NAME

       MPI_T_cvar_get_info -  Get the information about a control variable

SYNOPSIS

       int MPI_T_cvar_get_info(int cvar_index, char *name, int *name_len,
       int *verbosity, MPI_Datatype * datatype, MPI_T_enum * enumtype,
       char *desc, int *desc_len, int *binding, int *scope)

INPUT/OUTPUT PARAMETERS

       name_len
              - length of the string and/or buffer for name (integer)
       desc_len
              - length of the string and/or buffer for desc (integer)

INPUT PARAMETERS

       cvar_index
              - index of the control variable to be queried, value between 0 and num_cvar-1 (integer)

OUTPUT PARAMETERS

       name   - buffer to return the string containing the name of the control variable (string)
       verbosity
              - verbosity level of this variable (integer)
       datatype
              - MPI datatype of the information stored in the control variable (handle)
       enumtype
              - optional descriptor for enumeration information (handle)
       desc   - buffer to return the string containing a description of the control variable (string)
       binding
              - type of MPI object this variable is associated with
       scope  - scope of when changes to this variable are possible (integer)

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.
       MPI_T_ERR_NOT_INITIALIZED
              - The MPI tool information interface is not initialized.
       MPI_T_ERR_INVALID_INDEX
              - Index is invalid or has been deleted.

                                                   11/12/2019                             MPI_T_cvar_get_info(3)