threading_ucontext.h

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/*
 *  This file is part of SST/macroscale:
 *               The macroscale architecture simulator from the SST suite.
 *  Copyright (c) 2009 Sandia Corporation.
 *  This software is distributed under the BSD License.
 *  Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
 *  the U.S. Government retains certain rights in this software.
 *  For more information, see the LICENSE file in the top
 *  SST/macroscale directory.
 */

#ifndef SSTMAC_SOFTWARE_THREADING_THREADING_UCONTEXT_H_INCLUDED
#define SSTMAC_SOFTWARE_THREADING_THREADING_UCONTEXT_H_INCLUDED

#include <sstmac/software/threading/threading_interface.h>

#ifdef SSTMAC_HAVE_UCONTEXT

#include <ucontext.h>
#include <sstmac/software/threading/context_util.h>

#endif

namespace sstmac {
namespace sw {

#ifdef SSTMAC_HAVE_UCONTEXT

class threading_ucontext : public threading_interface
{
 private:
  ucontext_t context_;

 public:

  /// Initializing a context.
  virtual void
  init_context();

  virtual
  threading_interface* copy() {
    return new threading_ucontext();
  }


  virtual void
  destroy_context() {
  }

  /// Start a new context.
  virtual void
  start_context(int physical_thread_id, void *stack, size_t stacksize, void
                (*func)(void*), void *args, threading_interface *yield_to);

  /// Swap context.
  virtual void
  swap_context(threading_interface *to);

  /// This is called when we have completed running the thread. It is
  /// called in the from context.
  inline void
  complete_context(threading_interface *to) {
    swap_context(to);
  }

};

#endif

}
} // end of namespace sstmac
#endif