Method computeAlignedAddress

src/memory/HeapAllocator.cpp:193–212

Return the next aligned memory address

// Return the next aligned memory address
void* HeapAllocator::computeAlignedAddress(void* unalignedAddress) {

    // Take care of alignment to make sure that we always return an address to the
    // enforce the global alignment of the library

    // Compute the aligned address
    ptrdiff_t alignmentOffset;
    void* alignedPointer = alignAddress(unalignedAddress, GLOBAL_ALIGNMENT, alignmentOffset);

    uintptr_t alignedAddress = reinterpret_cast<uintptr_t>(alignedPointer);

    // Store the adjustment in the byte immediately preceding the adjusted address.
    // This way we can find again the original allocated memory address returned by malloc
    // when this memory unit is released.
    assert(alignmentOffset <= GLOBAL_ALIGNMENT);
    uint8* pAlignedMemory = reinterpret_cast<uint8*>(alignedAddress);
    pAlignedMemory[-1] = static_cast<uint8>(alignmentOffset);

    return alignedPointer;
}

// Release previously allocated memory.
void HeapAllocator::release(void* pointer, size_t size) {