Function munmap

cpp/src/arrow/io/mman.h:128–134

}

static inline int munmap(void* addr, size_t len) {
  if (UnmapViewOfFile(addr)) return 0;

  errno = __map_mman_error(GetLastError(), EPERM);

  return -1;
}

static inline int mprotect(void* addr, size_t len, int prot) {
  DWORD newProtect = __map_mmap_prot_page(prot);