READ_DATA_PENDING_COUNT 621 io.c           	long i = READ_DATA_PENDING_COUNT(f);
READ_DATA_PENDING_COUNT 624 io.c           	    i = READ_DATA_PENDING_COUNT(f);
READ_DATA_PENDING_COUNT 792 io.c           	long pending = READ_DATA_PENDING_COUNT(f);
READ_DATA_PENDING_COUNT 879 io.c           	while ((cnt = READ_DATA_PENDING_COUNT(f)) > 0) {