Method Add

src/CacheMemory.cpp:47–69

Add a Frame to the cache

// Add a Frame to the cache
void CacheMemory::Add(std::shared_ptr<Frame> frame)
{
	// Create a scoped lock, to protect the cache from multiple threads
	const std::lock_guard<std::recursive_mutex> lock(*cacheMutex);
	int64_t frame_number = frame->number;

	// Freshen frame if it already exists
	if (frames.count(frame_number))
		// Move frame to front of queue
		Touch(frame_number);

	else
	{
		// Add frame to queue and map
		frames[frame_number] = frame;
		frame_numbers.push_front(frame_number);
		ordered_frame_numbers.push_back(frame_number);
		needs_range_processing = true;

		// Clean up old frames
		CleanUp();
	}
}

// Check if frame is already contained in cache
bool CacheMemory::Contains(int64_t frame_number) {