/**
 * 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 p3dConditionVar.h
 * @author drose
 * @date 2009-07-02
 */

#ifndef P3DCONDITIONVAR_H
#define P3DCONDITIONVAR_H

#include "p3d_plugin_common.h"

/**
 * A simple condition-variable like object.  It doesn't support the full
 * condition-var semantics, but it works well enough with one waiter and one
 * signaller.
 */
class P3DConditionVar {
public:
  P3DConditionVar();
  ~P3DConditionVar();

  void acquire();
  void wait();
  void wait(double timeout);
  void notify();
  void release();

private:
#ifdef _WIN32
  CRITICAL_SECTION _lock;
  HANDLE _event_signal;

#else  // _WIN32
  pthread_mutex_t _lock;
  pthread_cond_t _cvar;
#endif  // _WIN32
};

#include "p3dConditionVar.I"

#endif