// Represents a specific input of an operation.
typedef struct TF_Input {
  TF_Operation* oper;
  int index;  // The index of the input within oper.
} TF_Input;

// Represents a specific output of an operation.
typedef struct TF_Output {
  TF_Operation* oper;
  int index;  // The index of the output within oper.
} TF_Output;

// TF_Function is a grouping of operations with defined inputs and outputs.

const char* TF_OperationName(TF_Operation* oper) {
  return oper->node.name().c_str();
}

const char* TF_OperationOpType(TF_Operation* oper) {
  return oper->node.type_string().c_str();
}

const char* TF_OperationDevice(TF_Operation* oper) {
  return oper->node.requested_device().c_str();
}

int TF_OperationNumOutputs(TF_Operation* oper) {
  return oper->node.num_outputs();
}

  bool found_neg = false;
  size_t pos = 0;
  TF_Operation* oper;
  while ((oper = TF_GraphNextOperation(graph, &pos)) != nullptr) {
    if (oper == feed) {
      EXPECT_FALSE(found_placeholder);
      found_placeholder = true;
    } else if (oper == three) {
      EXPECT_FALSE(found_scalar_const);
      found_scalar_const = true;
    } else if (oper == add) {
      EXPECT_FALSE(found_add);
      found_add = true;

    std::unordered_map<const Node*, std::vector<int>>* input_nodes)
    TF_EXCLUSIVE_LOCKS_REQUIRED(fn_body->mu) {
  input_tensors->reserve(ninputs);
  for (int i = 0; i < ninputs; ++i) {
    Node* node = inputs[i].oper ? &inputs[i].oper->node : nullptr;
    int idx = inputs[i].index;

    TF_RETURN_WITH_CONTEXT_IF_ERROR(
        fn_body->graph.IsValidOutputTensor(node, idx),

bool GetGraphDef(TF_Graph* graph, tensorflow::GraphDef* graph_def);

bool GetNodeDef(TF_Operation* oper, tensorflow::NodeDef* node_def);

bool GetFunctionDef(TF_Function* func, tensorflow::FunctionDef* func_def);

bool GetAttrValue(TF_Operation* oper, const char* attr_name,
                  tensorflow::AttrValue* attr_value, TF_Status* s);

  TF_DeleteBuffer(buffer);
  TF_DeleteStatus(s);
  return ret;
}

bool GetNodeDef(TF_Operation* oper, tensorflow::NodeDef* node_def) {
  TF_Status* s = TF_NewStatus();
  TF_Buffer* buffer = TF_NewBuffer();
  TF_OperationToNodeDef(oper, buffer, s);
  bool ret = TF_GetCode(s) == TF_OK;
  EXPECT_EQ(TF_OK, TF_GetCode(s)) << TF_Message(s);

-ytinummoc,?p&h21,iog:ol,,ohsdaerpsym,?r&e&ntrapdeeps.remotsuc,su&-lautriv,lautriv,?t&adpusnd,tub-ni,uor-ym,?vres&-e&bucl,mohym,?bew-emoh:.nyd,,luhcs,??ogiv-&niem,ym,??s&d-&onys,ygolonys,?nd&-&dd,nufiat,sehcsimanyd,tenretni,yard,?isoc.nyd,ps,yard,?oper-&nvs,tig,?sndd:.&nyd,sndnyd,?,?vresi-&niem,tset,?xi2,y&awetag-&llawerif,ym,?m,srab,tic-amil,?zten&mitbel,sadtretteuf,??art?i&sdoow?ug??on--nx??e!.&bil?dem?eif?gro?irp?kiir?moc?pia?ude?vog??ei?ffoc?gg?r&f?ged???f&a&c?s??il??g!.&gro?loohcs?moc?t&en?...

    client ->> dep_req: Startet den Request
    Note over dep_req: Führt den Code bis zum yield aus
    dep_req ->> dep_func: Reicht Abhängigkeit weiter
    Note over dep_func: Führt den Code bis zum yield aus
    dep_func ->> operation: Führt Pfadoperation mit Abhängigkeit aus
    operation ->> dep_func: Kehrt aus Pfadoperation zurück
    Note over dep_func: Führt Code nach yield aus
    Note over dep_func: ✅ Abhängigkeit geschlossen

 * **ExchangeFinder** chooses which connection carries each exchange. Where possible it will use the same connection for all exchanges in a single call. It prefers reusing pooled connections over establishing new connections.      

#### Per-Connection Locks

    client ->> dep_req: Start request
    Note over dep_req: Run code up to yield
    dep_req ->> dep_func: Pass dependency
    Note over dep_func: Run code up to yield
    dep_func ->> operation: Run path operation with dependency
    operation ->> dep_func: Return from path operation
    Note over dep_func: Run code after yield
    Note over dep_func: ✅ Dependency closed
    dep_func ->> client: Send response to client