std::shared_ptr<char> MemoryStock::pop ( bool  block )

inlineprivate

Definition at line 42 of file MemoryManager.h.

    {
        if (block)
        {
            // No free slot available, next alloc would exceed max memory:
            // block until a slot is available
            std::unique_lock<std::mutex> lock(fMutexCond);
            while (fMemoryStock.empty() && fAllocated+fChunkSize>fMaxMemory)
                fCond.wait(lock);
        }
        else
        {
            // No free slot available, next alloc would exceed max memory
            // return an empty pointer
            if (fMemoryStock.empty() && fAllocated+fChunkSize>fMaxMemory)
                return std::shared_ptr<char>();
        }

        // We will return this amount of memory
        // This is not 100% thread safe, but it is not a super accurate measure anyway
        fInUse += fChunkSize;
        if (fInUse>fMaxInUse)
            fMaxInUse = fInUse;

        if (fMemoryStock.empty())
        {
            // No free slot available, allocate a new one
            fAllocated += fChunkSize;
            return std::shared_ptr<char>(new char[fChunkSize]);
        }

        // Get the next free slot from the stack and return it
        const std::lock_guard<std::mutex> lock(fMutexMem);

        const auto mem = fMemoryStock.front();
        fMemoryStock.pop_front();
        return mem;
    };