/usr/include/trilinos/ROL_EpetraBatchManager.hpp is in libtrilinos-rol-dev 12.12.1-5.
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// ************************************************************************
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// Rapid Optimization Library (ROL) Package
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#ifndef ROL_EPETRABATCHMANAGER_HPP
#define ROL_EPETRABATCHMANAGER_HPP
#include "ROL_BatchManager.hpp"
#include "Epetra_Comm.h"
namespace ROL {
template<class Real>
class EpetraBatchManager : public BatchManager<Real> {
protected:
Teuchos::RCP<Epetra_Comm> comm_;
public:
virtual ~EpetraBatchManager() {}
EpetraBatchManager(Teuchos::RCP<Epetra_Comm> &comm) : comm_(comm) {}
int batchID(void) { return comm_->MyPID(); }
int numBatches(void) { return comm_->NumProc(); }
void reduceAll(Real* input, Real* output,
const Elementwise::ReductionOp<Real> &r) {
int nB = this->numBatches();
std::vector<Real> receiveBuffer(nB);
comm_->GatherAll(input,&receiveBuffer[0],1);
output[0] = r.initialValue();
for (int i = 0; i < nB; i++) {
r.reduce(receiveBuffer[i],output[0]);
}
comm_->Broadcast(output,1,0);
}
void sumAll(Real* input, Real* output, int dim) { comm_->SumAll(input,output,dim); }
void broadcast(Real* input, int cnt, int root) {
comm_->Broadcast(input, cnt, root);
}
void barrier(void) {
comm_->Barrier();
}
};
}
#endif
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