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MPI_Attr_put(3) MPI MPI_Attr_put(3) NAME MPI_Attr_put - Stores attribute value associated with a key SYNOPSIS int MPI_Attr_put(MPI_Comm comm, int keyval, void *attr_value) INPUT PARAMETERS comm - communicator to which attribute will be attached (handle) keyval - key value, as returned by MPI_KEYVAL_CREATE (integer) attribute_val - attribute value NOTES Values of the permanent attributes MPI_TAG_UB , MPI_HOST , MPI_IO , MPI_WTIME_IS_GLOBAL , MPI_UNIVERSE_SIZE , MPI_LASTUSEDCODE , and MPI_APPNUM may not be changed. The type of the attribute value depends on whether C, C++, or Fortran is being used. In C and C++, an attribute value is a pointer ( void * ); in Fortran, it is a single integer ( not a pointer, since Fortran has no pointers and there are systems for which a pointer does not fit in an integer (e.g., any > 32 bit address system that uses 64 bits for Fortran DOUBLE PRECISION ). If an attribute is already present, the delete function (specified when the corresponding keyval was created) will be called. 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. DEPRECATED FUNCTION The MPI-2 standard deprecated a number of routines because MPI-2 pro- vides better versions. This routine is one of those that was depre- cated. The routine may continue to be used, but new code should use the replacement routine. The replacement for this routine is MPI_Comm_set_attr . NOTES FOR FORTRAN All MPI routines in Fortran (except for MPI_WTIME and MPI_WTICK ) have an additional argument ierr at the end of the argument list. ierr is an integer and has the same meaning as the return value of the routine in C. In Fortran, MPI routines are subroutines, and are invoked with the call statement. All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in Fortran. 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 com- municators), MPI_File_set_errhandler (for files), and MPI_Win_set_er- rhandler (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 when- ever possible. MPI_SUCCESS - No error; MPI routine completed successfully. MPI_ERR_COMM - Invalid communicator. A common error is to use a null commu- nicator in a call (not even allowed in MPI_Comm_rank ). MPI_ERR_KEYVAL - Invalid keyval MPI_ERR_ARG - This error class is associated with an error code that indi- cates that an attempt was made to free one of the permanent keys. SEE ALSO MPI_Attr_get, MPI_Keyval_create, MPI_Attr_delete, MPI_Comm_set_attr LOCATION src/mpi/attr/attr_put.c 9/20/2012 MPI_Attr_put(3)
NAME | SYNOPSIS | INPUT PARAMETERS | NOTES | THREAD AND INTERRUPT SAFETY | DEPRECATED FUNCTION | NOTES FOR FORTRAN | ERRORS | SEE ALSO | LOCATION
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