Function InCoreMemory

util/system/mincore.cpp:16–33

#endif

void InCoreMemory(const void* addr, size_t len, unsigned char* vec, size_t vecLen) {
#if defined(_linux_)
    const size_t pageSize = NSystemInfo::GetPageSize();
    void* maddr = const_cast<void*>(AlignDown(addr, pageSize));
    len = AlignUp(len, pageSize);
    if (vecLen * pageSize < len) {
        ythrow yexception() << "vector argument for mincore is too small: " << vecLen * pageSize << " < " << len;
    }
    if (::mincore(maddr, len, vec)) {
        ythrow yexception() << LastSystemErrorText();
    }
#else
    // pessimistic assumption: nothing is in core
    Y_UNUSED(addr);
    Y_UNUSED(len);
    ::memset(vec, 0, vecLen);
#endif
}