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// -*- C++ -*-
//=============================================================================
/**
* @file Time_Utilities.h
*
* $Id$
*
* @author David Levine <levine@cs.wustl.edu>
*/
//=============================================================================
#ifndef ORBSVCS_TIME_UTILITIES_H
#define ORBSVCS_TIME_UTILITIES_H
#include /**/ "ace/pre.h"
#include "orbsvcs/TimeBaseC.h"
#include "orbsvcs/svc_utils_export.h"
#include "ace/OS_NS_time.h"
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
/**
* @class ORBSVCS_Time
*
* @brief Time conversion utilities.
*
* This class defines several static methods to convert between
* several ACE time structures and the CORBA TimeT structure.
*
* Recall that TimeBase::TimeT stores time in a 64-bit long long
* (or structure when that is not available) and uses hundreds of
* nanoseconds as time units (i.e. 1 second is 10^7 TimeT units).
*
* To convert between the CORBA and the UNIX epochs, we need to adjust
* absolute times by the difference between October 15th, 1582 (Julian
* Date 2299160.5) and January 1st, 1970 (Julian Date 2440578.5):
* 141418.0 days.
*/
class TAO_Svc_Utils_Export ORBSVCS_Time
{
public:
/// @brief A helper constant, IDL does not have constant for structures.
static TimeBase::TimeT zero ();
/**
* @name ACE_hrtime_t conversion routines
*/
//@{
// We interpret an ACE_hrtime_t as nanoseconds.
/// @brief Convert relative high-resolution time to a <TimeBase::TimeT>.
static void hrtime_to_TimeT (TimeBase::TimeT &lhs,
ACE_hrtime_t rhs);
/// @brief Convert relative <TimeBase::TimeT> to a high-resolution time.
static void TimeT_to_hrtime (ACE_hrtime_t &lhs,
const TimeBase::TimeT &rhs);
/// @brief Convert relative <TimeBase::TimeT> to a high-resolution time.
static ACE_hrtime_t to_hrtime (const TimeBase::TimeT &t);
//@}
/**
* @name ACE_Time_Value conversion routines
*/
//@{
// Recall that <ACE_Time_Value>s are <seconds, useconds> pairs.
/// @brief Convert relative <ACE_Time_Value> to a <TimeBase::TimeT>.
static void Time_Value_to_TimeT (TimeBase::TimeT& lhs,
const ACE_Time_Value& rhs);
/// @brief Convert relative <TimeBase::TimeT> to a <ACE_Time_Value>.
static void TimeT_to_Time_Value (ACE_Time_Value& lrs,
const TimeBase::TimeT& rhs);
/// @brief Convert relative <TimeBase::TimeT> to a <ACE_Time_Value>.
static ACE_Time_Value to_Time_Value (const TimeBase::TimeT &rhs);
/// @brief Convert absolute <ACE_Time_Value> to a <TimeBase::TimeT>
static void Absolute_Time_Value_to_TimeT (TimeBase::TimeT& lhs,
const ACE_Time_Value& rhs);
/// @brief Convert absolute <TimeBase::TimeT> to a <ACE_Time_Value>
static void Absolute_TimeT_to_Time_Value (ACE_Time_Value& lrs,
const TimeBase::TimeT& rhs);
/// @brief Convert absolute <TimeBase::TimeT> to a <ACE_Time_Value>.
static ACE_Time_Value to_Absolute_Time_Value (const TimeBase::TimeT &rhs);
//@}
private:
/// @brief Number of nanoseconds between the CORBA and UNIX epochs.
static const ACE_UINT64 Time_Base_Offset;
};
TAO_END_VERSIONED_NAMESPACE_DECL
#if defined (__ACE_INLINE__)
#include "orbsvcs/Time_Utilities.inl"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* ORBSVCS_TIME_UTILITIES_H */
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