threadSafePointerToBase.h

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/**
 * PANDA 3D SOFTWARE
 * Copyright (c) Carnegie Mellon University.  All rights reserved.
 *
 * All use of this software is subject to the terms of the revised BSD
 * license.  You should have received a copy of this license along
 * with this source code in a file named "LICENSE."
 *
 * @file threadSafePointerToBase.h
 * @author drose
 * @date 2006-04-28
 */
 
#ifndef THREADSAFEPOINTERTOBASE_H
#define THREADSAFEPOINTERTOBASE_H
 
#include "pandabase.h"
#include "pointerToVoid.h"
#include "referenceCount.h"
#include "typedef.h"
#include "memoryUsage.h"
#include "config_express.h"
#include "atomicAdjust.h"
 
/**
 * This is the base class for ThreadSafePointerTo and
 * ThreadSafeConstPointerTo.  Don't try to use it directly; use either derived
 * class instead.
 */
template <class T>
class ThreadSafePointerToBase : public PointerToVoid {
public:
  typedef T To;
 
protected:
  INLINE ThreadSafePointerToBase(To *ptr);
  INLINE ThreadSafePointerToBase(const ThreadSafePointerToBase<T> &copy);
  INLINE ~ThreadSafePointerToBase();
 
  INLINE void reassign(To *ptr);
  INLINE void reassign(const ThreadSafePointerToBase<To> &copy);
 
  void update_type(To *ptr);
 
  // No assignment or retrieval functions are declared in
  // ThreadSafePointerToBase, because we will have to specialize on const vs.
  // non-const later.
 
PUBLISHED:
  INLINE void clear();
 
  void output(std::ostream &out) const;
};
 
template<class T>
INLINE std::ostream &operator <<(std::ostream &out, const ThreadSafePointerToBase<T> &pointer) {
  pointer.output(out);
  return out;
}
 
#include "threadSafePointerToBase.I"
 
#endif