MPI_Win_fromint(3)

💖 MPI_Win_fromint(3) 💖

okay bestie so you found a page from the MPI manual and it's honestly a tiny little snack — like, one function, one job, and it delivers. no cap.

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✨ NAME ✨

MPI_Win_fromint — converts an integer handle to MPI_Win

like. that's it. that's the whole personality. it takes an int and hands you back a window handle, periodt. 👑

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🌸 SYNOPSIS 🌸

MPI_Win MPI_Win_fromint(int win)

look at that signature. so clean. so demure. 🎀

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🦋 INPUT PARAMETERS 🦋

• win — win (integer)

yeah bestie it's literally called win and it's literally an integer, the naming department ate and left no crumbs 💅

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💀 THREAD AND INTERRUPT SAFETY 💀

good news first: this routine is thread-safe. that means you can lowkey just call it from a bunch of threads at once and you do not need to bring your own thread locks. no user-provided locking, none, you're free 🌈

but now the ✨ plot twist ✨ — it is not interrupt safe. not even a little.

and why? typically because of memory allocation routines like malloc or other non-MPICH runtime routines, which are themselves not interrupt-safe. so if you're running around interrupting things while this is mid-malloc, that's on you bestie 😭

fr fr: thread-safe? yes. interrupt safe? absolutely not. do not play with that. 🙈

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okay that's the whole page, you're officially educated 💜 this was the MPI manual's take on MPI_Win_fromint(3), dated 4/10/2026 — same title on the way out as on the way in, which is honestly iconic of it. go forth and convert your integers. slay. 👑✨