Method preadv_mutable

fs/aligned-file.cpp:141–143

            return this->preadv_mutable(iovec.iovec(), iovec.iovcnt(), offset);
        }
        virtual ssize_t preadv_mutable(struct iovec *iov, int iovcnt, off_t offset) override {
            return this->preadv2_mutable(iov, iovcnt, offset, 0);
        }
        virtual ssize_t preadv2(const struct iovec *iov, int iovcnt, off_t offset, int flags) override {
            IOVector iovec(iov, iovcnt);
            return this->preadv2_mutable(iovec.iovec(), iovec.iovcnt(), offset, flags);