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35 lines
773 B
Go
35 lines
773 B
Go
package tcp
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// tcp段的堆，用来暂存失序的tcp段
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// 实现了堆排序
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type segmentHeap []*segment
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// Len returns the length of h.
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func (h segmentHeap) Len() int {
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return len(h)
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}
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// Less determines whether the i-th element of h is less than the j-th element.
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func (h segmentHeap) Less(i, j int) bool {
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return h[i].sequenceNumber.LessThan(h[j].sequenceNumber)
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}
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// Swap swaps the i-th and j-th elements of h.
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func (h segmentHeap) Swap(i, j int) {
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h[i], h[j] = h[j], h[i]
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}
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// Push adds x as the last element of h.
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func (h *segmentHeap) Push(x interface{}) {
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*h = append(*h, x.(*segment))
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}
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// Pop removes the last element of h and returns it.
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func (h *segmentHeap) Pop() interface{} {
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old := *h
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n := len(old)
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x := old[n-1]
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*h = old[:n-1]
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return x
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}
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