tasks a-s

Task/Program-termination/Go/program-termination-2.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+    "fmt"
+    "runtime"
+    "time"
+)
+
+const problem = true
+
+func main() {
+    fmt.Println("main program start")
+
+    // this will get run on exit
+    defer paperwork()
+
+    // this will not run to completion
+    go pcj()
+
+    // this will not get run on exit
+    rec := &requiresExternalCleanup{"external object"}
+    runtime.SetFinalizer(rec, cleanup)
+
+    if problem {
+        fmt.Println("main program returning")
+        return
+    }
+}
+
+func paperwork() {
+    fmt.Println("i's dotted, t's crossed")
+}
+
+func pcj() {
+    fmt.Println("there's uncle Joe")
+    time.Sleep(1e10)
+    fmt.Println("movin kinda slow")
+}
+
+type requiresExternalCleanup struct {
+    id string
+}
+
+func cleanup(rec *requiresExternalCleanup) {
+    fmt.Println(rec.id, "cleanup")
+}