--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/core/unix-system-thread.cc	Tue Jul 15 15:59:57 2008 -0700
@@ -0,0 +1,138 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2008 INRIA
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author: Mathieu Lacage <mathieu.lacage.inria.fr>
+ */
+
+#include <pthread.h>
+#include "fatal-error.h"
+#include "system-thread.h"
+#include "log.h"
+
+NS_LOG_COMPONENT_DEFINE ("SystemThread");
+
+namespace ns3 {
+
+//
+// Private implementation class for the SystemThread class.  The deal is
+// that we export the SystemThread class to the user.  The header just 
+// declares a class and its members.  There is a forward declaration for
+// a private implementation class there and a member declaration.  Thus
+// there is no knowledge of the implementation in the exported header.
+//
+// We provide an implementation class for each operating system.  This is
+// the Unix implementation of the SystemThread.
+//
+// In order to use the SystemThread, you will include "system-thread.h" and
+// get the implementation by linking unix-system-thread.cc (if you are running
+// a Posix system).
+//
+class SystemThreadImpl
+{
+public:
+  SystemThreadImpl (Callback<void> callback);
+
+  void Start (void);
+  void Join (void);
+
+private:
+  static void *DoRun (void *arg);
+  Callback<void> m_callback;
+  pthread_t m_thread;
+  void *    m_ret;
+};
+
+SystemThreadImpl::SystemThreadImpl (Callback<void> callback)
+  : m_callback (callback)
+{
+  NS_LOG_FUNCTION_NOARGS ();
+}
+
+  void
+SystemThreadImpl::Start (void)
+{
+  NS_LOG_FUNCTION_NOARGS ();
+
+  int rc = pthread_create (&m_thread, NULL, &SystemThreadImpl::DoRun,
+    (void *)this);
+
+  if (rc) 
+    {
+      NS_FATAL_ERROR ("pthread_create failed: " << rc << "=\"" << 
+        strerror(rc) << "\".");
+    }
+}
+
+  void 
+SystemThreadImpl::Join (void)
+{
+  NS_LOG_FUNCTION_NOARGS ();
+
+  void *thread_return;
+  int rc = pthread_join (m_thread, &thread_return);
+  if (rc) 
+    {
+      NS_FATAL_ERROR ("pthread_join failed: " << rc << "=\"" << 
+        strerror(rc) << "\".");
+    }
+}
+
+  void *
+SystemThreadImpl::DoRun (void *arg)
+{
+  NS_LOG_FUNCTION_NOARGS ();
+
+  SystemThreadImpl *self = static_cast<SystemThreadImpl *> (arg);
+  self->m_callback ();
+
+  return 0;
+}
+
+//
+// Remember that we just export the delcaration of the SystemThread class to
+// the user.  There is no code to implement the SystemThread methods.  We
+// have to do that here.  We just vector the calls to our implementation 
+// class above.
+//
+SystemThread::SystemThread (Callback<void> callback) 
+  : m_impl (new SystemThreadImpl (callback)),
+    m_count (1)
+{
+  NS_LOG_FUNCTION_NOARGS ();
+}
+  
+SystemThread::~SystemThread() 
+{
+  NS_LOG_FUNCTION_NOARGS ();
+  delete m_impl;
+}
+  
+  void 
+SystemThread::Start (void)
+{
+  NS_LOG_FUNCTION_NOARGS ();
+  m_impl->Start ();
+}
+  
+  void 
+SystemThread::Join (void) 
+{
+  NS_LOG_FUNCTION_NOARGS ();
+  m_impl->Join ();
+}  
+
+} // namespace ns3