106 lines
3.4 KiB
C
106 lines
3.4 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 is an extension 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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#ifndef __PT_EXT_H__
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#define __PT_EXT_H__
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#include "pt.h"
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#include "limits.h"
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#define PT_WAIT_STAT_SUCC (0 )
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#define PT_WAIT_STAT_TIMEOUT (-2)
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/**
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* \addtogroup pt
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* @{
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*/
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/**
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* Increment the system tick counter.
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*
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* This macro increments the global tick counter. It should be called
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* from a system tick interrupt or similar context.
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*/
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void pt_ticks_inc(void);
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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 pt_ticks_get(void);
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/**
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* Delay for a specified number of milliseconds.
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*
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* This macro blocks the protothread for the specified number of
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* milliseconds. The delay is implemented using the global tick counter.
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*
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* \param pt A pointer to the protothread control structure.
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* \param ms The number of milliseconds to delay.
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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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* \param start The start tick count
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* \param end The end tick count
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* \param timeout The timeout value in ticks
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* \return 1 if timeout occurred, 0 otherwise
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*/
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int pt_is_timeout(unsigned int start, unsigned int end, unsigned int timeout);
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#define PT_DELAY_MS(pt, ms) \
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do { \
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static unsigned int _pt_delay_start=0; \
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_pt_delay_start = pt_ticks_get(); \
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PT_WAIT_UNTIL((pt), pt_is_timeout(_pt_delay_start, pt_ticks_get(), ms)); \
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} while (0)
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#define PT_WAIT(pt, c, timeout, result) \
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do { \
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static unsigned int _pt_wait_start = 0;\
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_pt_wait_start = pt_ticks_get(); \
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*result = -1; \
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PT_WAIT_UNTIL((pt), (c) || pt_is_timeout(_pt_wait_start, pt_ticks_get(), timeout)); \
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if (c) { *result = 0; };\
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if (pt_is_timeout(_pt_wait_start, pt_ticks_get(), timeout)) { *result = -2;};\
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}while (0)
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/** @} */
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/** @} */
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#endif /* __PT_EXT_H__ */
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