rebase: update all k8s packages to 0.27.2

Signed-off-by: Niels de Vos <ndevos@ibm.com>

vendor/k8s.io/apimachinery/pkg/util/wait/timer.go

@@ -0,0 +1,121 @@
+/*
+Copyright 2023 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package wait
+
+import (
+	"time"
+
+	"k8s.io/utils/clock"
+)
+
+// Timer abstracts how wait functions interact with time runtime efficiently. Test
+// code may implement this interface directly but package consumers are encouraged
+// to use the Backoff type as the primary mechanism for acquiring a Timer. The
+// interface is a simplification of clock.Timer to prevent misuse. Timers are not
+// expected to be safe for calls from multiple goroutines.
+type Timer interface {
+	// C returns a channel that will receive a struct{} each time the timer fires.
+	// The channel should not be waited on after Stop() is invoked. It is allowed
+	// to cache the returned value of C() for the lifetime of the Timer.
+	C() <-chan time.Time
+	// Next is invoked by wait functions to signal timers that the next interval
+	// should begin. You may only use Next() if you have drained the channel C().
+	// You should not call Next() after Stop() is invoked.
+	Next()
+	// Stop releases the timer. It is safe to invoke if no other methods have been
+	// called.
+	Stop()
+}
+
+type noopTimer struct {
+	closedCh <-chan time.Time
+}
+
+// newNoopTimer creates a timer with a unique channel to avoid contention
+// for the channel's lock across multiple unrelated timers.
+func newNoopTimer() noopTimer {
+	ch := make(chan time.Time)
+	close(ch)
+	return noopTimer{closedCh: ch}
+}
+
+func (t noopTimer) C() <-chan time.Time {
+	return t.closedCh
+}
+func (noopTimer) Next() {}
+func (noopTimer) Stop() {}
+
+type variableTimer struct {
+	fn  DelayFunc
+	t   clock.Timer
+	new func(time.Duration) clock.Timer
+}
+
+func (t *variableTimer) C() <-chan time.Time {
+	if t.t == nil {
+		d := t.fn()
+		t.t = t.new(d)
+	}
+	return t.t.C()
+}
+func (t *variableTimer) Next() {
+	if t.t == nil {
+		return
+	}
+	d := t.fn()
+	t.t.Reset(d)
+}
+func (t *variableTimer) Stop() {
+	if t.t == nil {
+		return
+	}
+	t.t.Stop()
+	t.t = nil
+}
+
+type fixedTimer struct {
+	interval time.Duration
+	t        clock.Ticker
+	new      func(time.Duration) clock.Ticker
+}
+
+func (t *fixedTimer) C() <-chan time.Time {
+	if t.t == nil {
+		t.t = t.new(t.interval)
+	}
+	return t.t.C()
+}
+func (t *fixedTimer) Next() {
+	// no-op for fixed timers
+}
+func (t *fixedTimer) Stop() {
+	if t.t == nil {
+		return
+	}
+	t.t.Stop()
+	t.t = nil
+}
+
+var (
+	// RealTimer can be passed to methods that need a clock.Timer.
+	RealTimer = clock.RealClock{}.NewTimer
+)
+
+var (
+	// internalClock is used for test injection of clocks
+	internalClock = clock.RealClock{}
+)