58 lines
1.1 KiB
C
58 lines
1.1 KiB
C
/**
|
|
* \file
|
|
* \brief System time
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2016, ETH Zurich.
|
|
* All rights reserved.
|
|
*
|
|
* This file is distributed under the terms in the attached LICENSE file.
|
|
* If you do not find this file, copies can be found by writing to:
|
|
* ETH Zurich D-INFK, CAB F.78, Universitaetstr. 6, CH-8092 Zurich,
|
|
* Attn: Systems Group.
|
|
*/
|
|
|
|
#ifndef BARRELFISH_SYSTIME_H
|
|
#define BARRELFISH_SYSTIME_H
|
|
|
|
#include <barrelfish_kpi/types.h> /* systime_t */
|
|
#include <barrelfish_kpi/generic_arch.h>
|
|
|
|
__BEGIN_DECLS
|
|
|
|
/// Frequency of the system time ticks (systime)
|
|
extern systime_t systime_frequency;
|
|
|
|
/**
|
|
* Get the current system time from a hardware clock
|
|
*/
|
|
static inline systime_t systime_now(void)
|
|
{
|
|
return rdtsc();
|
|
}
|
|
|
|
/**
|
|
* Convert nanoseconds to a system time ticks
|
|
*/
|
|
systime_t ns_to_systime(uint64_t nanoseconds);
|
|
|
|
/**
|
|
* Convert microseconds to a system time ticks
|
|
*/
|
|
systime_t us_to_systime(uint64_t microseconds);
|
|
|
|
/**
|
|
* Convert a system time ticks to nanoseconds
|
|
*/
|
|
uint64_t systime_to_ns(systime_t time);
|
|
|
|
/**
|
|
* Convert a system time ticks to microseconds
|
|
*/
|
|
uint64_t systime_to_us(systime_t time);
|
|
|
|
__END_DECLS
|
|
|
|
#endif // BARRELFISH_SYSTIME_H
|