wxWidgets/interface/wx/time.h

/////////////////////////////////////////////////////////////////////////////
// Name:        wx/time.h
// Purpose:     Time-related functions.
// Author:      Vadim Zeitlin
// Created:     2011-11-27
// Copyright:   (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

/** @addtogroup group_funcmacro_time */
///@{

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

    This function intentionally doesn't take DST into account, i.e. the offset
    returned is the same one independently of when the function is called.

    @header{wx/time.h}
 */
int wxGetTimeZone();

/**
    Returns the number of seconds since local time 00:00:00 Jan 1st 1970.

    @see wxDateTime::Now()

    @header{wx/time.h}
*/
long wxGetLocalTime();

/**
    Returns the number of milliseconds since local time 00:00:00 Jan 1st 1970.

    The use of wxGetUTCTimeMillis() is preferred as it provides a usually
    (except for changes to the system time) monotonic clock which the local
    time also changes whenever DST begins or ends.

    @see wxDateTime::Now(), wxGetUTCTimeMillis(), wxGetUTCTimeUSec()

    @header{wx/time.h}
*/
wxLongLong wxGetLocalTimeMillis();

/**
    Returns the number of seconds since GMT 00:00:00 Jan 1st 1970.

    @see wxDateTime::Now()

    @header{wx/time.h}
*/
long wxGetUTCTime();

/**
    Returns the number of milliseconds since GMT 00:00:00 Jan 1st 1970.

    @header{wx/time.h}

    @since 2.9.3
 */
wxLongLong wxGetUTCTimeMillis();

/**
    Returns the number of microseconds since GMT 00:00:00 Jan 1st 1970.

    @header{wx/time.h}

    @since 2.9.3
 */
wxLongLong wxGetUTCTimeUSec();

///@}