/usr/include/trilinos/ROL_TeuchosBatchManager.hpp is in libtrilinos-rol-dev 12.12.1-5.
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// ************************************************************************
//
// Rapid Optimization Library (ROL) Package
// Copyright (2014) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
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// @HEADER
#ifndef ROLTEUCHOSBATCHMANAGER_HPP
#define ROLTEUCHOSBATCHMANAGER_HPP
#include "ROL_BatchManager.hpp"
#include "Teuchos_RCP.hpp"
#include "Teuchos_Comm.hpp"
#include "Teuchos_CommHelpers.hpp"
namespace ROL {
template<class Real, class Ordinal>
class TeuchosBatchManager : public BatchManager<Real> {
private:
const Teuchos::RCP<const Teuchos::Comm<Ordinal> > comm_;
public:
TeuchosBatchManager(const Teuchos::RCP<const Teuchos::Comm<Ordinal> > &comm)
: comm_(comm) {}
int batchID(void) {
return Teuchos::rank<Ordinal>(*comm_);
}
int numBatches(void) {
return Teuchos::size<Ordinal>(*comm_);
}
void reduceAll(Real* input, Real* output,
const Elementwise::ReductionOp<Real> &r) {
int nB = this->numBatches();
std::vector<Real> receiveBuffer(nB);
Teuchos::gather<Ordinal,Real>(input,1,&receiveBuffer[0],1,0,*comm_);
output[0] = r.initialValue();
for (int i = 0; i < nB; i++) {
r.reduce(receiveBuffer[i],output[0]);
}
Teuchos::broadcast<Ordinal,Real>(*comm_,0,1,output);
}
void minAll(Real* input, Real* output, int dim) {
Teuchos::reduceAll<Ordinal,Real>(*comm_,Teuchos::REDUCE_MIN,
dim, input, output);
}
void maxAll(Real* input, Real* output, int dim) {
Teuchos::reduceAll<Ordinal,Real>(*comm_,Teuchos::REDUCE_MAX,
dim, input, output);
}
void sumAll(Real* input, Real* output, int dim) {
Teuchos::reduceAll<Ordinal,Real>(*comm_,Teuchos::REDUCE_SUM,
dim, input, output);
}
void broadcast(Real* input, int cnt, int root) {
Teuchos::broadcast<Ordinal,Real>(*comm_,root,cnt,input);
}
virtual void sumAll(Vector<Real> &input, Vector<Real> &output) {
TEUCHOS_TEST_FOR_EXCEPTION( true, std::invalid_argument,
">>> ERROR (ROL::TeuchosBatchManager): sumAll(Vector<Real> &input, Vector<Real> &output) is not implemented");
}
void barrier(void) {
Teuchos::barrier<Ordinal>(*comm_);
}
};
}
#endif
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