MPI_WIN_GET_NAME(3)

💖 MPI_Win_get_name(3) — an Open MPI moment 💖

okay so bestie, this is the Open MPI manual page for MPI_Win_get_name, and literally all it does is tell you the name of a window. That's it. That's the whole vibe. But we're gonna do it properly, no cap. 🎀

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✨ NAME ✨

MPI_Win_get_name — obtains the name of a window. that's the whole thing, she's simple, she's iconic, she's a getter. 💅

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🌸 SYNTAX 🌸

💜 C Syntax

#include <mpi.h>

int MPI_Win_get_name(MPI_Win win, char *win_name, int *resultlen)

🦋 Fortran Syntax

USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_WIN_GET_NAME(WIN, WIN_NAME, RESULTLEN, IERROR)
     INTEGER WIN, RESULTLEN, IERROR
     CHARACTER*(*) WIN_NAME

🌈 Fortran 2008 Syntax

USE mpi_f08
MPI_Win_get_name(win, win_name, resultlen, ierror)
     TYPE(MPI_Win), INTENT(IN) :: win
     CHARACTER(LEN=MPI_MAX_OBJECT_NAME), INTENT(OUT) :: win_name
     INTEGER, INTENT(OUT) :: resultlen
     INTEGER, OPTIONAL, INTENT(OUT) :: ierror

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🫶 INPUT PARAMETER 🫶

• win — the window whose name is to be returned (handle). like, which window are we naming, bestie? point at her. 👉✨

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⭐ OUTPUT PARAMETERS ⭐

• win_name — the name previously stored on the window, or an empty string if no such name exists (string). so if nobody ever named her, you get "" and that's just how it is, don't take it personally 🥲
• resultlen — length of returned name (integer). the character count, so you know how much of your buffer is actually doing something 💫
• ierror — Fortran only: error status (integer). Fortran girlies get their own lil error slot, C girlies have to read the return value. life is unfair, moving on. 🙈

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💀 DESCRIPTION 💀

she's empty. the DESCRIPTION section on this page literally has nothing in it. not a single word. the silence is loud, ngl. I'm not gonna make stuff up to fill it because that's not the assignment — this page said what it said, and what it said was nothing. 🤐✨

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🔥 ERRORS 🔥

okay this is the chunky part, bestie, so buckle up. almost all MPI routines return an error value — C routines as the return result of the function, and Fortran routines in the last argument. know that, live by that. 💯

Before the error value is returned, the current MPI error handler associated with the communication object (e.g., communicator, window, file) is called. If no communication object is associated with the MPI call, then the call is considered attached to MPI_COMM_SELF and will call the associated MPI error handler. When MPI_COMM_SELF is not initialized (i.e., before MPI_Init/MPI_Init_thread, after MPI_Finalize, or when using the Sessions Model exclusively) the error raises the initial error handler. The initial error handler can be changed by calling MPI_Comm_set_errhandler on MPI_COMM_SELF when using the World model, or the mpi_initial_errhandler CLI argument to mpiexec or info key to MPI_Comm_spawn/MPI_Comm_spawn_multiple. If no other appropriate error handler has been set, then the MPI_ERRORS_RETURN error handler is called for MPI I/O functions and the MPI_ERRORS_ABORT error handler is called for all other MPI functions. 😤 (that's a lot of words but every one of them is load-bearing, don't skip.)

Open MPI includes three predefined error handlers that can be used:

• MPI_ERRORS_ARE_FATAL — causes the program to abort all connected MPI processes. everyone's leaving the party. all of them. 🔥💀
• MPI_ERRORS_ABORT — an error handler that can be invoked on a communicator, window, file, or session. When called on a communicator, it acts as if MPI_Abort was called on that communicator. If called on a window or file, acts as if MPI_Abort was called on a communicator containing the group of processes in the corresponding window or file. If called on a session, aborts only the local process. so it's Abort but with ✨scope✨ — very main character energy 👑
• MPI_ERRORS_RETURN — returns an error code to the application. the chill one. she just hands you the code and lets you deal. 🫶

MPI applications can also implement their own error handlers by calling:

• MPI_Comm_create_errhandler then MPI_Comm_set_errhandler
• MPI_File_create_errhandler then MPI_File_set_errhandler
• MPI_Session_create_errhandler then MPI_Session_set_errhandler or at MPI_Session_init
• MPI_Win_create_errhandler then MPI_Win_set_errhandler

Note that MPI does not guarantee that an MPI program can continue past an error. so like, don't assume you can just vibe through it, okay? 😭

See the MPI man page for a full list of MPI error codes.

See the Error Handling section of the MPI-3.1 standard for more information.

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🎀 COPYRIGHT 🎀

2003-2026, The Open MPI Community. they've been at this a minute, respect. 💜

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and that's the whole page, bestie — literally all of it, nothing skipped. it's MPI_WIN_GET_NAME(3), Sep 11, 2026, Open MPI, and she ate. no crumbs. periodt. 🦋💅✨