Method release

src/memory/PoolAllocator.cpp:195–226

Release previously allocated memory.

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

    // Lock the method with a mutex
    std::lock_guard<std::mutex> lock(mMutex);

    assert(size > 0);

    // Cannot release a 0-byte allocated memory
    if (size == 0) return;

#ifndef NDEBUG
        mNbTimesAllocateMethodCalled--;
#endif

    // If the size is larger than the maximum memory unit size
    if (size > MAX_UNIT_SIZE) {

        // Release the memory using the default deallocation
        mBaseAllocator.release(pointer, size);
        return;
    }

    // Get the index of the heap that has handled the corresponding allocation request
    int indexHeap = mMapSizeToHeapIndex[size];
    assert(indexHeap >= 0 && indexHeap < NB_HEAPS);

    // Insert the released memory unit into the list of free memory units of the
    // corresponding heap
    MemoryUnit* releasedUnit = static_cast<MemoryUnit*>(pointer);
    releasedUnit->nextUnit = mFreeMemoryUnits[indexHeap];
    mFreeMemoryUnits[indexHeap] = releasedUnit;
}