Query page protection under POSIX or linux

Question

Is it possible to query the protections on a particular page? E.g. something like

void *page = mmap(NULL, 4096, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
assert(queryProtection(page) & PROT_READ);
assert(!(queryProtection(page) & PROT_WRITE));