MPI_T_CVAR_HANDLE_FREE(3)

MPI_T_cvar_handle_alloc, MPI_T_cvar_handle_free - Allocate/free control variable handles

SYNTAX

  C Syntax

            #include <mpi.h>

            int MPI_T_cvar_handle_alloc(int cvar_index, void *obj_handle,
                                        MPI_T_cvar_handle *handle, int *count)

            int MPI_T_cvar_handle_free(MPI_T_cvar_handle *handle)

DESCRIPTION

MPI_T_cvar_handle_alloc binds the control variable specified in cvar_index to the MPI object specified in obj_handle. If MPI_T_cvar_get_info returns MPI_T_BIND_NO_OBJECT as the binding of the variable the obj_handle argument is ignored. The number of values represented by this control variable is returned in the count parameter. If the control variable represents a string then count will be the maximum length of the string.

MPI_T_cvar_handle_free frees a handle allocated by MPI_T_cvar_handle_alloc and sets the handle argument to MPI_T_CVAR_HANDLE_NULL.

NOTES

Open MPI does not currently support binding MPI objects to control variables so the obj_handle argument is always ignored.

ERRORS

MPI_T_cvar_handle_alloc will fail if:

    •   MPI_T_ERR_NOT_INITIALIZED: The MPI Tools interface not initialized

    •   MPI_T_ERR_INVALID_INDEX: The control variable index is invalid

    •   MPI_T_ERR_OUT_OF_HANDLES: No more handles available

MPI_T_cvar_handle_free will fail if:

    •   MPI_T_ERR_NOT_INITIALIZED: The MPI Tools interface not initialized

    •   MPI_T_ERR_INVALID_HANDLE: The handle is invalid

SEE ALSO:

            •   MPI_T_cvar_get_info

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