Исходники и презентации

lessons/garbage_collector/finalizers_cycle/main.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"fmt"
+	"runtime"
+	"time"
+)
+
+type Foo struct {
+	bar *Bar
+}
+
+type Bar struct {
+	foo *Foo
+}
+
+func main() {
+	foo := &Foo{}
+	bar := &Bar{}
+
+	foo.bar = bar
+	bar.foo = foo
+
+	runtime.SetFinalizer(foo, func(ptr *Foo) {
+		fmt.Println("finalizer called on addr", ptr, "value is", *ptr)
+	})
+
+	runtime.SetFinalizer(bar, func(ptr *Bar) {
+		fmt.Println("finalizer called on addr", ptr, "value is", *ptr)
+	})
+
+	runtime.GC()
+	time.Sleep(10 * time.Second)
+}