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52 lines
945 B
Go
52 lines
945 B
Go
package allocator
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import (
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"go.uber.org/atomic"
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"github.com/milvus-io/milvus/pkg/v3/util/typeutil"
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)
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const (
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defaultInitializedValue = 0
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defaultDelta = 1
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)
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type AtomicAllocator struct {
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now atomic.Int64
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delta int64
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}
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type Option func(allocator *AtomicAllocator)
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func WithInitializedValue(value int64) Option {
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return func(allocator *AtomicAllocator) {
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allocator.now.Store(value)
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}
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}
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func WithDelta(delta int64) Option {
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return func(allocator *AtomicAllocator) {
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allocator.delta = delta
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}
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}
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func (alloc *AtomicAllocator) apply(opts ...Option) {
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for _, opt := range opts {
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opt(alloc)
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}
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}
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func (alloc *AtomicAllocator) AllocID() (typeutil.UniqueID, error) {
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id := alloc.now.Add(alloc.delta)
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return id, nil
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}
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func NewAllocator(opts ...Option) *AtomicAllocator {
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alloc := &AtomicAllocator{
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now: *atomic.NewInt64(defaultInitializedValue),
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delta: defaultDelta,
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}
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alloc.apply(opts...)
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return alloc
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}
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