2019-07-28 10:31:56 +08:00
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/**
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2015-12-19 12:08:14 +08:00
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* \file timing.h
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*
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* \brief Portable interface to the CPU cycle counter
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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*
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* This file is part of mbed TLS (https://polarssl.org)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef POLARSSL_TIMING_H
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#define POLARSSL_TIMING_H
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/**
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* \brief timer structure
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*/
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struct hr_time
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{
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unsigned char opaque[32];
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};
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern volatile int alarmed;
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/**
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* \brief Return the CPU cycle counter value
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*/
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unsigned long hardclock( void );
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/**
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* \brief Return the elapsed time in milliseconds
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*
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* \param val points to a timer structure
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* \param reset if set to 1, the timer is restarted
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*/
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unsigned long get_timer( struct hr_time *val, int reset );
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/**
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* \brief Setup an alarm clock
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*
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* \param seconds delay before the "alarmed" flag is set
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*
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* \warning Only one alarm at a time is supported. In a threaded
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* context, this means one for the whole process, not one per
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* thread.
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*/
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void set_alarm( int seconds );
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/**
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* \brief Sleep for a certain amount of time
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*
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* \param milliseconds delay in milliseconds
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*/
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void m_sleep( int milliseconds );
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#ifdef __cplusplus
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}
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#endif
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#endif /* timing.h */
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