48 lines
709 B
Go
48 lines
709 B
Go
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package main
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import (
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"container/list"
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"github.com/filecoin-project/lotus/chain/store"
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)
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type headBuffer struct {
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buffer *list.List
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size int
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}
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func NewHeadBuffer(size int) *headBuffer {
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buffer := list.New()
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buffer.Init()
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return &headBuffer{
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buffer: buffer,
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size: size,
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}
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}
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func (h *headBuffer) Push(hc *store.HeadChange) (rethc *store.HeadChange) {
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if h.buffer.Len() == h.size {
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var ok bool
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el := h.buffer.Front()
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rethc, ok = el.Value.(*store.HeadChange)
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if !ok {
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panic("Value from list is not the correct type")
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}
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h.buffer.Remove(el)
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}
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h.buffer.PushBack(hc)
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return
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}
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func (h *headBuffer) Pop() {
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el := h.buffer.Back()
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if el != nil {
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h.buffer.Remove(el)
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}
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}
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