加了缓存

cache/queue.go

@@ -0,0 +1,57 @@
+package cache
+
+type Cache struct {
+	cache []byte
+	l     int //length of content, not length of slice.
+}
+
+type QueueCache struct { //FIFO
+	queue chan *Cache
+}
+
+type BlockingQueueCache QueueCache  
+
+type UnblockingQueueCache QueueCache  
+
+func NewUnblockingQueueCache(quN int) *UnblockingQueueCache {
+	t := &UnblockingQueueCache{
+		queue: make(chan *Cache, quN),
+	}
+	return t
+}
+
+func (this *UnblockingQueueCache) Put(bits []byte, l int) {
+	this.queue <- &Cache{
+		cache: bits,
+		l:     l,
+	}
+}
+
+func (this *UnblockingQueueCache) Get() ([]byte, int) {
+	var t *Cache
+	select {
+	case t = <-this.queue:
+	default:
+		return make([]byte, 1024*4), 1024 * 4
+	}
+	return t.cache, t.l
+}
+
+func NewBlockingQueueCache(quN int) *BlockingQueueCache {
+	t := &BlockingQueueCache{
+		queue: make(chan *Cache, quN),
+	}
+	return t
+}
+
+func (this *BlockingQueueCache) Put(bits []byte, l int) {
+	this.queue <- &Cache{
+		cache: bits,
+		l:     l,
+	}
+}
+
+func (this *BlockingQueueCache) Get() ([]byte, int) {
+	 t := <-this.queue
+	return t.cache, t.l
+}