Adding Operation._control_outputs

PiperOrigin-RevId: 191659944

3 files changed, 32 insertions, 0 deletions

diff --git a/tensorflow/python/client/tf_session.i b/tensorflow/python/client/tf_session.i
index 0c18d973a7..b82182d5d3 100644
--- a/tensorflow/python/client/tf_session.i
+++ b/tensorflow/python/client/tf_session.i
@@ -157,6 +157,25 @@ tensorflow::ImportNumpy();
   }
 }
 
+// We use TF_OperationGetControlOutputs_wrapper instead of
+// TF_OperationGetControlOutputs
+%ignore TF_OperationGetControlOutputs;
+%unignore TF_OperationGetControlOutputs_wrapper;
+// See comment for "%noexception TF_SessionRun_wrapper;"
+%noexception TF_OperationGetControlOutputs_wrapper;
+
+// Build a Python list of TF_Operation* and return it.
+%typemap(out) std::vector<TF_Operation*> tensorflow::TF_OperationGetControlOutputs_wrapper {
+  $result = PyList_New($1.size());
+  if (!$result) {
+    SWIG_exception_fail(SWIG_MemoryError, "$symname: couldn't create list");
+  }
+
+  for (size_t i = 0; i < $1.size(); ++i) {
+    PyList_SET_ITEM($result, i, CreateWrappedTFOperation($1[i]));
+  }
+}
+
 %ignore TF_OperationOutputConsumers;
 %unignore TF_OperationOutputConsumers_wrapper;
 // See comment for "%noexception TF_SessionRun_wrapper;"
diff --git a/tensorflow/python/client/tf_session_helper.cc b/tensorflow/python/client/tf_session_helper.cc
index ca57abd712..b48d758e4a 100644
--- a/tensorflow/python/client/tf_session_helper.cc
+++ b/tensorflow/python/client/tf_session_helper.cc
@@ -550,6 +550,15 @@ std::vector<TF_Operation*> TF_OperationGetControlInputs_wrapper(
   return control_inputs;
 }
 
+std::vector<TF_Operation*> TF_OperationGetControlOutputs_wrapper(
+    TF_Operation* oper) {
+  std::vector<TF_Operation*> control_outputs(
+      TF_OperationNumControlOutputs(oper));
+  TF_OperationGetControlOutputs(oper, control_outputs.data(),
+                                control_outputs.size());
+  return control_outputs;
+}
+
 std::vector<const char*> TF_OperationOutputConsumers_wrapper(
     TF_Output oper_out) {
   int num_consumers = TF_OperationOutputNumConsumers(oper_out);
diff --git a/tensorflow/python/client/tf_session_helper.h b/tensorflow/python/client/tf_session_helper.h
index 5416d41376..d2b4abc476 100644
--- a/tensorflow/python/client/tf_session_helper.h
+++ b/tensorflow/python/client/tf_session_helper.h
@@ -190,6 +190,10 @@ std::vector<TF_Output> GetOperationInputs(TF_Operation* oper);
 std::vector<TF_Operation*> TF_OperationGetControlInputs_wrapper(
     TF_Operation* oper);
 
+// Retrieves the control outputs of this operation.
+std::vector<TF_Operation*> TF_OperationGetControlOutputs_wrapper(
+    TF_Operation* oper);
+
 // Retrieves the op names of the consumers of `oper_out`. The returned strings
 // have the lifetime of the underlying TF_Graph.
 std::vector<const char*> TF_OperationOutputConsumers_wrapper(