LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2021 jar3b
+Copyright (c) 2019 jar3b
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

close_handler.go

@@ -1,17 +1,11 @@
 package grawt
 
-import (
-	"sync"
-)
-
 type CloseHandler struct {
 	waiter      *Waiter
 	Quit        chan struct{}
 	active      bool
 	autoDone    bool
-	wgDone      bool
 	handlerFunc *func()
-	mu          *sync.Mutex
 }
 
 func (ch *CloseHandler) Halt(err error) {

go.mod

@@ -1,5 +1,3 @@
 module github.com/jar3b/grawt
 
-go 1.16
-
-require github.com/sirupsen/logrus v1.8.1
+require github.com/sirupsen/logrus v1.4.1

go.sum

@@ -1,10 +0,0 @@
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
-github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
-github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
-github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
-golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 h1:YyJpGZS1sBuBCzLAR1VEpK193GlqGZbnPFnPV/5Rsb4=
-golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

waiter.go

@@ -9,65 +9,33 @@ import (
 )
 
 type Waiter struct {
-	sync.RWMutex
 	blockingMode  bool
 	waitGroup     sync.WaitGroup
 	closeHandlers []*CloseHandler
-	haltingFlag   bool
-	haltingMutex  sync.RWMutex
-}
-
-func (w *Waiter) isHalting() bool {
-	w.haltingMutex.RLock()
-	defer w.haltingMutex.RUnlock()
-	return w.haltingFlag
-}
-
-func (w *Waiter) setHalting(value bool) {
-	w.haltingMutex.Lock()
-	defer w.haltingMutex.Unlock()
-	w.haltingFlag = value
 }
 
 func (w *Waiter) addHandler(f *func(), autoDone bool) *CloseHandler {
 	ch := CloseHandler{
-		waiter:      w,
-		Quit:        make(chan struct{}, 1),
-		active:      true,
-		autoDone:    autoDone,
-		wgDone:      false,
-		handlerFunc: f,
-		mu:          &sync.Mutex{},
+		w,
+		make(chan struct{}, 1),
+		true,
+		autoDone,
+		f,
 	}
-
-	w.Lock()
 	w.waitGroup.Add(1)
 	w.closeHandlers = append(w.closeHandlers, &ch)
-	w.Unlock()
 
 	return &ch
 }
 
 func (w *Waiter) terminateHandler(h *CloseHandler, forceWaitGroupDone bool) {
-	h.mu.Lock()
-	defer h.mu.Unlock()
-	if !h.active {
-		if !h.wgDone {
-			w.waitGroup.Done()
-		}
-		return
-	}
-
 	if h.handlerFunc != nil && *h.handlerFunc != nil {
 		(*h.handlerFunc)()
 	}
-
-	close(h.Quit)
+	h.Quit <- struct{}{}
 	if h.autoDone || forceWaitGroupDone {
 		w.waitGroup.Done()
-		h.wgDone = true
 	}
-
 	h.active = false
 }
 
@@ -76,17 +44,11 @@ func (w *Waiter) AddCloseHandler(f func(), waitForChannel bool) *CloseHandler {
 }
 
 func (w *Waiter) Halt(err error) {
-	if w.isHalting() {
-		return
-	}
-	w.setHalting(true)
-
-	w.RLock()
 	for _, h := range w.closeHandlers {
-		w.terminateHandler(h, false)
+		if h.active {
+			w.terminateHandler(h, false)
+		}
 	}
-	w.RUnlock()
-
 	if err != nil {
 		log.Errorf("Program was terminated with error: %v", err)
 	} else {
@@ -99,15 +61,12 @@ func (w *Waiter) Halt(err error) {
 			os.Exit(0)
 		}
 	}
-
-	w.setHalting(false)
 }
 
 func (w *Waiter) Wait() {
 	w.blockingMode = true
 	log.Info("Waiting...")
 	w.waitGroup.Wait()
-	log.Info("Terminated")
 }
 
 func (w *Waiter) onSignal(sig os.Signal) {
@@ -117,12 +76,9 @@ func (w *Waiter) onSignal(sig os.Signal) {
 
 func NewWaiter() *Waiter {
 	w := Waiter{
-		sync.RWMutex{},
 		false,
 		sync.WaitGroup{},
 		make([]*CloseHandler, 0),
-		false,
-		sync.RWMutex{},
 	}
 	sigs := make(chan os.Signal, 1)
 	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)