1 files changed, 22 insertions, 0 deletions
diff --git a/tensorflow/core/kernels/control_flow_ops.h b/tensorflow/core/kernels/control_flow_ops.h
new file mode 100644
index 0000000000..184cc9fb63
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+++ b/tensorflow/core/kernels/control_flow_ops.h
@@ -0,0 +1,22 @@
+#ifndef TENSORFLOW_KERNELS_CONTROL_FLOW_OPS_H_
+#define TENSORFLOW_KERNELS_CONTROL_FLOW_OPS_H_
+
+#include "tensorflow/core/framework/op_kernel.h"
+
+namespace tensorflow {
+
+// A ControlTriggerOp is similar to a NoOp. However, it always treats the input
+// control edges as Live edges. Its primary use so far is in the scheduling of
+// recvs, where we add ControlTrigger nodes and use them to trigger recvs. We
+// allow ControlTrigger nodes to be enabled by dead nodes.
+class ControlTriggerOp : public OpKernel {
+ public:
+  explicit ControlTriggerOp(OpKernelConstruction* context)
+      : OpKernel(context) {}
+  void Compute(OpKernelContext* context) override {}
+  bool IsExpensive() override { return false; }
+};
+
+}  // namespace tensorflow
+
+#endif  // TENSORFLOW_KERNELS_CONTROL_FLOW_OPS_H_