发现使用clock_nanosleep函数产生2ms的睡眠时间有困难

Question

谢谢...我正在使用 posix precision sleep 标准库函数来睡眠，但它似乎返回得太快了。请检查此代码并提供修复该功能以正确睡眠正确时间的方法的详细信息。我需要至少 2 毫秒的睡眠时间。

void CModbusSlave::sleep(uint32_t seconds, uint32_t useconds)//arguments passed int32_t seconds=0,uint32_t useconds=2000ULL//
{
    int timerResult = 0;
   clock_gettime(CLOCK_MONOTONIC, &stopTime);

    uint64_t absTime = (((static_cast<uint64_t>(stopTime.tv_sec) * 1000000000ULL) +
                         (static_cast<uint64_t>(stopTime.tv_nsec))) +
                        ((static_cast<uint64_t>(seconds) * 1000000000ULL) +
                         (static_cast<uint64_t>(useconds)*1000ULL)));
    stopTime.tv_sec = static_cast<uint32_t>(absTime / 1000000000ULL);
    stopTime.tv_nsec = static_cast<uint32_t>(absTime % 1000000000ULL);

    do
    {
        timerResult = clock_nanosleep(CLOCK_MONOTONIC,
                                      TIMER_ABSTIME,
                                      &stopTime,
                                      &stopTime);
        sched_yield();
    }
    while ((timerResult == -1) && (errno == EINTR));
}