Исходники и презентации

lessons/sync_primitives/livelock/main.go

@@ -0,0 +1,57 @@
+package main
+
+import (
+	"fmt"
+	"runtime"
+	"sync"
+)
+
+// Need to show solution
+
+var mutex1 sync.Mutex
+var mutex2 sync.Mutex
+
+func goroutine1() {
+	mutex1.Lock()
+
+	runtime.Gosched()
+	for !mutex2.TryLock() {
+		// active waiting
+	}
+
+	mutex2.Unlock()
+	mutex1.Unlock()
+
+	fmt.Println("goroutine1 finished")
+}
+
+func goroutine2() {
+	mutex2.Lock()
+
+	runtime.Gosched()
+	for !mutex1.TryLock() {
+		// active waiting
+	}
+
+	mutex1.Unlock()
+	mutex2.Unlock()
+
+	fmt.Println("goroutine2 finished")
+}
+
+func main() {
+	wg := sync.WaitGroup{}
+	wg.Add(2)
+
+	go func() {
+		defer wg.Done()
+		goroutine1()
+	}()
+
+	go func() {
+		defer wg.Done()
+		goroutine2()
+	}()
+
+	wg.Wait()
+}