Function MapSharedMemory

Kernel/src/sharedmem.cpp:79–115

    }

    void* MapSharedMemory(int64_t key, process_t* proc, uint64_t hint){
        acquireLock(&lock);

        shared_mem_t* sMem = GetSharedMemory(key);

        if(!sMem) {
            releaseLock(&lock);
            return nullptr; // Check for invalid key
        }

        if(sMem->flags & SMEM_FLAGS_PRIVATE){ // Private Mapping
            if(proc->pid != sMem->owner && proc->pid != sMem->recipient){
                releaseLock(&lock);
                return nullptr; // Does not have access rights
            }
        }
        sMem->mapCount++;

        void* mapping;
        
        /*if(hint && Memory::CheckRegion(hint, sMem->pgCount * PAGE_SIZE_4K, proc->addressSpace)){
            mapping = (void*)hint;
        } else*/ mapping = Memory::Allocate4KPages(sMem->pgCount, proc->addressSpace);

        for(unsigned i = 0; i < sMem->pgCount; i++){
            Memory::MapVirtualMemory4K(sMem->pages[i], (uintptr_t)mapping + i * PAGE_SIZE_4K, 1, proc->addressSpace);
        }

        mem_region_t mReg;
        mReg.base = (uintptr_t)mapping;
        mReg.pageCount = sMem->pgCount;
        proc->sharedMemory.add_back(mReg);
        
        releaseLock(&lock);

        return mapping;
    }

    void DestroySharedMemory(int64_t key){
        //acquireLock(&lock);