修复投影仪控制

internal/common/pause_sub.go

@@ -0,0 +1,53 @@
+package common
+
+import "sync"
+
+type PauseSub struct {
+	ctrl *CtrlWait
+	// 回调函数
+	items []chan int8
+	m     sync.RWMutex
+}
+
+// Add 添加一个暂停项
+func (p *PauseSub) Add(item chan int8) {
+	p.m.Lock()
+	defer p.m.Unlock()
+	p.items = append(p.items, item)
+}
+
+// Remove 移除一个暂停项
+func (p *PauseSub) Remove(item chan int8) {
+	p.m.Lock()
+	defer p.m.Unlock()
+	for i, v := range p.items {
+		if v == item {
+			p.items = append(p.items[:i], p.items[i+1:]...)
+		}
+	}
+}
+
+// Run 开始监听
+func (p *PauseSub) Run() {
+	p.ctrl.Open()
+	defer p.ctrl.Close()
+
+	for {
+		select {
+		case <-p.ctrl.C:
+			go func() {
+				p.m.RLock()
+				defer p.m.RUnlock()
+				for _, item := range p.items {
+					item <- 1
+				}
+			}()
+		}
+	}
+}
+
+func NewPauseSub(c *CtrlWait) *PauseSub {
+	return &PauseSub{
+		ctrl: c,
+	}
+}