1 /*
2 * Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
3 * University Research and Technology
4 * Corporation. All rights reserved.
5 * Copyright (c) 2004-2005 The University of Tennessee and The University
6 * of Tennessee Research Foundation. All rights
7 * reserved.
8 * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
9 * University of Stuttgart. All rights reserved.
10 * Copyright (c) 2004-2005 The Regents of the University of California.
11 * All rights reserved.
12 * Copyright (c) 2015 Research Organization for Information Science
13 * and Technology (RIST). All rights reserved.
14 * $COPYRIGHT$
15 *
16 * Additional copyrights may follow
17 *
18 * $HEADER$
19 */
20
21 #include "ompi_config.h"
22
23 #include "ompi/mpi/c/bindings.h"
24 #include "ompi/runtime/params.h"
25 #include "ompi/communicator/communicator.h"
26 #include "ompi/errhandler/errhandler.h"
27 #include "ompi/runtime/mpiruntime.h"
28 #include "opal/threads/threads.h"
29
30 #if OMPI_BUILD_MPI_PROFILING
31 #if OPAL_HAVE_WEAK_SYMBOLS
32 #pragma weak MPI_Is_thread_main = PMPI_Is_thread_main
33 #endif
34 #define MPI_Is_thread_main PMPI_Is_thread_main
35 #endif
36
37 static const char FUNC_NAME[] = "MPI_Is_thread_main";
38
39
40 int MPI_Is_thread_main(int *flag)
41 {
42 OPAL_CR_NOOP_PROGRESS();
43
44 if (MPI_PARAM_CHECK) {
45 OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
46 if (NULL == flag) {
47 return OMPI_ERRHANDLER_INVOKE(MPI_COMM_WORLD, MPI_ERR_COMM, FUNC_NAME);
48 }
49 }
50
51 /* Compare this thread ID to the main thread ID */
52
53 *flag = (int) opal_thread_self_compare(ompi_mpi_main_thread);
54
55 return MPI_SUCCESS;
56 }