1 files changed, 45 insertions, 0 deletions
diff --git a/pkg/flipcall/endpoint_futex.go b/pkg/flipcall/endpoint_futex.go
new file mode 100644
index 000000000..5cab02b1d
--- /dev/null
+++ b/pkg/flipcall/endpoint_futex.go
@@ -0,0 +1,45 @@
+// Copyright 2019 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 flipcall
+
+import (
+	"fmt"
+)
+
+type endpointControlState struct{}
+
+func (ep *Endpoint) initControlState(ctrlMode ControlMode) error {
+	if ctrlMode != ControlModeFutex {
+		return fmt.Errorf("unsupported control mode: %v", ctrlMode)
+	}
+	return nil
+}
+
+func (ep *Endpoint) doRoundTrip() error {
+	return ep.doFutexRoundTrip()
+}
+
+func (ep *Endpoint) doWaitFirst() error {
+	return ep.doFutexWaitFirst()
+}
+
+func (ep *Endpoint) doNotifyLast() error {
+	return ep.doFutexNotifyLast()
+}
+
+// Preconditions: ep.isShutdown() == true.
+func (ep *Endpoint) interruptForShutdown() {
+	ep.doFutexInterruptForShutdown()
+}