c++ - 是否有任何实现或如何为 Windows 实现“lockf()”？

Question

我正在将一些 Linux 代码移植到使用lockf()

static string load_bulletin_from_file(const char* cache_filename)
{
    int fd = open(cache_filename, O_RDWR); // lockf requires O_RDWR
    if (fd == -1) {
        etiLog.level(error) << "TAI-UTC bulletin open cache for reading: " <<
            strerror(errno);
        return "";
    }

    lseek(fd, 0, SEEK_SET);

    vector<char> buf(1024);
    vector<char> new_bulletin_data;

    ssize_t ret = lockf(fd, F_LOCK, 0);
    if (ret == 0) {
        // exclusive lock acquired

        do {
            ret = read(fd, buf.data(), buf.size());

            if (ret == -1) {
                close(fd);
                etiLog.level(error) << "TAI-UTC bulletin read cache: " <<
                        strerror(errno);
                return "";
            }

            copy(buf.data(), buf.data() + ret, back_inserter(new_bulletin_data));
        } while (ret > 0);

        close(fd);

        return string{new_bulletin_data.data(), new_bulletin_data.size()};
    }
    else {
        etiLog.level(error) <<
            "TAI-UTC bulletin acquire cache lock for reading: " <<
            strerror(errno);
        close(fd);
    }
    return "";
}

由于lockf()是 POSIX 函数，Windows 没有它，所以我真的不知道是否有替代品或如何将这段代码移植到 Windows。