add vendor

vendor/github.com/gin-gonic/gin/examples/realtime-advanced/stats.go

@@ -0,0 +1,56 @@
+package main
+
+import (
+	"runtime"
+	"sync"
+	"time"
+
+	"github.com/manucorporat/stats"
+)
+
+var ips = stats.New()
+var messages = stats.New()
+var users = stats.New()
+var mutexStats sync.RWMutex
+var savedStats map[string]uint64
+
+func statsWorker() {
+	c := time.Tick(1 * time.Second)
+	var lastMallocs uint64
+	var lastFrees uint64
+	for range c {
+		var stats runtime.MemStats
+		runtime.ReadMemStats(&stats)
+
+		mutexStats.Lock()
+		savedStats = map[string]uint64{
+			"timestamp":  uint64(time.Now().Unix()),
+			"HeapInuse":  stats.HeapInuse,
+			"StackInuse": stats.StackInuse,
+			"Mallocs":    (stats.Mallocs - lastMallocs),
+			"Frees":      (stats.Frees - lastFrees),
+			"Inbound":    uint64(messages.Get("inbound")),
+			"Outbound":   uint64(messages.Get("outbound")),
+			"Connected":  connectedUsers(),
+		}
+		lastMallocs = stats.Mallocs
+		lastFrees = stats.Frees
+		messages.Reset()
+		mutexStats.Unlock()
+	}
+}
+
+func connectedUsers() uint64 {
+	connected := users.Get("connected") - users.Get("disconnected")
+	if connected < 0 {
+		return 0
+	}
+	return uint64(connected)
+}
+
+func Stats() map[string]uint64 {
+	mutexStats.RLock()
+	defer mutexStats.RUnlock()
+
+	return savedStats
+}