Question

The user shall be allowed to optionally iterate for the loaded objects in a specific instantiation scope using vpi_iterate(). This shall be accomplished by calling vpi_iterate() with the appropriate reference handle, and using the property vpiDataLoaded. This is shown below.

a) Iterate all data read loaded objects in the design: use a NULL reference handle (ref_h) to

vpi_iterate(), e.g.,
itr = vpi_iterate(vpiDataLoaded, /* ref_h */ NULL);
while (loadedObj = vpi_scan(itr)) {
    /* process loadedObj */
}

b) Iterate all data read loaded objects in an instance: pass the appropriate instance handle as a reference

handle to vpi_iterate(), e.g.,
itr = vpi_iterate(vpiDataLoaded, /* ref_h */ instanceHandle);
while (loadedObj = vpi_scan(itr)) {
    /* process loadedObj */
}