static gint
gda_thread_recordset_fetch_nb_rows (GdaDataSelect *model)
{
GdaThreadRecordset *rs = (GdaThreadRecordset*) model;
gint nb;
gint *res;
guint jid;
jid = gda_thread_wrapper_execute (rs->priv->wrapper,
(GdaThreadWrapperFunc) sub_thread_fetch_nb_rows,
rs->priv->sub_model, NULL, NULL);
res = (gint*) gda_thread_wrapper_fetch_result (rs->priv->wrapper, TRUE, jid, NULL);
nb = *res;
g_free (res);
COPY_PUBLIC_DATA (rs->priv->sub_model, rs);
return nb;
}
static gboolean
gda_thread_recordset_fetch_at (GdaDataSelect *model, GdaRow **prow, gint rownum, GError **error)
{
GdaThreadRecordset *rs = (GdaThreadRecordset*) model;
ThreadData wdata;
gboolean retval;
guint jid;
wdata.select = (GdaDataSelect *) rs->priv->sub_model;
wdata.rownum = rownum;
wdata.row = prow;
jid = gda_thread_wrapper_execute (rs->priv->wrapper,
(GdaThreadWrapperFunc) sub_thread_fetch_at,
&wdata, NULL, NULL);
retval = GPOINTER_TO_INT (gda_thread_wrapper_fetch_result (rs->priv->wrapper, TRUE, jid, error)) ?
TRUE : FALSE;
COPY_PUBLIC_DATA (rs->priv->sub_model, rs);
if (*prow && rs->priv->blobs_conv)
alter_blob_values (rs, prow);
return retval;
}
int
main (int argc, char *argv[])
{
GdaConnection* connection;
GdaDataModel* data;
GError* error = NULL;
GValue *value;
gda_init();
error = NULL;
/* open connection to the SalesTest data source, using the GDA_CONNECTION_OPTIONS_THREAD_SAFE flag
* to make sure we can use the same connection from multiple threads at once */
connection = gda_connection_open_from_dsn ("SalesTest", NULL, GDA_CONNECTION_OPTIONS_THREAD_SAFE, &error);
if (!connection) {
fprintf (stderr, "%s\n", error->message);
return -1;
}
/* update meta data */
GdaThreadWrapper *wrapper;
guint job_id;
g_print ("Requesting a meta data update in the background.\n");
wrapper = gda_thread_wrapper_new ();
job_id = gda_thread_wrapper_execute (wrapper, (GdaThreadWrapperFunc) sub_thread_update_meta_store,
connection, NULL, &error);
if (job_id == 0) {
fprintf (stderr, "Can't use thread wrapper: %s\n", error->message);
return -1;
}
while (1) {
gboolean *result;
g_print ("Doing some business here...\n");
g_usleep (100000);
result = (gboolean *) gda_thread_wrapper_fetch_result (wrapper, FALSE, job_id, &error);
if (result) {
gboolean meta_ok;
g_object_unref (wrapper);
meta_ok = *result;
g_free (result);
if (!meta_ok) {
fprintf (stderr, "Could not update meta data: %s\n", error->message);
return -1;
}
g_print ("Meta data has been updated!\n");
break;
}
}
/*
* Get columns of the 'products' table
*/
g_value_set_string ((value = gda_value_new (G_TYPE_STRING)), "products");
data = gda_connection_get_meta_store_data (connection, GDA_CONNECTION_META_FIELDS, &error, 1,
"name", value);
if (!data)
return -1;
list_table_columns (data);
g_object_unref (data);
return 0;
}