diff --git a/src/Makefile.am b/src/Makefile.am
index 186acc33..c93f41c0 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -53,7 +53,7 @@ SRCS =  Socket.h\
 	LogFactory.cc LogFactory.h\
 	TimerA2.cc TimerA2.h\
 	TimeA2.cc TimeA2.h\
-	SharedHandle.h\
+	SharedHandle.cc SharedHandle.h\
 	FeatureConfig.cc FeatureConfig.h\
 	DownloadEngineFactory.cc DownloadEngineFactory.h\
 	SpeedCalc.cc SpeedCalc.h\
diff --git a/src/SharedHandle.cc b/src/SharedHandle.cc
new file mode 100644
index 00000000..9986f2f9
--- /dev/null
+++ b/src/SharedHandle.cc
@@ -0,0 +1,121 @@
+/* <!-- copyright */
+/*
+ * aria2 - The high speed download utility
+ *
+ * Copyright (C) 2012 Tatsuhiro Tsujikawa
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of portions of this program with the
+ * OpenSSL library under certain conditions as described in each
+ * individual source file, and distribute linked combinations
+ * including the two.
+ * You must obey the GNU General Public License in all respects
+ * for all of the code used other than OpenSSL.  If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so.  If you
+ * do not wish to do so, delete this exception statement from your
+ * version.  If you delete this exception statement from all source
+ * files in the program, then also delete it here.
+ */
+/* copyright --> */
+#include "SharedHandle.h"
+
+namespace aria2 {
+
+SharedCount::SharedCount():refCount_(new RefCount()) {}
+
+SharedCount::SharedCount(const SharedCount& s):refCount_(s.refCount_)
+{
+  refCount_->addRefCount();
+}
+
+SharedCount::~SharedCount()
+{
+  refCount_->releaseRefCount();
+  if(refCount_->getWeakRefCount() == 0) {
+    delete refCount_;
+  }
+}
+
+bool SharedCount::reassign(const SharedCount& s)
+{
+  s.refCount_->addRefCount();
+  refCount_->releaseRefCount();
+  if(refCount_->getWeakRefCount() == 0) {
+    delete refCount_;
+    refCount_ = s.refCount_;
+    return true;
+  }
+  size_t thisCount = refCount_->getStrongRefCount();
+  refCount_ = s.refCount_;
+  return thisCount == 0;
+}
+
+void SharedCount::swap(SharedCount& r)
+{
+  std::swap(refCount_, r.refCount_);
+}
+
+WeakCount::WeakCount(const WeakRef& t):refCount_(new RefCount(t)) {}
+
+WeakCount::WeakCount(const StrongRef& t):refCount_(new RefCount()) {}
+
+WeakCount::WeakCount(const WeakCount& w):refCount_(w.refCount_)
+{
+  refCount_->addWeakRefCount();
+}
+
+WeakCount::WeakCount(const SharedCount& s):refCount_(s.refCount_)
+{
+  refCount_->addWeakRefCount();
+}
+
+WeakCount::~WeakCount()
+{
+  refCount_->releaseWeakRefCount();
+  if(refCount_->getWeakRefCount() == 0) {
+    delete refCount_;
+  }
+}
+
+bool WeakCount::reassign(const SharedCount& s)
+{
+  s.refCount_->addWeakRefCount();
+  refCount_->releaseWeakRefCount();
+  if(refCount_->getWeakRefCount() == 0) {
+    delete refCount_;
+    refCount_ = s.refCount_;
+    return true;
+  }
+  refCount_ = s.refCount_;
+  return false;
+}
+
+bool WeakCount::reassign(const WeakCount& s)
+{
+  s.refCount_->addWeakRefCount();
+  refCount_->releaseWeakRefCount();
+  if(refCount_->getWeakRefCount() == 0) {
+    delete refCount_;
+    refCount_ = s.refCount_;
+    return true;
+  }
+  refCount_ = s.refCount_;
+  return false;
+}
+
+} // namespace aria2
diff --git a/src/SharedHandle.h b/src/SharedHandle.h
index 9f0d5eed..5c94c205 100644
--- a/src/SharedHandle.h
+++ b/src/SharedHandle.h
@@ -2,7 +2,7 @@
 /*
  * aria2 - The high speed download utility
  *
- * Copyright (C) 2006 Tatsuhiro Tsujikawa
+ * Copyright (C) 2012 Tatsuhiro Tsujikawa
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -93,93 +93,38 @@ private:
 
   RefCount* refCount_;
 public:
-  SharedCount():refCount_(new RefCount()) {}
+  SharedCount();
 
-  SharedCount(const SharedCount& s):refCount_(s.refCount_)
-  {
-    refCount_->addRefCount();
-  }
+  SharedCount(const SharedCount& s);
 
-  ~SharedCount() {
-    refCount_->releaseRefCount();
-    if(refCount_->getWeakRefCount() == 0) {
-      delete refCount_;
-    }
-  }
+  ~SharedCount();
 
-  bool reassign(const SharedCount& s) {
-    s.refCount_->addRefCount();
-    refCount_->releaseRefCount();
-    if(refCount_->getWeakRefCount() == 0) {
-      delete refCount_;
-      refCount_ = s.refCount_;
-      return true;
-    }
-    size_t thisCount = refCount_->getStrongRefCount();
-    refCount_ = s.refCount_;
-    return thisCount == 0;
-  }
+  bool reassign(const SharedCount& s);
 
   inline size_t getRefCount() const { return refCount_->getStrongRefCount(); }
 
-  void swap(SharedCount& r)
-  {
-    std::swap(refCount_, r.refCount_);
-  }
+  void swap(SharedCount& r);
 };
 
 class WeakCount {
 private:
   RefCount* refCount_;
 public:
-  WeakCount(const WeakRef& t):refCount_(new RefCount(t)) {}
+  WeakCount(const WeakRef& t);
 
-  WeakCount(const StrongRef& t):refCount_(new RefCount()) {}
+  WeakCount(const StrongRef& t);
 
-  WeakCount(const WeakCount& w):refCount_(w.refCount_)
-  {
-    refCount_->addWeakRefCount();
-  }
+  WeakCount(const WeakCount& w);
 
-  WeakCount(const SharedCount& s):refCount_(s.refCount_)
-  {
-    refCount_->addWeakRefCount();
-  }
+  WeakCount(const SharedCount& s);
 
-  ~WeakCount()
-  {
-    refCount_->releaseWeakRefCount();
-    if(refCount_->getWeakRefCount() == 0) {
-      delete refCount_;
-    }
-  }
+  ~WeakCount();
 
-  bool reassign(const SharedCount& s) {
-    s.refCount_->addWeakRefCount();
-    refCount_->releaseWeakRefCount();
-    if(refCount_->getWeakRefCount() == 0) {
-      delete refCount_;
-      refCount_ = s.refCount_;
-      return true;
-    }
-    refCount_ = s.refCount_;
-    return false;
-  }
+  bool reassign(const SharedCount& s);
 
-  bool reassign(const WeakCount& s) {
-    s.refCount_->addWeakRefCount();
-    refCount_->releaseWeakRefCount();
-    if(refCount_->getWeakRefCount() == 0) {
-      delete refCount_;
-      refCount_ = s.refCount_;
-      return true;
-    }
-    refCount_ = s.refCount_;
-    return false;
-  }
+  bool reassign(const WeakCount& s);
 
   inline size_t getRefCount() const { return refCount_->getStrongRefCount(); }
-
 };
 
 template<typename T>