feat: Waku v2 bridge

Issue #12610

vendor/github.com/pion/transport/vnet/chunk_queue.go

@@ -0,0 +1,65 @@
+package vnet
+
+import (
+	"sync"
+)
+
+type chunkQueue struct {
+	chunks       []Chunk
+	maxSize      int // 0 or negative value: unlimited
+	maxBytes     int // 0 or negative value: unlimited
+	currentBytes int
+	mutex        sync.RWMutex
+}
+
+func newChunkQueue(maxSize int, maxBytes int) *chunkQueue {
+	return &chunkQueue{
+		chunks:       []Chunk{},
+		maxSize:      maxSize,
+		maxBytes:     maxBytes,
+		currentBytes: 0,
+		mutex:        sync.RWMutex{},
+	}
+}
+
+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
+	}
+	if q.maxBytes > 0 && q.currentBytes+len(c.UserData()) >= q.maxBytes {
+		return false
+	}
+
+	q.currentBytes += len(c.UserData())
+	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:]
+	q.currentBytes -= len(c.UserData())
+
+	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]
+}