///////////////////////////////////////////////////////////////////////////////

// Name:        wx/time.h

// Purpose:     Miscellaneous time-related functions.

// Author:      Vadim Zeitlin

// Created:     2011-11-26

// Copyright:   (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>

// Licence:     wxWindows licence

///////////////////////////////////////////////////////////////////////////////

#ifndef _WX_TIME_H_

#define _WX_TIME_H_

#include "wx/longlong.h"

// Returns the difference between UTC and local time in seconds.

WXDLLIMPEXP_BASE int wxGetTimeZone();

// Get number of seconds since local time 00:00:00 Jan 1st 1970.

extern long WXDLLIMPEXP_BASE wxGetLocalTime();

// Get number of seconds since GMT 00:00:00, Jan 1st 1970.

extern long WXDLLIMPEXP_BASE wxGetUTCTime();

#if wxUSE_LONGLONG

    typedef wxLongLong wxMilliClock_t;

    inline long wxMilliClockToLong(wxLongLong ll) { return ll.ToLong(); }

#else

    typedef double wxMilliClock_t;

    inline long wxMilliClockToLong(double d) { return wx_truncate_cast(long, d); }

#endif // wxUSE_LONGLONG

// Get number of milliseconds since local time 00:00:00 Jan 1st 1970

extern wxMilliClock_t WXDLLIMPEXP_BASE wxGetLocalTimeMillis();

#if wxUSE_LONGLONG

// Get the number of milliseconds or microseconds since the Epoch.

wxLongLong WXDLLIMPEXP_BASE wxGetUTCTimeMillis();

wxLongLong WXDLLIMPEXP_BASE wxGetUTCTimeUSec();

#endif // wxUSE_LONGLONG

#define wxGetCurrentTime() wxGetLocalTime()

// on some really old systems gettimeofday() doesn't have the second argument,

// define wxGetTimeOfDay() to hide this difference

#ifdef HAVE_GETTIMEOFDAY

    #ifdef WX_GETTIMEOFDAY_NO_TZ

        #define wxGetTimeOfDay(tv)      gettimeofday(tv)

    #else

        #define wxGetTimeOfDay(tv)      gettimeofday((tv), nullptr)

    #endif

#endif // HAVE_GETTIMEOFDAY

/* Two wrapper functions for thread safety */

#ifdef HAVE_LOCALTIME_R

#define wxLocaltime_r localtime_r

#else

WXDLLIMPEXP_BASE struct tm *wxLocaltime_r(const time_t*, struct tm*);

#if wxUSE_THREADS && !defined(__WINDOWS__)

     // On Windows, localtime _is_ threadsafe!

#warning using pseudo thread-safe wrapper for localtime to emulate localtime_r

#endif

#endif

#ifdef HAVE_GMTIME_R

#define wxGmtime_r gmtime_r

#else

WXDLLIMPEXP_BASE struct tm *wxGmtime_r(const time_t*, struct tm*);

#if wxUSE_THREADS && !defined(__WINDOWS__)

     // On Windows, gmtime _is_ threadsafe!

#warning using pseudo thread-safe wrapper for gmtime to emulate gmtime_r

#endif

#endif

#endif // _WX_TIME_H_