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Teuchos_GlobalMPISession.hpp
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41 
42 #ifndef TEUCHOS_GLOBAL_MPI_SESSION_HPP
43 #define TEUCHOS_GLOBAL_MPI_SESSION_HPP
44 
50 #include "TeuchosCore_ConfigDefs.hpp"
51 
52 #include "Teuchos_ArrayView.hpp"
53 
54 
55 namespace Teuchos {
56 
66 //
113 class TEUCHOSCORE_LIB_DLL_EXPORT GlobalMPISession
114 {
115 public:
116 
118 
119 
162  GlobalMPISession( int* argc, char*** argv, std::ostream *out = &std::cout );
163 
165  ~GlobalMPISession();
166 
168 
170 
171 
176  static void abort();
177 
179 
180 
188  static bool mpiIsInitialized();
189 
195  static bool mpiIsFinalized();
196 
207  static int getRank();
208 
219  static int getNProc();
220 
229  static void barrier();
230 
247  static int sum(int localVal);
248 
264  static void allGather(int localVal, const ArrayView<int> &allVals);
265 
266 #ifdef HAVE_TEUCHOSCORE_KOKKOSCORE
267  static std::vector<std::string> getArgv ();
275 #endif // HAVE_TEUCHOSCORE_KOKKOSCORE
276 
277 
278 private:
279 
280  static bool haveMPIState_;
281  static bool mpiIsFinalized_;
282  static int rank_;
283  static int nProc_;
284 #ifdef HAVE_TEUCHOSCORE_KOKKOSCORE
285  static std::vector<std::string> argvCopy_;
293 #endif // HAVE_TEUCHOSCORE_KOKKOSCORE
294 
295  static void initialize( std::ostream *out );
296 
297  static void justInTimeInitialize();
298 
299 };
300 
301 } // namespace Teuchos
302 
303 #endif // TEUCHOS_GLOBAL_MPI_SESSION_HPP
Initialize, finalize, and query the global MPI session.