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/**
* @file
*
* @brief Returns the system uptime in seconds.
* @ingroup ClassicClock Clocks
*/
/*
* Copyright (c) 2013 Chris Johns <chrisj@rtems.org>. All rights reserved.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/rtems/clock.h>
#include <rtems/score/todimpl.h>
uint64_t rtems_clock_get_uptime_nanoseconds( void )
{
Timestamp_Control snapshot_as_timestamp;
uint32_t nanoseconds;
ISR_lock_Context lock_context;
_TOD_Acquire( &_TOD, &lock_context );
snapshot_as_timestamp = _TOD.uptime;
nanoseconds = ( *_TOD.nanoseconds_since_last_tick )();
_TOD_Release( &_TOD, &lock_context );
return _Timestamp_Get_As_nanoseconds( &snapshot_as_timestamp, nanoseconds );
}
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