51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
/**
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* \file
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* \brief System time
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*/
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/*
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* Copyright (c) 2016, ETH Zurich.
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* All rights reserved.
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*
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* This file is distributed under the terms in the attached LICENSE file.
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* If you do not find this file, copies can be found by writing to:
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* ETH Zurich D-INFK, Universitaetstrasse 6, CH-8092 Zurich. Attn: Systems Group.
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*/
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#ifndef __SYSTIME_H
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#define __SYSTIME_H
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#include <barrelfish_kpi/types.h> /* systime_t */
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/// Frequency of the system time ticks (systime)
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extern systime_t systime_frequency;
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/**
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* Get the current system time from a hardware clock
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*/
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systime_t systime_now(void);
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/**
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* Convert nanoseconds to a system time ticks
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*/
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systime_t ns_to_systime(uint64_t nanoseconds);
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/**
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* Convert a system time ticks to nanoseconds
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*/
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uint64_t systime_to_ns(systime_t time);
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/**
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* Set a point at which a timer interrupt should occur
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* if it's in a past, trigger immediately
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*/
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void systime_set_timeout(systime_t absolute_timeout);
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/**
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* Set a timeout at which a timer interrupt should occur, counting from now
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* if it's 0, trigger immediately
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*/
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void systime_set_timer(systime_t relative_timeout);
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#endif // __SYSTIME_H
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