Function newInternalMapWithOptions

internal/bigmap/bigmap_internal.go:410–454

newInternalMapWithOptions creates a new instance of internalMap.

(ctx context.Context, hasValues bool, opts *Options)

// newInternalMapWithOptions creates a new instance of internalMap.
func newInternalMapWithOptions(ctx context.Context, hasValues bool, opts *Options) (*internalMap, error) {
	if opts == nil {
		opts = &Options{}
	}

	if opts.LoadFactorPercentage == 0 {
		opts.LoadFactorPercentage = defaultLoadFactorPercentage
	}

	if opts.MemorySegmentSize == 0 {
		opts.MemorySegmentSize = defaultMemorySegmentSize
	}

	if opts.NumMemorySegments == 0 {
		opts.NumMemorySegments = defaultNumMemorySegments
	}

	if opts.FileSegmentSize == 0 {
		opts.FileSegmentSize = defaultFileSegmentSize
	}

	if opts.InitialSizeLogarithm == 0 {
		opts.InitialSizeLogarithm = defaultInitialSizeLogarithm
	}

	tablewSizeIndex := opts.InitialSizeLogarithm - minSizeLogarithm

	if tablewSizeIndex < 1 {
		return nil, errors.New("invalid initial size")
	}

	m := &internalMap{
		hasValues:      hasValues,
		opts:           *opts,
		tableSizeIndex: tablewSizeIndex,
		h2Prime:        tableSizesPrimes[tablewSizeIndex-1], // h2 prime < number of slots
		slots:          make([]entry, tableSizesPrimes[tablewSizeIndex]),
	}

	m.mu.Lock()
	m.segments = append(m.segments, m.newSegment(ctx))
	m.mu.Unlock()

	return m, nil
}