timediffc.nc

来自「tinyos-2.x.rar」· NC 代码 · 共 65 行

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/**
 * Implementation of timediff interface
 * @author: Andreas Koepke ([e-mail])
 */

module TimeDiffC {
    provides {
        interface TimeDiff32;
        interface TimeDiff16;
    }
}
implementation {
    async command uint32_t TimeDiff32.computeDelta(uint32_t time_now, uint32_t time_past) {
        uint32_t rval;
        if(time_now >= time_past) {
            rval = time_now - time_past;
        }
        else {
            rval = (uint32_t)(-1) - time_past + time_now;
        }
        return rval;
    }

    async command uint16_t TimeDiff16.computeDelta(uint16_t time_now, uint16_t time_past) {
        uint16_t rval;
        if(time_now >= time_past) {
            rval = time_now - time_past;
        }
        else {
            rval = (uint16_t)(-1) - time_past + time_now;
        }
        return rval;
    }
}