save every coupling iteration, not sub-cycle

Author: nkr

adapter/PreciceInterface.c

@@ -114,6 +114,11 @@ bool Precice_IsWriteCheckpointRequired()
 	return precicec_isActionRequired( "write-iteration-checkpoint" );
 }
 
+bool Precice_IsCouplingTimestepComplete()
+{
+	return precicec_isCouplingTimestepComplete();
+}
+
 void Precice_FulfilledReadCheckpoint()
 {
 	precicec_fulfilledAction( "read-iteration-checkpoint" );

adapter/PreciceInterface.h

@@ -187,6 +187,12 @@ bool Precice_IsReadCheckpointRequired();
  */
 bool Precice_IsWriteCheckpointRequired();
 
+/**
+ * @brief Returns true if coupling timestep is complete
+ * @return
+ */
+bool Precice_IsCouplingTimestepComplete();
+
 /**
  * @brief Tells preCICE that the checkpoint has been read
  */

nonlingeo_precice.c

@@ -1089,6 +1089,8 @@ void nonlingeo_precice(double **cop, ITG *nk, ITG **konp, ITG **ipkonp, char **l
   /* Adapter: Create the interfaces and initialize the coupling */
   printf("About to enter preCICE setup in Calculix with names %s and %s \n", preciceParticipantName, configFilename);
   Precice_Setup( configFilename, preciceParticipantName, &simulationData );
+  // Initialize for the first step because Precice_IsCouplingTimestepComplete will return false until the end of the first step
+  if( !simulationData.coupling_implicit ) Precice_WriteIterationCheckpoint( &simulationData, vini );
 
   /* Adapter: Give preCICE the control of the time stepping */
   while( Precice_IsCouplingOngoing() ){
@@ -1114,11 +1116,14 @@ void nonlingeo_precice(double **cop, ITG *nk, ITG **konp, ITG **ipkonp, char **l
 
 	  memcpy(&vini[0],&vold[0],sizeof(double)*mt**nk);
 
-	  if( Precice_IsWriteCheckpointRequired() == simulationData.coupling_implicit)
+	  if( Precice_IsWriteCheckpointRequired() ) // implicit coupling
       	  {
           	Precice_WriteIterationCheckpoint( &simulationData, vini );
-          	if( Precice_IsWriteCheckpointRequired() ) Precice_FulfilledWriteCheckpoint();
+          	Precice_FulfilledWriteCheckpoint();
           }
+      if( Precice_IsCouplingTimestepComplete() && !simulationData.coupling_implicit ) // explicit coupling
+      Precice_WriteIterationCheckpoint( &simulationData, vini );
+
 
 	  for(k=0;k<*nboun;++k){xbounini[k]=xbounact[k];}
 	  if((*ithermal==1)||(*ithermal>=3)){