17.2.409. MPI_T_cvar_handle_alloc

MPI_T_cvar_handle_alloc, MPI_T_cvar_handle_free - Allocate/free control variable handles

17.2.409.1. 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.

17.2.409.2. NOTES

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

17.2.409.3. 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