/*
* Copyright (c) 2000-2018 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
*/
/*
* Mach Operating System
* Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
#include <mach/kern_return.h>
#include <mach/port.h>
#include <kern/queue.h>
#include <kern/processor.h>
#include <kern/thread.h>
#include <kern/sched_prim.h>
#include <kern/timer.h>
#include <machine/config.h>
void
timer_init(timer_t timer)
{
memset(timer, 0, sizeof(*timer));
}
static void
timer_advance(timer_t timer, uint64_t delta)
{
#if defined(__LP64__)
timer->all_bits += delta;
#else /* defined(__LP64__) */
extern void timer_advance_internal_32(timer_t timer, uint32_t high,
uint32_t low);
uint64_t low = delta + timer->low_bits;
if (low >> 32) {
timer_advance_internal_32(timer,
(uint32_t)(timer->high_bits + (low >> 32)), (uint32_t)low);
} else {
timer->low_bits = (uint32_t)low;
}
#endif /* defined(__LP64__) */
}
void
timer_start(timer_t timer, uint64_t tstamp)
{
timer->tstamp = tstamp;
}
void
timer_stop(timer_t timer, uint64_t tstamp)
{
timer_advance(timer, tstamp - timer->tstamp);
}
void
timer_update(timer_t timer, uint64_t tstamp)
{
timer_advance(timer, tstamp - timer->tstamp);
timer->tstamp = tstamp;
}