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// -*- C++ -*-
//=============================================================================
/**
* @file Countdown_Time.h
*
* $Id$
*
* @author Douglas C. Schmidt <schmidt@cs.wustl.edu>
*/
//=============================================================================
#ifndef ACE_COUNTDOWN_TIME_H
#define ACE_COUNTDOWN_TIME_H
#include /**/ "ace/pre.h"
#include /**/ "ace/ACE_export.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/Time_Value.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
/**
* @class ACE_Countdown_Time
*
* @brief Keeps track of the amount of elapsed time.
*
* This class has a side-effect on the <max_wait_time> -- every
* time the <stop> method is called the <max_wait_time> is
* updated.
*/
class ACE_Export ACE_Countdown_Time
{
public:
// = Initialization and termination methods.
/// Cache the <max_wait_time> and call <start>.
ACE_Countdown_Time (ACE_Time_Value *max_wait_time);
/// Call <stop>.
~ACE_Countdown_Time (void);
/// Cache the current time and enter a start state.
int start (void);
/// Subtract the elapsed time from max_wait_time_ and enter a stopped
/// state.
int stop (void);
/// Calls stop and then start. max_wait_time_ is modified by the
/// call to stop.
int update (void);
/// Returns 1 if we've already been stopped, else 0.
int stopped (void) const;
private:
/// Maximum time we were willing to wait.
ACE_Time_Value *max_wait_time_;
/// Beginning of the start time.
ACE_Time_Value start_time_;
/// Keeps track of whether we've already been stopped.
int stopped_;
// Prevent copying
ACE_Countdown_Time (const ACE_Countdown_Time &);
ACE_Countdown_Time &operator= (const ACE_Countdown_Time &);
};
ACE_END_VERSIONED_NAMESPACE_DECL
#include /**/ "ace/post.h"
#endif /* ACE_COUNTDOWN_TIME_H */
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