MPI_Type_fromint(3)

✨ NAME ✨

MPI_Type_fromint — converts an integer handle to MPI_Type, bestie. This is from the MPI manual, page MPI_Type_fromint(3), and it's giving "tiny function, big energy" 💅.

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🫶 SYNOPSIS 🫶

MPI_Datatype MPI_Type_fromint(int datatype)

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🌸 INPUT PARAMETERS 🌸

• datatype — the datatype, and it's an integer bestie. That's the input, periodt. No cap, that's the whole parameter list 🎀.

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💖 THREAD AND INTERRUPT SAFETY 💖

Okay so this routine is thread-safe. What does that mean fr fr? It means this routine can be safely used by multiple threads at the same time, and you do not need any user-provided thread locks. Slay, no extra lock drama required ✨.

But listen — it is not interrupt safe. Usually that's because it uses memory allocation routines such as malloc, or other non-MPICH runtime routines, and those routines are themselves not interrupt-safe. So thread-safe? Yes. Interrupt-safe? NO. Don't get it twisted 😭💀.

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That's the whole page, bestie. Footer tea for the very end: this is the MPI manual's MPI_Type_fromint(3) page, dated 4/10/2026. Byeee, go convert those integer handles responsibly 🦋💜✨