tasks a-s

Task/Program-termination/Go/program-termination-1.go

@@ -0,0 +1,5 @@
+func main() {
+    if problem {
+        return
+    }
+}

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")
+}

Task/Program-termination/Go/program-termination-3.go

@@ -0,0 +1,13 @@
+func main() {
+    fmt.Println("main program start")
+
+    // this will not get run on os.Exit
+    defer func() {
+        fmt.Println("deferred function")
+    }()
+
+    if problem {
+        fmt.Println("main program exiting")
+        os.Exit(-1)
+    }
+}

Task/Program-termination/Go/program-termination-4.go

@@ -0,0 +1,17 @@
+func pcj() {
+    fmt.Println("at the junction")
+    defer func() {
+        fmt.Println("deferred from pcj")
+    }()
+    panic(10)
+}
+
+func main() {
+    fmt.Println("main program start")
+    defer func() {
+        fmt.Println("deferred from main")
+    }()
+    go pcj()
+    time.Sleep(1e9)
+    fmt.Println("main program done")
+}