {
-      CHECK(0 <= i && i < size_);
-      return data_[i];
-    }
+  inline char operator[](size_t i) const {
+    CHECK(0 <= i && i < size_);
+    return data_[i];
+  }
 
-    template <typename T>
-    inline T& As(size_t i = 0) const {
-      CHECK(size_ % sizeof(T) == 0 && i < size_ / sizeof(T));
-      return (reinterpret_cast<T*>(data_))[i];
-    }
-    template <typename T>
-    inline size_t size() const { return size_ / sizeof(T); }
+  template <typename T>
+  inline T& As(size_t i = 0) const {
+    CHECK(size_ % sizeof(T) == 0 && i < size_ / sizeof(T));
+    return (reinterpret_cast<T*>(data_))[i];
+  }
+  template <typename T>
+  inline size_t size() const { return size_ / sizeof(T); }
 
-    // DeepCopy, for a shallow copy, use operator=
-    void CopyFrom(const Blob& src);
+  // DeepCopy, for a shallow copy, use operator=
+  void CopyFrom(const Blob& src);
 
-    inline char* data() const { return data_; }
-    inline size_t size() const { return size_; }
+  inline char* data() const { return data_; }
+  inline size_t size() const { return size_; }
 
-  private:
+private:
 
-    // Memory is shared and auto managed
-    //std::shared_ptr<char> data_;
-    char *data_;
-    size_t size_;
-  };
+  // Memory is shared and auto managed
+  //std::shared_ptr<char> data_;
+  char *data_;
+  size_t size_;
+};
 
 }  // namespace multiverso
 
diff --git a/include/multiverso/table/matrix_table.h b/include/multiverso/table/matrix_table.h
index 89c12ca..2b8d9bb 100644
--- a/include/multiverso/table/matrix_table.h
+++ b/include/multiverso/table/matrix_table.h
@@ -9,10 +9,16 @@
 
 namespace multiverso {
 
+template <typename T>
+struct MatrixTableOption;
+
 template <typename T>
 class MatrixWorkerTable : public WorkerTable {
 public:
+  explicit MatrixWorkerTable(const MatrixTableOption<T>& option);
+
   MatrixWorkerTable(integer_t num_row, integer_t num_col);
+
   ~MatrixWorkerTable();
 
   // get whole table, data is user-allocated memory
@@ -55,6 +61,8 @@ class Updater;
 template <typename T>
 class MatrixServerTable : public ServerTable {
 public:
+  explicit MatrixServerTable(const MatrixTableOption<T>& option);
+
   MatrixServerTable(integer_t num_row, integer_t num_col);
 
   void ProcessAdd(const std::vector<Blob>& data) override;
@@ -74,6 +82,13 @@ protected:
   std::vector<T> storage_;
 };
 
+template <typename T>
+struct MatrixTableOption {
+  integer_t num_row;
+  integer_t num_col;
+  DEFINE_TABLE_TYPE(T, MatrixWorkerTable, MatrixServerTable);
+};
+
 }
 
 #endif // MULTIVERSO_MATRIX_TABLE_H_
diff --git a/include/multiverso/table_interface.h b/include/multiverso/table_interface.h
index d53c6d6..e4ed373 100644
--- a/include/multiverso/table_interface.h
+++ b/include/multiverso/table_interface.h
@@ -1,7 +1,6 @@
 #ifndef MULTIVERSO_TABLE_INTERFACE_H_
 #define MULTIVERSO_TABLE_INTERFACE_H_
 
-#include <mutex>
 #include <string>
 #include <unordered_map>
 #include <vector>
@@ -10,6 +9,8 @@
 #include "multiverso/blob.h"
 #include "multiverso/io/io.h"
 
+namespace std { class mutex; }
+
 namespace multiverso {
 
 typedef int32_t integer_t;
@@ -22,7 +23,7 @@ struct GetOption;
 class WorkerTable {
 public:
   WorkerTable();
-  virtual ~WorkerTable() = default;
+  virtual ~WorkerTable();
 
   void Get(Blob keys, const GetOption* option = nullptr);
   void Add(Blob keys, Blob values, const AddOption* option = nullptr);
@@ -46,7 +47,7 @@ private:
   std::string table_name_;
   // assuming there are at most 2^32 tables
   int table_id_;
-  std::mutex m_;
+  std::mutex* m_;
   std::vector<Waiter*> waitings_;
   int msg_id_;
 };
diff --git a/include/multiverso/util/allocator.h b/include/multiverso/util/allocator.h
index afaa4fa..0b4e5f6 100644
--- a/include/multiverso/util/allocator.h
+++ b/include/multiverso/util/allocator.h
@@ -1,10 +1,11 @@
 #ifndef MULTIVERSO_ALLOCATOR_H_
 #define MULTIVERSO_ALLOCATOR_H_
 
-#include <mutex>
 #include <atomic>
 #include <unordered_map>
 
+namespace std { class mutex; }
+
 namespace multiverso {
 
 const size_t g_pointer_size = sizeof(void*);
@@ -19,7 +20,7 @@ public:
 private:
   MemoryBlock* free_ = nullptr;
   size_t size_;
-  std::mutex mutex_;
+  std::mutex* mutex_;
 };
 
 class MemoryBlock {
@@ -49,13 +50,14 @@ private:
 
 class SmartAllocator : public Allocator {
 public:
+  SmartAllocator();
+  ~SmartAllocator();
   char* Alloc(size_t size);
   void Free(char* data);
   void Refer(char *data);
-  ~SmartAllocator();
 private:
   std::unordered_map<size_t, FreeList*> pools_;
-  std::mutex mutex_;
+  std::mutex* mutex_;
 };
 
 } // namespace multiverso
diff --git a/include/multiverso/zoo.h b/include/multiverso/zoo.h
index 4aa4a38..dfe2aa2 100644
--- a/include/multiverso/zoo.h
+++ b/include/multiverso/zoo.h
@@ -1,7 +1,6 @@
 #ifndef MULTIVERSO_ZOO_H_
 #define MULTIVERSO_ZOO_H_
 
-#include <atomic>
 #include <string>
 #include <vector>
 #include <unordered_map>
diff --git a/src/Multiverso.vcxproj b/src/Multiverso.vcxproj
index 8396fc7..cde8af2 100644
--- a/src/Multiverso.vcxproj
+++ b/src/Multiverso.vcxproj
@@ -211,6 +211,7 @@
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="actor.cpp" />
+    <ClCompile Include="blob.cpp" />
     <ClCompile Include="communicator.cpp" />
     <ClCompile Include="controller.cpp" />
     <ClCompile Include="dashboard.cpp" />
diff --git a/src/Multiverso.vcxproj.filters b/src/Multiverso.vcxproj.filters
index 755089c..91e0a44 100644
--- a/src/Multiverso.vcxproj.filters
+++ b/src/Multiverso.vcxproj.filters
@@ -221,5 +221,8 @@
     <ClCompile Include="table_factory.cpp">
       <Filter>system</Filter>
     </ClCompile>
+    <ClCompile Include="blob.cpp">
+      <Filter>system</Filter>
+    </ClCompile>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/src/actor.cpp b/src/actor.cpp
index 4fe6dae..6335eb5 100644
--- a/src/actor.cpp
+++ b/src/actor.cpp
@@ -2,6 +2,7 @@
 
 #include <chrono>
 #include <string>
+#include <thread>
 
 #include "multiverso/message.h"
 #include "multiverso/util/log.h"
diff --git a/src/blob.cpp b/src/blob.cpp
new file mode 100644
index 0000000..11f1ede
--- /dev/null
+++ b/src/blob.cpp
@@ -0,0 +1,42 @@
+#include "multiverso/blob.h"
+
+#include "multiverso/util/allocator.h"
+
+namespace multiverso {
+
+Blob::Blob(size_t size) : size_(size) {
+  CHECK(size > 0);
+  data_ = Allocator::Get()->Alloc(size);
+  //data_.reset(new char[size]);
+}
+
+// Construct from external memory. Will copy a new piece
+Blob::Blob(const void* data, size_t size) : size_(size) {
+  data_ = Allocator::Get()->Alloc(size);
+  memcpy(data_, data, size_);
+}
+
+Blob::Blob(void* data, size_t size) : size_(size) {
+  data_ = Allocator::Get()->Alloc(size);
+  memcpy(data_, data, size_);
+}
+
+Blob::Blob(const Blob& rhs) {
+  Allocator::Get()->Refer(rhs.data_);
+  this->data_ = rhs.data_;
+  this->size_ = rhs.size_;
+}
+
+Blob::~Blob() {
+  if (data_ != nullptr) {
+    Allocator::Get()->Free(data_);
+  }
+}
+
+// Shallow copy by default. Call \ref CopyFrom for a deep copy
+void Blob::operator=(const Blob& rhs) {
+  Allocator::Get()->Refer(rhs.data_);
+  this->data_ = rhs.data_;
+  this->size_ = rhs.size_;
+}
+}
\ No newline at end of file
diff --git a/src/communicator.cpp b/src/communicator.cpp
index 058ff6a..bf03656 100644
--- a/src/communicator.cpp
+++ b/src/communicator.cpp
@@ -1,6 +1,7 @@
 #include "multiverso/communicator.h"
 
 #include <memory>
+#include <thread>
 
 #include "multiverso/zoo.h"
 #include "multiverso/net.h"
@@ -10,7 +11,6 @@
 namespace multiverso {
 
 namespace message {
-// TODO(feiga): refator the ugly statement
 bool to_server(MsgType type) {
   return (static_cast<int>(type)) > 0 &&
          (static_cast<int>(type)) < 32;
@@ -24,7 +24,6 @@ bool to_worker(MsgType type) {
 bool to_controler(MsgType type) {
   return (static_cast<int>(type)) > 32;
 }
-
 }  // namespace message
 
 Communicator::Communicator() : Actor(actor::kCommunicator) {
diff --git a/src/table.cpp b/src/table.cpp
index d5939d2..bcbfb71 100644
--- a/src/table.cpp
+++ b/src/table.cpp
@@ -12,9 +12,14 @@ namespace multiverso {
 
 WorkerTable::WorkerTable() {
   msg_id_ = 0;
+  m_ = new std::mutex();
   table_id_ = Zoo::Get()->RegisterTable(this);
 }
 
+WorkerTable::~WorkerTable() {
+  delete m_;
+}
+
 ServerTable::ServerTable() {
   Zoo::Get()->RegisterTable(this);
 }
@@ -36,10 +41,10 @@ void WorkerTable::Add(Blob keys, Blob values,
 
 int WorkerTable::GetAsync(Blob keys,
                           const GetOption* option) {
-  m_.lock();
+  m_->lock();
   int id = msg_id_++;
   waitings_.push_back(new Waiter());
-  m_.unlock();
+  m_->unlock();
   MessagePtr msg(new Message());
   msg->set_src(Zoo::Get()->rank());
   msg->set_type(MsgType::Request_Get);
@@ -57,10 +62,10 @@ int WorkerTable::GetAsync(Blob keys,
 
 int WorkerTable::AddAsync(Blob keys, Blob values,
                           const AddOption* option) {
-  m_.lock();
+  m_->lock();
   int id = msg_id_++;
   waitings_.push_back(new Waiter());
-  m_.unlock();
+  m_->unlock();
   MessagePtr msg(new Message());
   msg->set_src(Zoo::Get()->rank());
   msg->set_type(MsgType::Request_Add);
@@ -79,31 +84,31 @@ int WorkerTable::AddAsync(Blob keys, Blob values,
 
 void WorkerTable::Wait(int id) {
   // CHECK(waitings_.find(id) != waitings_.end());
-  m_.lock();
+  m_->lock();
   CHECK(waitings_[id] != nullptr);
   Waiter* w = waitings_[id];
-  m_.unlock();
+  m_->unlock();
 
   w->Wait();
 
-  m_.lock();
+  m_->lock();
   delete waitings_[id];
   waitings_[id] = nullptr;
-  m_.unlock();
+  m_->unlock();
 }
 
 void WorkerTable::Reset(int msg_id, int num_wait) {
-  m_.lock();
+  m_->lock();
   CHECK_NOTNULL(waitings_[msg_id]);
   waitings_[msg_id]->Reset(num_wait);
-  m_.unlock();
+  m_->unlock();
 }
 
 void WorkerTable::Notify(int id) {
-  m_.lock();
+  m_->lock();
   CHECK_NOTNULL(waitings_[id]);
   waitings_[id]->Notify();
-  m_.unlock();
+  m_->unlock();
 }
 
 }  // namespace multiverso
diff --git a/src/table/matrix_table.cpp b/src/table/matrix_table.cpp
index b66f799..5846f58 100644
--- a/src/table/matrix_table.cpp
+++ b/src/table/matrix_table.cpp
@@ -9,6 +9,10 @@
 
 namespace multiverso {
 
+template <typename T>
+MatrixWorkerTable<T>::MatrixWorkerTable(const MatrixTableOption<T>& option) :
+MatrixWorkerTable(option.num_row, option.num_col) {}
+
 template <typename T>
 MatrixWorkerTable<T>::MatrixWorkerTable(integer_t num_row, integer_t num_col) :
   WorkerTable(), num_row_(num_row), num_col_(num_col) {
@@ -226,8 +230,9 @@ void MatrixWorkerTable<T>::ProcessReplyGet(std::vector<Blob>& reply_data) {
   if (--get_reply_count_ == 0) {  }
 }
 
-
-
+template <typename T>
+MatrixServerTable<T>::MatrixServerTable(const MatrixTableOption<T>& option) :
+MatrixServerTable(option.num_row, option.num_col) {}
 
 template <typename T>
 MatrixServerTable<T>::MatrixServerTable(integer_t num_row, integer_t num_col) :
diff --git a/src/util/allocator.cpp b/src/util/allocator.cpp
index 2ee1c41..a8226a4 100644
--- a/src/util/allocator.cpp
+++ b/src/util/allocator.cpp
@@ -1,5 +1,7 @@
 #include "multiverso/util/allocator.h"
 
+#include <mutex>
+
 #include "multiverso/util/log.h"
 #include "multiverso/util/configure.h"
 
@@ -27,8 +29,8 @@ inline void AlignFree(char *data) {
 #endif
 }
 
-inline FreeList::FreeList(size_t size) :
-size_(size) {
+inline FreeList::FreeList(size_t size) : size_(size) {
+  mutex_ = new std::mutex();
   free_ = new MemoryBlock(size, this);
 }
 
@@ -42,7 +44,7 @@ FreeList::~FreeList() {
 }
 
 inline char* FreeList::Pop() {
-  std::lock_guard<std::mutex> lock(mutex_);
+  std::lock_guard<std::mutex> lock(*mutex_);
   if (free_ == nullptr) {
     free_ = new MemoryBlock(size_, this);
   }
@@ -52,7 +54,7 @@ inline char* FreeList::Pop() {
 }
 
 inline void FreeList::Push(MemoryBlock*block) {
-  std::lock_guard<std::mutex> lock(mutex_);
+  std::lock_guard<std::mutex> lock(*mutex_);
   block->next = free_;
   free_ = block;
 }
@@ -98,7 +100,7 @@ char* SmartAllocator::Alloc(size_t size) {
     size += 1;
   }
 
-  std::unique_lock<std::mutex> lock(mutex_);
+  std::unique_lock<std::mutex> lock(*mutex_);
   if (pools_[size] == nullptr) {
     pools_[size] = new FreeList(size);
   }
@@ -115,8 +117,13 @@ void SmartAllocator::Refer(char *data) {
   (*(MemoryBlock**)(data - g_pointer_size))->Link();
 }
 
+SmartAllocator::SmartAllocator() {
+  mutex_ = new std::mutex();
+}
+
 SmartAllocator::~SmartAllocator() {
   Log::Debug("~SmartAllocator, final pool size: %d\n", pools_.size());
+  delete mutex_;
   for (auto i : pools_) {
     delete i.second;
   }