NAME¶

MPI_Request_f2c - UNKNOWN

MPI_Comm_f2c <#mpi-comm-f2c>, MPI_Comm_c2f <#mpi-comm-c2f>, MPI_Errhandler_f2c <#mpi-errhandler-f2c>, MPI_Errhandler_c2f <#mpi-errhandler-c2f>, MPI_File_f2c <#mpi-file-f2c>, MPI_File_c2f <#mpi-file-c2f>, MPI_Group_f2c <#mpi-group-f2c>, MPI_Group_c2f <#mpi-group-c2f>, MPI_Info_f2c <#mpi-info-f2c>, MPI_Info_c2f <#mpi-info-c2f>, MPI_Message_f2c <#mpi-message-f2c>, MPI_Message_c2f <#mpi-message-c2f>, MPI_Op_f2c <#mpi-op-f2c>, MPI_Op_c2f <#mpi-op-c2f>, MPI_Request_f2c, MPI_Request_c2f <#mpi-request-c2f>, MPI_Session_f2c <#mpi-session-f2c>, MPI_Session_c2f <#mpi-session-c2f>, MPI_Status_f2c <#mpi-status-f2c>, MPI_Status_c2f <#mpi-status-c2f>, MPI_Type_f2c <#mpi-type-f2c>, MPI_Type_c2f <#mpi-type-c2f>, MPI_Win_f2c <#mpi-win-f2c>, MPI_Win_c2f <#mpi-win-c2f> - Translates a C handle into a Fortran handle, or vice versa.

DESCRIPTION¶

Handles are passed between Fortran and C by using an explicit C wrapper to convert Fortran handles to C handles. There is no direct access to C handles in Fortran. The type definition MPI_Fint is provided in C for an integer of the size that matches a Fortran INTEGER; usually, MPI_Fint will be equivalent to int. The handle translation functions are provided in C to convert from a Fortran handle (which is an integer) to a C handle, and vice versa.

For example, if comm is a valid Fortran handle to a communicator, then MPI_Comm_f2c <#mpi-comm-f2c> returns a valid C handle to that same communicator; if comm = MPI_COMM_NULL (Fortran value), then MPI_Comm_f2c <#mpi-comm-f2c> returns a null C handle; if comm is an invalid Fortran handle, then MPI_Comm_f2c <#mpi-comm-f2c> returns an invalid C handle.

NOTES¶

These functions are only available in C; they are not available in any of the Fortran MPI interfaces.

This function does not return an error value. Consequently, the result of calling it before MPI_Init <#mpi-init> or after MPI_Finalize <#mpi-finalize> is undefined.

Author¶

The Open MPI community

Copyright¶

2003-2026, The Open MPI Community