MPI_T_cvar_handle_alloc - Allocate/free contol variable handles

NAME SYNTAX C Syntax DESCRIPTION NOTES ERRORS SEE ALSO

NAME

MPI_T_cvar_handle_alloc, MPI_T_cvar_handle_free − Allocate/free contol variable handles

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)

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