/********************************************************************************
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* Copyright: (C) 2020 LingYun IoT System Studio
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* All rights reserved.
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*
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* Filename: util.h
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* Description: This file is common utility functions
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*
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* Version: 1.0.0(7/06/2012~)
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* Author: Guo Wenxue <guowenxue@gmail.com>
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* ChangeLog: 1, Release initial version on "7/06/2012 09:21:33 PM"
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*
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********************************************************************************/
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#ifndef __UTIL_H_
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#define __UTIL_H_
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#include <time.h>
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#include <stddef.h>
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#define container_of(ptr, type, member) ((type *)((char *)(ptr) - offsetof(type, member)))
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/* +------------------------+
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* | time functions API |
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* +------------------------+*/
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static inline void msleep(unsigned long ms)
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{
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struct timespec cSleep;
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unsigned long ulTmp;
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cSleep.tv_sec = ms / 1000;
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if (cSleep.tv_sec == 0)
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{
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ulTmp = ms * 10000;
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cSleep.tv_nsec = ulTmp * 100;
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}
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else
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{
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cSleep.tv_nsec = 0;
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}
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nanosleep(&cSleep, 0);
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return ;
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}
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static inline int check_timeout(time_t *last_time, int interval)
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{
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int timeout = 0;
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time_t now;
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time(&now);
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if( difftime(now, *last_time)>interval )
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{
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timeout = 1;
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*last_time = now;
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}
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return timeout;
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}
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#endif
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