Move cri server packages under pkg/cri

Organizes the cri related server packages under pkg/cri

Signed-off-by: Derek McGowan <derek@mcg.dev>

pkg/cri/store/util.go

@@ -0,0 +1,42 @@
+/*
+   Copyright The containerd 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 store
+
+import "sync"
+
+// StopCh is used to propagate the stop information of a container.
+type StopCh struct {
+	ch   chan struct{}
+	once sync.Once
+}
+
+// NewStopCh creates a stop channel. The channel is open by default.
+func NewStopCh() *StopCh {
+	return &StopCh{ch: make(chan struct{})}
+}
+
+// Stop close stopCh of the container.
+func (s *StopCh) Stop() {
+	s.once.Do(func() {
+		close(s.ch)
+	})
+}
+
+// Stopped return the stopCh of the container as a readonly channel.
+func (s *StopCh) Stopped() <-chan struct{} {
+	return s.ch
+}