Check in gVisor.

PiperOrigin-RevId: 194583126
Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463

1 files changed, 43 insertions, 0 deletions

diff --git a/pkg/sentry/kernel/ipc_namespace.go b/pkg/sentry/kernel/ipc_namespace.go
new file mode 100644
index 000000000..78737f58f
--- /dev/null
+++ b/pkg/sentry/kernel/ipc_namespace.go
@@ -0,0 +1,43 @@
+// Copyright 2018 Google Inc.
+//
+// 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 kernel
+
+import (
+	"gvisor.googlesource.com/gvisor/pkg/sentry/kernel/semaphore"
+)
+
+// IPCNamespace represents an IPC namespace.
+type IPCNamespace struct {
+	semaphores *semaphore.Registry
+}
+
+// NewIPCNamespace creates a new IPC namespace.
+func NewIPCNamespace() *IPCNamespace {
+	return &IPCNamespace{
+		semaphores: semaphore.NewRegistry(),
+	}
+}
+
+// SemaphoreRegistry returns the semanphore set registry for this namespace.
+func (i *IPCNamespace) SemaphoreRegistry() *semaphore.Registry {
+	return i.semaphores
+}
+
+// IPCNamespace returns the task's IPC namespace.
+func (t *Task) IPCNamespace() *IPCNamespace {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	return t.ipcns
+}