forked from KolibriOS/kolibrios
102 lines
2.4 KiB
C
102 lines
2.4 KiB
C
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/**************************************************************************
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*
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* Copyright 2008-2010 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/**
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* @file
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* OS independent time-manipulation functions.
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*
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* @author Jose Fonseca <jfonseca@vmware.com>
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*/
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#ifndef _OS_TIME_H_
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#define _OS_TIME_H_
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#include "pipe/p_config.h"
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#if defined(PIPE_OS_UNIX)
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# include <unistd.h> /* usleep */
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#endif
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#include "pipe/p_compiler.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Get the current time in nanoseconds from an unknown base.
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*/
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int64_t
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os_time_get_nano(void);
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/*
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* Get the current time in microseconds from an unknown base.
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*/
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static INLINE int64_t
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os_time_get(void) {
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return os_time_get_nano() / 1000;
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}
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/*
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* Sleep.
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*/
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#if defined(PIPE_OS_UNIX)
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#define os_time_sleep(_usecs) usleep(_usecs)
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#else
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void
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os_time_sleep(int64_t usecs);
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#endif
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/*
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* Helper function for detecting time outs, taking in account overflow.
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*
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* Returns true if the current time has elapsed beyond the specified interval.
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*/
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static INLINE boolean
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os_time_timeout(int64_t start,
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int64_t end,
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int64_t curr)
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{
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if(start <= end)
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return !(start <= curr && curr < end);
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else
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return !((start <= curr) || (curr < end));
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* _OS_TIME_H_ */
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