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diff --git a/libcult/cult/sched/thread.hxx b/libcult/cult/sched/thread.hxx
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+// file      : cult/sched/thread.hxx
+// author    : Boris Kolpackov <boris@kolpackov.net>
+// copyright : Copyright (c) 2005-2010 Boris Kolpackov
+// license   : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#ifndef CULT_SCHED_THREAD_HXX
+#define CULT_SCHED_THREAD_HXX
+
+#include <cult/types/fundamental.hxx>
+#include <cult/types/shptr.hxx>
+
+#include <cult/sched/mutex.hxx>
+#include <cult/sched/exception.hxx>
+
+#include <cult/mm/new.hxx>
+
+#include <pthread.h>
+
+namespace Cult
+{
+  namespace Sched
+  {
+    // Instantiating an automatic variable of type Thread results
+    // in undefined behavior (read core dump).
+    //
+    class Thread: public MM::ServiceAwareObject
+    {
+    public:
+      struct Exception: virtual Sched::Exception {};
+
+    public:
+      virtual
+      ~Thread ();
+
+      Thread (Void* (*StartRoutine) (Void*), Void* arg = 0);
+
+      // Adopt an existing thread. Adoption of a detached thread
+      // results in undefined behavior. Adoption of an already
+      // adopted thread results in Adopted exception.
+      //
+
+      struct Adopted: virtual Exception {};
+
+      Thread ();
+
+    public:
+      // Joining an already joined thread results in Joined exception.
+      //
+
+      struct Joined: virtual Exception {};
+
+      //@@ Need to work out the cancelled case.
+      //
+      Void*
+      join ();
+
+      Void
+      cancel ();
+
+    public:
+      static Void
+      exit (Void* ret);
+
+      // self() may not be called in TSD destructors. Call to self() from
+      // a foreign thread (i.e., one that is neither native nor adopted)
+      // results in Foreign exception.
+      //
+
+      struct Foreign: virtual Exception {};
+
+      static Shptr<Thread>
+      self  ();
+
+      static Void
+      test_cancel ();
+
+    private:
+      pthread_t id_;
+
+      Boolean detached_;
+      Mutex mutex_;
+    };
+  }
+}
+
+#endif  // CULT_SCHED_THREAD_HXX