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authorgVisor bot <gvisor-bot@google.com>2020-07-13 00:24:39 +0000
committergVisor bot <gvisor-bot@google.com>2020-07-13 00:24:39 +0000
commitd1eb28b4e318c9efab490ddb268bebfec787d6b9 (patch)
tree12b9d2a3ba8446496a4dc928c26bc17c0e7b870e /pkg/sync
parent4d77d43d8d1194f05e72db3d361ecdb93fac0296 (diff)
parent9c32fd3f4d8f6e63d922c1c58b7d1f1f504fa2bc (diff)
Merge release-20200622.1-92-g9c32fd3f4 (automated)
Diffstat (limited to 'pkg/sync')
-rw-r--r--pkg/sync/nocopy.go28
1 files changed, 28 insertions, 0 deletions
diff --git a/pkg/sync/nocopy.go b/pkg/sync/nocopy.go
new file mode 100644
index 000000000..722b29501
--- /dev/null
+++ b/pkg/sync/nocopy.go
@@ -0,0 +1,28 @@
+// Copyright 2020 The gVisor 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 sync
+
+// NoCopy may be embedded into structs which must not be copied
+// after the first use.
+//
+// See https://golang.org/issues/8005#issuecomment-190753527
+// for details.
+type NoCopy struct{}
+
+// Lock is a no-op used by -copylocks checker from `go vet`.
+func (*NoCopy) Lock() {}
+
+// Unlock is a no-op used by -copylocks checker from `go vet`.
+func (*NoCopy) Unlock() {}