C++ (Cpp) block_job_set_speedの例

コード例 #1

ファイル: blockjob.c プロジェクト: NormanM/qemu

void *block_job_create(const BlockJobType *job_type, BlockDriverState *bs,
                       int64_t speed, BlockDriverCompletionFunc *cb,
                       void *opaque, Error **errp)
{
    BlockJob *job;

    if (bs->job || bdrv_in_use(bs)) {
        error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs));
        return NULL;
    }
    bdrv_set_in_use(bs, 1);

    job = g_malloc0(job_type->instance_size);
    job->job_type      = job_type;
    job->bs            = bs;
    job->cb            = cb;
    job->opaque        = opaque;
    job->busy          = true;
    bs->job = job;

    /* Only set speed when necessary to avoid NotSupported error */
    if (speed != 0) {
        Error *local_err = NULL;

        block_job_set_speed(job, speed, &local_err);
        if (error_is_set(&local_err)) {
            bs->job = NULL;
            g_free(job);
            bdrv_set_in_use(bs, 0);
            error_propagate(errp, local_err);
            return NULL;
        }
    }
    return job;
}

コード例 #2

ファイル: blockjob.c プロジェクト: C2Devel/qemu-kvm

void *block_job_create(const BlockJobDriver *driver, BlockDriverState *bs,
                       int64_t speed, BlockCompletionFunc *cb,
                       void *opaque, Error **errp)
{
    BlockJob *job;

    if (bs->job) {
        error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs));
        return NULL;
    }
    bdrv_ref(bs);
    job = g_malloc0(driver->instance_size);
    error_setg(&job->blocker, "block device is in use by block job: %s",
               BlockJobType_lookup[driver->job_type]);
    bdrv_op_block_all(bs, job->blocker);
    bdrv_op_unblock(bs, BLOCK_OP_TYPE_DATAPLANE, job->blocker);

    job->driver        = driver;
    job->bs            = bs;
    job->cb            = cb;
    job->opaque        = opaque;
    job->busy          = true;
    bs->job = job;

    /* Only set speed when necessary to avoid NotSupported error */
    if (speed != 0) {
        Error *local_err = NULL;

        block_job_set_speed(job, speed, &local_err);
        if (local_err) {
            bs->job = NULL;
            bdrv_op_unblock_all(bs, job->blocker);
            error_free(job->blocker);
            g_free(job);
            error_propagate(errp, local_err);
            return NULL;
        }
    }
    return job;
}