Method lockReadOnlyMemory

source/kernel/kmemory.cpp:661–679

This doesn't mean the data can't be changed by another thread, it just means the pointer will stay valid

// This doesn't mean the data can't be changed by another thread, it just means the pointer will stay valid
U8* KMemory::lockReadOnlyMemory(U32 address, U32 len) {
    U32 pageIndex = address >> K_PAGE_SHIFT;
    Page* page = data->getPage(pageIndex);
    U32 offset = address & K_PAGE_MASK;

    // if we cross a page boundry then we will need to make a copy
    if (len <= K_PAGE_SIZE - offset) {
        return page->getRamPtr(&data->mmu[pageIndex], pageIndex, false, true, offset, len);
    }
    std::shared_ptr<LockedMemory> p = std::make_shared<LockedMemory>();
    p->p = new U8[len];
    p->len = len;
    p->address = address;
    p->readOnly = true;
    memcpy(p->p, address, len);
    BOXEDWINE_CRITICAL_SECTION_WITH_MUTEX(lockedMemoryMutex);
    lockedMemory.set(p->p, p);
    return p->p;
}

void KMemory::unlockMemory(U8* lockedPointer) {
    BOXEDWINE_CRITICAL_SECTION_WITH_MUTEX(lockedMemoryMutex);