xref: /petsc/src/sys/mpiuni/mpi.c (revision 8efa2a282cafb3126d64e7372c7c93ad3b71bda1)
1 /*
2       This provides a few of the MPI-uni functions that cannot be implemented
3     with C macros
4 */
5 #include <mpiuni/mpi.h>
6 #if !defined(__MPIUNI_H)
7 #error "Wrong mpi.h included! require mpi.h from MPIUNI"
8 #endif
9 #if !defined(PETSC_STDCALL)
10 #define PETSC_STDCALL
11 #endif
12 #include <stdio.h>
13 #if defined(PETSC_HAVE_STDLIB_H)
14 #include <stdlib.h>
15 #endif
16 
17 #define MPI_SUCCESS 0
18 #define MPI_FAILURE 1
19 void    *MPIUNI_TMP        = 0;
20 int     MPIUNI_DATASIZE[10] = {sizeof(int),sizeof(float),sizeof(double),2*sizeof(double),sizeof(char),2*sizeof(int),4*sizeof(double),4,8,2*sizeof(double)};
21 /*
22        With MPI Uni there is only one communicator, which is called 1.
23 */
24 #define MAX_ATTR 128
25 
26 typedef struct {
27   void                *extra_state;
28   void                *attribute_val;
29   int                 active;
30   MPI_Delete_function *del;
31 } MPI_Attr;
32 
33 static MPI_Attr attr[MAX_ATTR];
34 static int      num_attr = 1,mpi_tag_ub = 100000000;
35 
36 #if defined(__cplusplus)
37 extern "C" {
38 #endif
39 
40 /*
41    To avoid problems with prototypes to the system memcpy() it is duplicated here
42 */
43 int MPIUNI_Memcpy(void *a,const void* b,int n) {
44   int  i;
45   char *aa= (char*)a;
46   char *bb= (char*)b;
47 
48   for (i=0; i<n; i++) aa[i] = bb[i];
49   return 0;
50 }
51 
52 /*
53    Used to set the built-in MPI_TAG_UB attribute
54 */
55 static int Keyval_setup(void)
56 {
57   attr[0].active        = 1;
58   attr[0].attribute_val = &mpi_tag_ub;
59   return 0;
60 }
61 
62 int MPI_Keyval_create(MPI_Copy_function *copy_fn,MPI_Delete_function *delete_fn,int *keyval,void *extra_state)
63 {
64   if (num_attr >= MAX_ATTR) MPI_Abort(MPI_COMM_WORLD,1);
65 
66   attr[num_attr].extra_state = extra_state;
67   attr[num_attr].del         = delete_fn;
68   *keyval                    = num_attr++;
69   return 0;
70 }
71 
72 int MPI_Keyval_free(int *keyval)
73 {
74   attr[*keyval].active = 0;
75   return MPI_SUCCESS;
76 }
77 
78 int MPI_Attr_put(MPI_Comm comm,int keyval,void *attribute_val)
79 {
80   attr[keyval].active        = 1;
81   attr[keyval].attribute_val = attribute_val;
82   return MPI_SUCCESS;
83 }
84 
85 int MPI_Attr_delete(MPI_Comm comm,int keyval)
86 {
87   if (attr[keyval].active && attr[keyval].del) {
88     void* save_attribute_val   = attr[keyval].attribute_val;
89     attr[keyval].active        = 0;
90     attr[keyval].attribute_val = 0;
91     (*(attr[keyval].del))(comm,keyval,save_attribute_val,attr[keyval].extra_state);
92   }
93   return MPI_SUCCESS;
94 }
95 
96 int MPI_Attr_get(MPI_Comm comm,int keyval,void *attribute_val,int *flag)
97 {
98   if (!keyval) Keyval_setup();
99   *flag                   = attr[keyval].active;
100   *(void **)attribute_val = attr[keyval].attribute_val;
101   return MPI_SUCCESS;
102 }
103 
104 int MPI_Comm_create(MPI_Comm comm,MPI_Group group,MPI_Comm *newcomm)
105 {
106   *newcomm =  comm;
107   return MPI_SUCCESS;
108 }
109 
110 static int dups = 0;
111 int MPI_Comm_dup(MPI_Comm comm,MPI_Comm *out)
112 {
113   *out = comm;
114   dups++;
115   return 0;
116 }
117 
118 int MPI_Comm_free(MPI_Comm *comm)
119 {
120   int i;
121 
122   if (--dups) return MPI_SUCCESS;
123   for (i=0; i<num_attr; i++) {
124     if (attr[i].active && attr[i].del) {
125       (*attr[i].del)(*comm,i,attr[i].attribute_val,attr[i].extra_state);
126     }
127     attr[i].active = 0;
128   }
129   return MPI_SUCCESS;
130 }
131 
132 int MPI_Abort(MPI_Comm comm,int errorcode)
133 {
134   abort();
135   return MPI_SUCCESS;
136 }
137 
138 /* --------------------------------------------------------------------------*/
139 
140 static int MPI_was_initialized = 0;
141 static int MPI_was_finalized   = 0;
142 
143 int MPI_Init(int *argc, char ***argv)
144 {
145   if (MPI_was_initialized) return 1;
146   if (MPI_was_finalized) return 1;
147   MPI_was_initialized = 1;
148   return 0;
149 }
150 
151 int MPI_Finalize(void)
152 {
153   if (MPI_was_finalized) return 1;
154   if (!MPI_was_initialized) return 1;
155   MPI_was_finalized = 1;
156   return 0;
157 }
158 
159 int MPI_Initialized(int *flag)
160 {
161   *flag = MPI_was_initialized;
162   return 0;
163 }
164 
165 int MPI_Finalized(int *flag)
166 {
167   *flag = MPI_was_finalized;
168   return 0;
169 }
170 
171 /* -------------------     Fortran versions of several routines ------------------ */
172 
173 #if defined(PETSC_HAVE_FORTRAN_CAPS)
174 #define mpi_init_             MPI_INIT
175 #define mpi_finalize_         MPI_FINALIZE
176 #define mpi_comm_size_        MPI_COMM_SIZE
177 #define mpi_comm_rank_        MPI_COMM_RANK
178 #define mpi_abort_            MPI_ABORT
179 #define mpi_reduce_           MPI_REDUCE
180 #define mpi_allreduce_        MPI_ALLREDUCE
181 #define mpi_barrier_          MPI_BARRIER
182 #define mpi_bcast_            MPI_BCAST
183 #define mpi_gather_           MPI_GATHER
184 #define mpi_allgather_        MPI_ALLGATHER
185 #define mpi_comm_split_       MPI_COMM_SPLIT
186 #define mpi_scan_             MPI_SCAN
187 #define mpi_send_             MPI_SEND
188 #define mpi_recv_             MPI_RECV
189 #define mpi_reduce_scatter_   MPI_REDUCE_SCATTER
190 #define mpi_irecv_            MPI_IRECV
191 #define mpi_isend_            MPI_ISEND
192 #define mpi_sendrecv_         MPI_SENDRECV
193 #define mpi_test_             MPI_TEST
194 #define mpi_waitall_          MPI_WAITALL
195 #define mpi_waitany_          MPI_WAITANY
196 #define mpi_allgatherv_       MPI_ALLGATHERV
197 #define mpi_alltoallv_        MPI_ALLTOALLV
198 #define mpi_comm_create_      MPI_COMM_CREATE
199 #define mpi_address_          MPI_ADDRESS
200 #define mpi_pack_             MPI_PACK
201 #define mpi_unpack_           MPI_UNPACK
202 #define mpi_pack_size_        MPI_PACK_SIZE
203 #define mpi_type_struct_      MPI_TYPE_STRUCT
204 #define mpi_type_commit_      MPI_TYPE_COMMIT
205 #define mpi_wtime_            MPI_WTIME
206 #define mpi_cancel_           MPI_CANCEL
207 #define mpi_comm_dup_         MPI_COMM_DUP
208 #define mpi_comm_free_        MPI_COMM_FREE
209 #define mpi_get_count_        MPI_GET_COUNT
210 #define mpi_get_processor_name_ MPI_GET_PROCESSOR_NAME
211 #define mpi_initialized_      MPI_INITIALIZED
212 #define mpi_iprobe_           MPI_IPROBE
213 #define mpi_probe_            MPI_PROBE
214 #define mpi_request_free_     MPI_REQUEST_FREE
215 #define mpi_ssend_            MPI_SSEND
216 #define mpi_wait_             MPI_WAIT
217 #define mpi_comm_group_       MPI_COMM_GROUP
218 #define mpi_exscan_           MPI_EXSCAN
219 #elif !defined(PETSC_HAVE_FORTRAN_UNDERSCORE)
220 #define mpi_init_             mpi_init
221 #define mpi_finalize_         mpi_finalize
222 #define mpi_comm_size_        mpi_comm_size
223 #define mpi_comm_rank_        mpi_comm_rank
224 #define mpi_abort_            mpi_abort
225 #define mpi_reduce_           mpi_reduce
226 #define mpi_allreduce_        mpi_allreduce
227 #define mpi_barrier_          mpi_barrier
228 #define mpi_bcast_            mpi_bcast
229 #define mpi_gather_           mpi_gather
230 #define mpi_allgather_        mpi_allgather
231 #define mpi_comm_split_       mpi_comm_split
232 #define mpi_scan_             mpi_scan
233 #define mpi_send_             mpi_send
234 #define mpi_recv_             mpi_recv
235 #define mpi_reduce_scatter_   mpi_reduce_scatter
236 #define mpi_irecv_            mpi_irecv
237 #define mpi_isend_            mpi_isend
238 #define mpi_sendrecv_         mpi_sendrecv
239 #define mpi_test_             mpi_test
240 #define mpi_waitall_          mpi_waitall
241 #define mpi_waitany_          mpi_waitany
242 #define mpi_allgatherv_       mpi_allgatherv
243 #define mpi_alltoallv_        mpi_alltoallv
244 #define mpi_comm_create_      mpi_comm_create
245 #define mpi_address_          mpi_address
246 #define mpi_pack_             mpi_pack
247 #define mpi_unpack_           mpi_unpack
248 #define mpi_pack_size_        mpi_pack_size
249 #define mpi_type_struct_      mpi_type_struct
250 #define mpi_type_commit_      mpi_type_commit
251 #define mpi_wtime_            mpi_wtime
252 #define mpi_cancel_           mpi_cancel
253 #define mpi_comm_dup_         mpi_comm_dup
254 #define mpi_comm_free_        mpi_comm_free
255 #define mpi_get_count_        mpi_get_count
256 #define mpi_get_processor_name_ mpi_get_processor_name
257 #define mpi_initialized_      mpi_initialized
258 #define mpi_iprobe_           mpi_iprobe
259 #define mpi_probe_            mpi_probe
260 #define mpi_request_free_     mpi_request_free
261 #define mpi_ssend_            mpi_ssend
262 #define mpi_wait_             mpi_wait
263 #define mpi_comm_group_       mpi_comm_group
264 #define mpi_exscan_           mpi_exscan
265 #endif
266 
267 #if defined(PETSC_HAVE_FORTRAN_UNDERSCORE_UNDERSCORE)
268 #define mpi_init_             mpi_init__
269 #define mpi_finalize_         mpi_finalize__
270 #define mpi_comm_size_        mpi_comm_size__
271 #define mpi_comm_rank_        mpi_comm_rank__
272 #define mpi_abort_            mpi_abort__
273 #define mpi_reduce_           mpi_reduce__
274 #define mpi_allreduce_        mpi_allreduce__
275 #define mpi_barrier_          mpi_barrier__
276 #define mpi_bcast_            mpi_bcast__
277 #define mpi_gather_           mpi_gather__
278 #define mpi_allgather_        mpi_allgather__
279 #define mpi_comm_split_       mpi_comm_split__
280 #define mpi_scan_             mpi_scan__
281 #define mpi_send_             mpi_send__
282 #define mpi_recv_             mpi_recv__
283 #define mpi_reduce_scatter_   mpi_reduce_scatter__
284 #define mpi_irecv_            mpi_irecv__
285 #define mpi_isend_            mpi_isend__
286 #define mpi_sendrecv_         mpi_sendrecv__
287 #define mpi_test_             mpi_test__
288 #define mpi_waitall_          mpi_waitall__
289 #define mpi_waitany_          mpi_waitany__
290 #define mpi_allgatherv_       mpi_allgatherv__
291 #define mpi_alltoallv_        mpi_alltoallv__
292 #define mpi_comm_create_      mpi_comm_create__
293 #define mpi_address_          mpi_address__
294 #define mpi_pack_             mpi_pack__
295 #define mpi_unpack_           mpi_unpack__
296 #define mpi_pack_size_        mpi_pack_size__
297 #define mpi_type_struct_      mpi_type_struct__
298 #define mpi_type_commit_      mpi_type_commit__
299 #define mpi_wtime_            mpi_wtime__
300 #define mpi_cancel_           mpi_cancel__
301 #define mpi_comm_dup_         mpi_comm_dup__
302 #define mpi_comm_free_        mpi_comm_free__
303 #define mpi_get_count_        mpi_get_count__
304 #define mpi_get_processor_name_ mpi_get_processor_name__
305 #define mpi_initialized_      mpi_initialized__
306 #define mpi_iprobe_           mpi_iprobe__
307 #define mpi_probe_            mpi_probe__
308 #define mpi_request_free_     mpi_request_free__
309 #define mpi_ssend_            mpi_ssend__
310 #define mpi_wait_             mpi_wait__
311 #define mpi_comm_group_       mpi_comm_group__
312 #define mpi_exscan_           mpi_exscan__
313 #endif
314 
315 
316 /* Do not build fortran interface if MPI namespace colision is to be avoided */
317 #if !defined(MPIUNI_AVOID_MPI_NAMESPACE)
318 
319 void PETSC_STDCALL  mpi_init_(int *ierr)
320 {
321   *ierr = MPI_Init((int*)0, (char***)0);
322 }
323 
324 void PETSC_STDCALL  mpi_finalize_(int *ierr)
325 {
326   *ierr = MPI_Finalize();
327 }
328 
329 void PETSC_STDCALL mpi_comm_size_(MPI_Comm *comm,int *size,int *ierr)
330 {
331   *size = 1;
332   *ierr = 0;
333 }
334 
335 void PETSC_STDCALL mpi_comm_rank_(MPI_Comm *comm,int *rank,int *ierr)
336 {
337   *rank=0;
338   *ierr=MPI_SUCCESS;
339 }
340 
341 void PETSC_STDCALL mpi_comm_split_(MPI_Comm *comm,int *color,int *key, MPI_Comm *newcomm, int *ierr)
342 {
343   *newcomm = *comm;
344   *ierr=MPI_SUCCESS;
345 }
346 
347 void PETSC_STDCALL mpi_abort_(MPI_Comm *comm,int *errorcode,int *ierr)
348 {
349   abort();
350   *ierr = MPI_SUCCESS;
351 }
352 
353 void PETSC_STDCALL mpi_reduce_(void *sendbuf,void *recvbuf,int *count,int *datatype,int *op,int *root,int *comm,int *ierr)
354 {
355   MPIUNI_Memcpy(recvbuf,sendbuf,(*count)*MPIUNI_DATASIZE[*datatype]);
356   *ierr = MPI_SUCCESS;
357 }
358 
359 void PETSC_STDCALL mpi_allreduce_(void *sendbuf,void *recvbuf,int *count,int *datatype,int *op,int *comm,int *ierr)
360 {
361   MPIUNI_Memcpy(recvbuf,sendbuf,(*count)*MPIUNI_DATASIZE[*datatype]);
362   *ierr = MPI_SUCCESS;
363 }
364 
365 void PETSC_STDCALL mpi_barrier_(MPI_Comm *comm,int *ierr)
366 {
367   *ierr = MPI_SUCCESS;
368 }
369 
370 void PETSC_STDCALL mpi_bcast_(void *buf,int *count,int *datatype,int *root,int *comm,int *ierr)
371 {
372   *ierr = MPI_SUCCESS;
373 }
374 
375 
376 void PETSC_STDCALL mpi_gather_(void *sendbuf,int *scount,int *sdatatype, void* recvbuf, int* rcount, int* rdatatype, int *root,int *comm,int *ierr)
377 {
378   MPIUNI_Memcpy(recvbuf,sendbuf,(*scount)*MPIUNI_DATASIZE[*sdatatype]);
379   *ierr = MPI_SUCCESS;
380 }
381 
382 void PETSC_STDCALL mpi_allgather_(void *sendbuf,int *scount,int *sdatatype, void* recvbuf, int* rcount, int* rdatatype,int *comm,int *ierr)
383 {
384   MPIUNI_Memcpy(recvbuf,sendbuf,(*scount)*MPIUNI_DATASIZE[*sdatatype]);
385   *ierr = MPI_SUCCESS;
386 }
387 
388 void PETSC_STDCALL mpi_scan_(void *sendbuf,void *recvbuf,int *count,int *datatype,int *op,int *comm,int *ierr)
389 {
390   MPIUNI_Memcpy(recvbuf,sendbuf,(*count)*MPIUNI_DATASIZE[*datatype]);
391   *ierr = MPI_SUCCESS;
392 }
393 
394 void PETSC_STDCALL mpi_send_(void*buf,int *count,int *datatype,int *dest,int *tag,int *comm,int *ierr )
395 {
396   *ierr = MPI_Abort(MPI_COMM_WORLD,0);
397 }
398 
399 void PETSC_STDCALL mpi_recv_(void*buf,int *count,int *datatype,int *source,int *tag,int *comm,int status,int *ierr )
400 {
401   *ierr = MPI_Abort(MPI_COMM_WORLD,0);
402 }
403 
404 void PETSC_STDCALL mpi_reduce_scatter_(void*sendbuf,void*recvbuf,int *recvcounts,int *datatype,int *op,int *comm,int *ierr)
405 {
406   *ierr = MPI_Abort(MPI_COMM_WORLD,0);
407 }
408 
409 void PETSC_STDCALL mpi_irecv_(void*buf,int *count, int *datatype, int *source, int *tag, int *comm, int *request, int *ierr)
410 {
411   *ierr = MPI_Abort(MPI_COMM_WORLD,0);
412 }
413 
414 void PETSC_STDCALL mpi_isend_(void*buf,int *count,int *datatype,int *dest,int *tag,int *comm,int *request, int *ierr)
415 {
416   *ierr = MPI_Abort(MPI_COMM_WORLD,0);
417 }
418 
419 void PETSC_STDCALL mpi_sendrecv_(void*sendbuf,int *sendcount,int *sendtype,int *dest,int *sendtag,void*recvbuf,int *recvcount,int *recvtype,int *source,int *recvtag,int *comm,int *status,int *ierr)
420 {
421   MPIUNI_Memcpy(recvbuf,sendbuf,(*sendcount)*MPIUNI_DATASIZE[*sendtype]);
422   *ierr = MPI_SUCCESS;
423 }
424 
425 void PETSC_STDCALL mpi_test_(int *request,int *flag,int *status,int *ierr)
426 {
427   *ierr = MPI_Abort(MPI_COMM_WORLD,0);
428 }
429 
430 void PETSC_STDCALL mpi_waitall_(int *count,int *array_of_requests,int *array_of_statuses,int *ierr)
431 {
432   *ierr = MPI_SUCCESS;
433 }
434 
435   void PETSC_STDCALL mpi_waitany_(int *count,int *array_of_requests,int * index, int *status,int *ierr)
436 {
437   *ierr = MPI_SUCCESS;
438 }
439 
440 void PETSC_STDCALL mpi_allgatherv_(void*sendbuf,int *sendcount,int *sendtype,void*recvbuf,int *recvcounts,int *displs,int *recvtype,int *comm,int *ierr)
441 {
442   MPIUNI_Memcpy(recvbuf,sendbuf,(*sendcount)*MPIUNI_DATASIZE[*sendtype]);
443   *ierr = MPI_SUCCESS;
444 }
445 
446 void PETSC_STDCALL mpi_alltoallv_(void*sendbuf,int *sendcounts,int *sdispls,int *sendtype,void*recvbuf,int *recvcounts,int *rdispls,int *recvtype,int *comm,int *ierr)
447 {
448   MPIUNI_Memcpy(recvbuf,sendbuf,(*sendcounts)*MPIUNI_DATASIZE[*sendtype]);
449   *ierr = MPI_SUCCESS;
450 }
451 
452 void PETSC_STDCALL mpi_comm_create_(int *comm,int *group,int *newcomm,int *ierr)
453 {
454   *newcomm =  *comm;
455   *ierr = MPI_SUCCESS;
456 }
457 
458 void PETSC_STDCALL mpi_address_(void*location,MPIUNI_INTPTR *address,int *ierr)
459 {
460   *address =  (MPIUNI_INTPTR) location;
461   *ierr = MPI_SUCCESS;
462 }
463 
464 void PETSC_STDCALL mpi_pack_(void*inbuf,int *incount,int *datatype,void*outbuf,int *outsize,int *position,int *comm,int *ierr)
465 {
466   *ierr = MPI_Abort(MPI_COMM_WORLD,0);
467 }
468 
469 void PETSC_STDCALL mpi_unpack_(void*inbuf,int *insize,int *position,void*outbuf,int *outcount,int *datatype,int *comm,int *ierr)
470 {
471   *ierr = MPI_Abort(MPI_COMM_WORLD,0);
472 }
473 
474 void PETSC_STDCALL mpi_pack_size_(int *incount,int *datatype,int *comm,int *size,int *ierr)
475 {
476   *ierr = MPI_Abort(MPI_COMM_WORLD,0);
477 }
478 
479 void PETSC_STDCALL mpi_type_struct_(int *count,int *array_of_blocklengths,int * array_of_displaments,int *array_of_types,int *newtype,int *ierr)
480 {
481   *ierr = MPI_Abort(MPI_COMM_WORLD,0);
482 }
483 
484 void PETSC_STDCALL mpi_type_commit_(int *datatype,int *ierr)
485 {
486   *ierr = MPI_SUCCESS;
487 }
488 
489 double PETSC_STDCALL mpi_wtime_(void)
490 {
491   return 0.0;
492 }
493 
494 void PETSC_STDCALL mpi_cancel_(int *request,int *ierr)
495 {
496   *ierr = MPI_SUCCESS;
497 }
498 
499 void PETSC_STDCALL mpi_comm_dup_(int *comm,int *out,int *ierr)
500 {
501   *out = *comm;
502   *ierr = MPI_SUCCESS;
503 }
504 
505 void PETSC_STDCALL mpi_comm_free_(int *comm,int *ierr)
506 {
507   *ierr = MPI_SUCCESS;
508 }
509 
510 void PETSC_STDCALL mpi_get_count_(int *status,int *datatype,int *count,int *ierr)
511 {
512   *ierr = MPI_Abort(MPI_COMM_WORLD,0);
513 }
514 
515 /* duplicate from fortranimpl.h */
516 #if defined(PETSC_HAVE_FORTRAN_MIXED_STR_ARG)
517 #define PETSC_MIXED_LEN(len) ,int len
518 #define PETSC_END_LEN(len)
519 #else
520 #define PETSC_MIXED_LEN(len)
521 #define PETSC_END_LEN(len)   ,int len
522 #endif
523 
524 void PETSC_STDCALL mpi_get_processor_name_(char *name PETSC_MIXED_LEN(len),int *result_len,int *ierr PETSC_END_LEN(len))
525 {
526   MPIUNI_Memcpy(name,"localhost",9*sizeof(char));
527   *result_len = 9;
528   *ierr = MPI_SUCCESS;
529 }
530 
531 void PETSC_STDCALL mpi_initialized_(int *flag,int *ierr)
532 {
533   *flag = MPI_was_initialized;
534   *ierr = MPI_SUCCESS;
535 }
536 
537 void PETSC_STDCALL mpi_iprobe_(int *source,int *tag,int *comm,int *glag,int *status,int *ierr)
538 {
539   *ierr = MPI_SUCCESS;
540 }
541 
542 void PETSC_STDCALL mpi_probe_(int *source,int *tag,int *comm,int *flag,int *status,int *ierr)
543 {
544   *ierr = MPI_SUCCESS;
545 }
546 
547 void PETSC_STDCALL mpi_request_free_(int *request,int *ierr)
548 {
549   *ierr = MPI_SUCCESS;
550 }
551 
552 void PETSC_STDCALL mpi_ssend_(void*buf,int *count,int *datatype,int *dest,int *tag,int *comm,int *ierr)
553 {
554   *ierr = MPI_Abort(MPI_COMM_WORLD,0);
555 }
556 
557 void PETSC_STDCALL mpi_wait_(int *request,int *status,int *ierr)
558 {
559   *ierr = MPI_SUCCESS;
560 }
561 
562 void PETSC_STDCALL mpi_comm_group_(int*comm,int*group,int *ierr)
563 {
564   *ierr = MPI_SUCCESS;
565 }
566 
567 void PETSC_STDCALL mpi_exscan_(void*sendbuf,void*recvbuf,int*count,int*datatype,int*op,int*comm,int*ierr)
568 {
569   *ierr = MPI_SUCCESS;
570 }
571 
572 #endif /* MPIUNI_AVOID_MPI_NAMESPACE */
573 
574 #if defined(__cplusplus)
575 }
576 #endif
577