The pblock_free function frees a specified pblock and any entries inside it. If you want to save a variable in the pblock, remove the variable using the function pblock_remove and save the resulting pointer.
void pblock_free(pblock *pb);
void
pblock *pb is the pblock to be freed.
pblock_copy, pblock_create, pblock_dup, pblock_find, pblock_findval, pblock_nvinsert, pblock_remove