int main()
{
int status, size;
HNDLE hDB, hKey;
/* connect to experiment */
status = cm_connect_experiment("", "", "ODBTest", NULL);
if (status != CM_SUCCESS)
return 1;
/* get handle to online database */
cm_get_experiment_database(&hDB, &hKey);
/* read key "runinfo/run number" */
size = sizeof(run_number);
status =
db_get_value(hDB, 0, "/runinfo/run number", &run_number, &size, TID_INT, TRUE);
if (status != DB_SUCCESS) {
printf("Cannot read run number");
return 0;
}
printf("Current run number is %d\n", run_number);
/* set new run number */
run_number++;
db_set_value(hDB, 0, "/runinfo/run number", &run_number, size, 1, TID_INT);
/* now open run_number with automatic updates */
db_find_key(hDB, 0, "/runinfo/run number", &hKey);
db_open_record(hDB, hKey, &run_number, sizeof(run_number),
MODE_READ, run_number_changed, NULL);
printf("Waiting for run number to change. Hit RETURN to abort\n");
do {
cm_yield(1000);
} while (!ss_kbhit());
db_close_record(hDB, hKey);
/* disconnect from experiment */
cm_disconnect_experiment();
return 1;
}
/*!
* <p>Closes the hot-link, i.e. disconnects the tight link between the local
* structure and the ODB.
*
* <p><b>Return:</b>
* - DB_SUCCESS on successful completion.
* - DB_INVALID_HANDLE if ODB or key is invalid.
*/
INT PKey::Unlink()
{
return db_close_record(fHDB, fHKey);
}
