C++ (Cpp) qemu_iovec_from_bufferの例

コード例 #1

ファイル: curl.c プロジェクト: mithleshvrts/qemu-kvm-rhel6

static size_t curl_read_cb(void *ptr, size_t size, size_t nmemb, void *opaque)
{
    CURLState *s = ((CURLState*)opaque);
    size_t realsize = size * nmemb;
    int i;

    DPRINTF("CURL: Just reading %zd bytes\n", realsize);

    if (!s || !s->orig_buf)
        goto read_end;

    memcpy(s->orig_buf + s->buf_off, ptr, realsize);
    s->buf_off += realsize;

    for(i=0; i<CURL_NUM_ACB; i++) {
        CURLAIOCB *acb = s->acb[i];

        if (!acb)
            continue;

        if ((s->buf_off >= acb->end)) {
            qemu_iovec_from_buffer(acb->qiov, s->orig_buf + acb->start,
                                   acb->end - acb->start);
            acb->common.cb(acb->common.opaque, 0);
            qemu_aio_release(acb);
            s->acb[i] = NULL;
        }
    }

read_end:
    return realsize;
}

コード例 #2

ファイル: curl.c プロジェクト: mithleshvrts/qemu-kvm-rhel6

static int curl_find_buf(BDRVCURLState *s, size_t start, size_t len,
                         CURLAIOCB *acb)
{
    int i;
    size_t end = start + len;

    for (i=0; i<CURL_NUM_STATES; i++) {
        CURLState *state = &s->states[i];
        size_t buf_end = (state->buf_start + state->buf_off);
        size_t buf_fend = (state->buf_start + state->buf_len);

        if (!state->orig_buf)
            continue;
        if (!state->buf_off)
            continue;

        // Does the existing buffer cover our section?
        if ((start >= state->buf_start) &&
            (start <= buf_end) &&
            (end >= state->buf_start) &&
            (end <= buf_end))
        {
            char *buf = state->orig_buf + (start - state->buf_start);

            qemu_iovec_from_buffer(acb->qiov, buf, len);
            acb->common.cb(acb->common.opaque, 0);

            return FIND_RET_OK;
        }

        // Wait for unfinished chunks
        if ((start >= state->buf_start) &&
            (start <= buf_fend) &&
            (end >= state->buf_start) &&
            (end <= buf_fend))
        {
            int j;

            acb->start = start - state->buf_start;
            acb->end = acb->start + len;

            for (j=0; j<CURL_NUM_ACB; j++) {
                if (!state->acb[j]) {
                    state->acb[j] = acb;
                    return FIND_RET_WAIT;
                }
            }
        }
    }

    return FIND_RET_NONE;
}

コード例 #3

static void rbd_aio_bh_cb(void *opaque)
{
    RBDAIOCB *acb = opaque;

    if (acb->cmd == RBD_AIO_READ) {
        qemu_iovec_from_buffer(acb->qiov, acb->bounce, acb->qiov->size);
    }
    qemu_vfree(acb->bounce);
    acb->common.cb(acb->common.opaque, (acb->ret > 0 ? 0 : acb->ret));
    qemu_bh_delete(acb->bh);
    acb->bh = NULL;
    acb->status = 0;
    qemu_aio_unref(acb);
}

コード例 #4

ファイル: rbd.c プロジェクト: dorlaor/qemu

static void rbd_aio_bh_cb(void *opaque)
{
    RBDAIOCB *acb = opaque;

    if (!acb->write) {
        qemu_iovec_from_buffer(acb->qiov, acb->bounce, acb->qiov->size);
    }
    qemu_vfree(acb->bounce);
    acb->common.cb(acb->common.opaque, (acb->ret > 0 ? 0 : acb->ret));
    qemu_bh_delete(acb->bh);
    acb->bh = NULL;

    qemu_aio_release(acb);
}