Merge pull request #25970 from dschwen/tc_thread_25969

Enable threaded calculations with thermochimica

modules/chemical_reactions/doc/content/source/userobjects/ThermochimicaElementData.md

@@ -10,7 +10,7 @@ This UserObject is designed for use with thermochemistry library Thermochimica.
 [`ThermochimicaElementData`](ThermochimicaElementData.md) performs Thermochimica calculations on elements.
 
 !alert note
-This object can only be set up using teh [ChemicalComposition](ChemicalCompositionAction.md) action
+This object can only be set up using the [ChemicalComposition](ChemicalCompositionAction.md) action
 
 Thermochimica is called by this object at every execute (please see the Thermochimica user manual
 for more details), and the data required to re-initialize Thermochimica calculations is

modules/chemical_reactions/doc/content/source/userobjects/ThermochimicaNodalData.md

@@ -8,28 +8,14 @@ This UserObject is designed for use with thermochemistry library Thermochimica.
 ## Description
 
 [`ThermochimicaNodalData`](ThermochimicaNodalData.md) performs Thermochimica calculations at nodes.
-In this UserObject, the masses of elements included in the vector variable [!param](/UserObjects/ThermochimicaNodalData/elements) are input
-to the Fortan 90 module Thermochimica, along with the temperature and pressure. Optionally, the
-user may disable Thermochimica calculation re-initialization by setting [!param](/UserObjects/ThermochimicaNodalData/reinit_type) to `none`.
-This may reduce memory use in the calculation, but will likely greatly increase the length of each
-call to Thermochimica.
 
 !alert note
-Currently this object is designed to only work with constant monomial type variables (one DOF per element)!
+This object can only be set up using the [ChemicalComposition](ChemicalCompositionAction.md) action
 
 Thermochimica is called by this object at every execute (please see the Thermochimica user manual
 for more details), and the data required to re-initialize Thermochimica calculations is
 saved/loaded if re-initialization is enabled.
 
-If the optional variable [!param](/UserObjects/ThermochimicaNodalData/output_phases) is set to a non-empty list of phase names, then concentration
-data corresponding to these phases will be output. These phase names must exactly match those specified
-in the datafile used for Thermochimica calculations. Similarly, if [!param](/UserObjects/ThermochimicaNodalData/output_species) is a non-empty list
-of `phase:species` pairs, these will be parsed and the specified species in the specified phases will be
-located in Thermochimica output and stored for later output via an AuxKernel.
-
-If [!param](/UserObjects/ThermochimicaNodalData/output_element_potentials) is a non-empty list formatted as `any_string:element_name`, then the chemical
-potentials of the elements in the list are output to the variables specified in the list.
-
 ## Example Input Syntax
 
 !syntax parameters /UserObjects/ThermochimicaNodalData

modules/chemical_reactions/include/userobjects/ThermochimicaData.h

@@ -32,6 +32,7 @@ class ThermochimicaDataBase : public ThermochimicaDataBaseParent<is_nodal>
 public:
   static InputParameters validParams();
   ThermochimicaDataBase(const InputParameters & parameters);
+  ~ThermochimicaDataBase();
 
   virtual void initialize() override;
   virtual void execute() override;
@@ -70,8 +71,16 @@ class ThermochimicaDataBase : public ThermochimicaDataBaseParent<is_nodal>
   const Data & getData(dof_id_type id) const;
 
 protected:
-  // get current node or element ID
-  auto currentID();
+  // child process routine to dispatch thermochimica calculations
+  void server();
+
+  // helper to wait on a socket read
+  template <typename T>
+  void expect(T expect_msg);
+
+  // send message to socket
+  template <typename T>
+  void notify(T send_msg);
 
   const VariableValue & _pressure;
   const VariableValue & _temperature;
@@ -124,6 +133,21 @@ class ThermochimicaDataBase : public ThermochimicaDataBaseParent<is_nodal>
   /// Mass unit for output species
   const enum class OutputMassUnit { MOLES, FRACTION } _output_mass_unit;
 
+  /// communication socket
+  int _socket;
+
+  /// child PID
+  pid_t _pid;
+
+  /// shared memory pointer for dof_id_type values
+  dof_id_type * _shared_dofid_mem;
+
+  /// shared memory pointer for Real values
+  Real * _shared_real_mem;
+
+  // current node or element ID
+  dof_id_type _current_id;
+
   using ThermochimicaDataBaseParent<is_nodal>::isCoupled;
   using ThermochimicaDataBaseParent<is_nodal>::isParamValid;
   using ThermochimicaDataBaseParent<is_nodal>::coupledValue;