src/hoard/src/heaplayers/util/sllist.h

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// -*- C++ -*-

/*

  Heap Layers: An Extensible Memory Allocation Infrastructure
  
  Copyright (C) 2000-2003 by Emery Berger
  http://www.cs.umass.edu/~emery
  emery@cs.umass.edu
  
  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/

#ifndef _SLLIST_H_
#define _SLLIST_H_

#include <assert.h>

namespace HL {

  class SLList {
  public:
    
    inline SLList (void) {
      clear();
    }

    class Entry;
  
    inline void clear (void) {
      head.next = NULL;
    }

    inline Entry * get (void) {
      const Entry * e = head.next;
      if (e == NULL) {
        return NULL;
      }
      head.next = e->next;
      return (Entry *) e;
    }

  private:

    inline void remove (Entry *) {
      abort();
    }

  public:

    inline void insert (Entry * e) {
      e->next = head.next;
      head.next = e;
    }

    class Entry {
    public:
      inline Entry (void)
        : next (NULL)
      {}
      //  private:
      //    Entry * prev;
    public:
      Entry * next;
    };

  private:

    Entry head;

  };

}

#endif