66 lines
1.1 KiB
Go
66 lines
1.1 KiB
Go
package vnet
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import (
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"sync"
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)
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type chunkQueue struct {
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chunks []Chunk
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maxSize int // 0 or negative value: unlimited
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maxBytes int // 0 or negative value: unlimited
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currentBytes int
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mutex sync.RWMutex
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}
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func newChunkQueue(maxSize int, maxBytes int) *chunkQueue {
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return &chunkQueue{
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chunks: []Chunk{},
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maxSize: maxSize,
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maxBytes: maxBytes,
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currentBytes: 0,
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mutex: sync.RWMutex{},
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}
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}
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func (q *chunkQueue) push(c Chunk) bool {
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q.mutex.Lock()
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defer q.mutex.Unlock()
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if q.maxSize > 0 && len(q.chunks) >= q.maxSize {
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return false // dropped
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}
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if q.maxBytes > 0 && q.currentBytes+len(c.UserData()) >= q.maxBytes {
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return false
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}
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q.currentBytes += len(c.UserData())
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q.chunks = append(q.chunks, c)
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return true
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}
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func (q *chunkQueue) pop() (Chunk, bool) {
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q.mutex.Lock()
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defer q.mutex.Unlock()
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if len(q.chunks) == 0 {
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return nil, false
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}
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c := q.chunks[0]
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q.chunks = q.chunks[1:]
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q.currentBytes -= len(c.UserData())
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return c, true
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}
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func (q *chunkQueue) peek() Chunk {
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q.mutex.RLock()
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defer q.mutex.RUnlock()
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if len(q.chunks) == 0 {
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return nil
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}
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return q.chunks[0]
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}
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