/********************************************************************************
 *      Copyright:  (C) 2020 LingYun IoT System Studio
 *                  All rights reserved.
 *
 *       Filename:  util.h
 *    Description:  This file is common utility functions
 *
 *        Version:  1.0.0(7/06/2012~)
 *         Author:  Guo Wenxue <guowenxue@gmail.com>
 *      ChangeLog:  1, Release initial version on "7/06/2012 09:21:33 PM"
 *
 ********************************************************************************/

#ifndef __UTIL_H_
#define __UTIL_H_

#include <time.h>
#include <stddef.h>

#define container_of(ptr, type, member) ((type *)((char *)(ptr) - offsetof(type, member)))

/* +------------------------+
 * |   time functions API   |
 * +------------------------+*/
static inline void msleep(unsigned long ms)
{
    struct timespec cSleep;
    unsigned long ulTmp;

    cSleep.tv_sec = ms / 1000;
    if (cSleep.tv_sec == 0)
    {
        ulTmp = ms * 10000;
        cSleep.tv_nsec = ulTmp * 100;
    }
    else
    {
        cSleep.tv_nsec = 0;
    }

    nanosleep(&cSleep, 0);
    return ;
}

static inline int check_timeout(time_t *last_time, int interval)
{
    int                  timeout = 0;
    time_t               now;

    time(&now);

    if( difftime(now, *last_time)>interval )
    {
        timeout = 1;
        *last_time = now;
    }

    return timeout;
}

#endif