- CommImplPtr iprobe(int type, int (*match_fun)(void*, void*, CommImpl*), void* data);
- CommImplPtr find_matching_comm(CommImpl::Type type, int (*match_fun)(void*, void*, CommImpl*), void* this_user_data,
+ CommImplPtr iprobe(int type, bool (*match_fun)(void*, void*, CommImpl*), void* data);
+ CommImplPtr find_matching_comm(CommImpl::Type type, bool (*match_fun)(void*, void*, CommImpl*), void* this_user_data,