84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
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/*
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* Copyright (c) 2025, Your Name.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file implements the extensions to the protothreads library.
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*
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* Author: Your Name <your.email@example.com>
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*/
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#include "pt_ext.h"
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/**
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* Global tick counter.
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*
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* This variable is used to track system ticks. It should be incremented
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* by the system tick interrupt or a similar mechanism.
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*/
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volatile unsigned int pt_ticks = 0;
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/**
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* Increment the system tick counter.
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*/
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void
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pt_ticks_inc(void)
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{
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pt_ticks++;
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}
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/**
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* Get the current system tick counter.
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*
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* \return The current tick count.
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*/
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unsigned int
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pt_ticks_get(void)
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{
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return pt_ticks;
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}
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/**
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* Check if timeout has occurred, handling tick counter overflow.
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*/
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int
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pt_is_timeout(unsigned int start, unsigned int end, unsigned int timeout)
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{
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return (end - start) >= timeout ||
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((end < start) && (UINT_MAX - start + end + 1) >= timeout);
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}
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/**
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* Initialize the protothreads extensions.
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*
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* This function resets the global tick counter to zero.
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*/
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void
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pt_ext_init(void)
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{
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pt_ticks = 0;
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}
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