MPI_Session_fromint(3)

💖 MPI_Session_fromint(3) 💖

okay so bestie, we're in the MPI section of the manual, and today's main character is MPI_Session_fromint(3) — yes, the whole page, and yes, she's iconic. this one is short and sweet but she's important, so let's get into it 🎀

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✨ NAME ✨

MPI_Session_fromint — converts an integer handle to MPI_Session

like literally, that's the whole job. int goes in, session comes out. slay 💅

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🌈 SYNOPSIS 🌈

MPI_Session MPI_Session_fromint(int session)

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🫶 INPUT PARAMETERS 🫶

• session — session (integer). that's it. that's the input. she's a lil integer holding a handle and we're turning her into a full-on MPI_Session. no cap.

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🔥 THREAD AND INTERRUPT SAFETY 🔥

okay this part matters so pay attention bestie, because this is the safety girlie section and she does not play 💀

This routine is thread-safe. what does that mean fr fr? it means this routine may be safely used by multiple threads without the need for any user-provided thread locks. several threads can vibe with it at the same time, no extra locking from you required. periodt. 🧚

However, the routine is not interrupt safe. typically, this is due to the use of memory allocation routines such as malloc or other non-MPICH runtime routines that are themselves not interrupt-safe. so like — thread-safe, yes; interrupt-safe, absolutely not. do not test her on that one 🙈

⚠️ warning bestie: not interrupt safe. malloc and friends are the culprits, and they are not interrupt-safe either. keep that in mind and you'll be fine 💖

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and that's the whole page, you ate that 💅✨

sign-off time: this lil masterpiece lives in the MPI manual, dated 4/10/2026, and it's filed under MPI_Session_fromint(3) — go forth and convert those integer handles, bestie, ily 🫶💖🌸