Code Salvage

- Integrated some code from the (soon to be obsolete) 2.0.0 branch,
  which is general in nature and will be needed.
- And the corresponding unit tests.

src/Thread.cpp

@@ -0,0 +1,79 @@
+////////////////////////////////////////////////////////////////////////////////
+// taskwarrior - a command line task list manager.
+//
+// Copyright 2006 - 2010, Paul Beckingham, Federico Hernandez.
+// All rights reserved.
+//
+// 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
+//
+////////////////////////////////////////////////////////////////////////////////
+#include <iostream>
+#include <Thread.h>
+
+////////////////////////////////////////////////////////////////////////////////
+Thread::Thread ()
+{
+}
+
+////////////////////////////////////////////////////////////////////////////////
+Thread::~Thread ()
+{
+}
+
+////////////////////////////////////////////////////////////////////////////////
+int Thread::start (void* inArg)
+{
+  mArg = inArg;
+  return pthread_create (&mTID, NULL, (void*(*)(void*)) Thread::entryPoint, (void*) this);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+void Thread::wait ()
+{
+  pthread_join (mTID, NULL);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+void Thread::cancel ()
+{
+  pthread_cancel (mTID);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+void Thread::detach ()
+{
+  pthread_detach (mTID);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+void* Thread::entryPoint (void* inThis)
+{
+  Thread* p = (Thread*) inThis;
+  p->execute (p->arg ());
+  return NULL;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+void* Thread::arg ()
+{
+  return mArg;
+}
+
+////////////////////////////////////////////////////////////////////////////////