I just encountered a problem with a C function I've been working on where it broke with the error: could not find block containing chunk ... I tracked the problem down to my use of pfree. Apparently my function was not happy attempting to return a result that was built using values that had been pfree'd. Commenting out the indicated section solved my problem. I understand that one of the advantages of palloc is that allocated memory is automatically returned at some point. My question is, when does it make sense to call pfree? I wouldn't have expected the variables I free'd below to still be needed, but apparently they were. So now I'm feeling a little intimidated about using pfree at all. Should I just save a little wear and tear on my keyboard and forgo the use of pfree altogether? aim = TupleDescGetAttInMetadata( td ); ht = BuildTupleFromCStrings( aim, vals); /* make the tuple into a datum */ result = HeapTupleGetDatum( ht ); ... // pfree( rd ); // pfree( vals[0] ); // pfree( vals[1] ); // pfree( vals[2] ); // pfree( vals ); PG_RETURN_DATUM( result ); TIA -- Ron Peterson https://www.yellowbank.com/
