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