NAME

       MPI_T_init_thread -  Initialize the MPI_T execution environment

SYNOPSIS

       int MPI_T_init_thread(int required, int *provided)

INPUT PARAMETERS

       required
              - desired level of thread support (integer)

OUTPUT PARAMETERS

       provided
              - provided level of thread support (integer)

NOTES

THE VALID VALUES FOR THE LEVEL OF THREAD SUPPORT ARE

       MPI_THREAD_SINGLE
              - Only one thread will execute.
       MPI_THREAD_FUNNELED
              - The process may be multi-threaded, but only the main thread will make MPI_T calls
              (all MPI_T calls are funneled to the main thread).
       MPI_THREAD_SERIALIZED
              - The process may be multi-threaded, and multiple threads may make MPI_T calls, but
              only one at a time: MPI_T calls are not made concurrently from two distinct threads
              (all MPI_T calls are serialized).
       MPI_THREAD_MULTIPLE
              - Multiple threads may call MPI_T, with no restrictions.

THREAD AND INTERRUPT SAFETY

       This routine is thread-safe.  This means that this routine may be safely used by  multiple
       threads  without the need for any user-provided thread locks.  However, the routine is not
       interrupt safe.  Typically, this is due to the use of memory allocation routines  such  as
       malloc or other non-MPICH runtime routines that are themselves not interrupt-safe.

ERRORS

       All  MPI  routines  (except MPI_Wtime and MPI_Wtick ) return an error value; C routines as
       the value of the function and Fortran routines in the last argument.  Before the value  is
       returned,  the current MPI error handler is called.  By default, this error handler aborts
       the MPI  job.   The  error  handler  may  be  changed  with  MPI_Comm_set_errhandler  (for
       communicators),  MPI_File_set_errhandler  (for files), and MPI_Win_set_errhandler (for RMA
       windows).  The MPI-1 routine MPI_Errhandler_set may be used but  its  use  is  deprecated.
       The  predefined  error  handler  MPI_ERRORS_RETURN may be used to cause error values to be
       returned.  Note that MPI does not guarentee that an  MPI  program  can  continue  past  an
       error; however, MPI implementations will attempt to continue whenever possible.

       MPI_SUCCESS
              - No error; MPI routine completed successfully.

SEE ALSO

       MPI_T_finalize

                                            11/12/2016                       MPI_T_init_thread(3)