windows-xp/Source/XPSP1/NT/base/hals/halx86/i386/xxtime.c

/*++

Copyright (c) 1991  Microsoft Corporation

Module Name:

    xxtime.c

Abstract:

    This module implements the HAL set/query realtime clock routines for
    an x86 system.

Author:

    David N. Cutler (davec) 5-May-1991

Environment:

    Kernel mode

Revision History:

--*/

#include "halp.h"

BOOLEAN
HalQueryRealTimeClock (
    OUT PTIME_FIELDS TimeFields
    )

/*++

Routine Description:

    This routine queries the realtime clock.

    N.B. This routine assumes that the caller has provided any required
        synchronization to query the realtime clock information.

Arguments:

    TimeFields - Supplies a pointer to a time structure that receives
        the realtime clock information.

Return Value:

    If the power to the realtime clock has not failed, then the time
    values are read from the realtime clock and a value of TRUE is
    returned. Otherwise, a value of FALSE is returned.

--*/

{

    HalpReadCmosTime(TimeFields);
    return TRUE;
}

BOOLEAN
HalSetRealTimeClock (
    IN PTIME_FIELDS TimeFields
    )

/*++

Routine Description:

    This routine sets the realtime clock.

    N.B. This routine assumes that the caller has provided any required
        synchronization to set the realtime clock information.

Arguments:

    TimeFields - Supplies a pointer to a time structure that specifies the
        realtime clock information.

Return Value:

    If the power to the realtime clock has not failed, then the time
    values are written to the realtime clock and a value of TRUE is
    returned. Otherwise, a value of FALSE is returned.

--*/

{
    HalpWriteCmosTime(TimeFields);
    return TRUE;
}