MPI_Op_fromint(3)

💖 NAME 💖

okay so bestie, MPI_Op_fromint — it literally converts an integer handle to an MPI_Op. that's the whole gig. no cap. 🎀

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✨ SYNOPSIS ✨

MPI_Op MPI_Op_fromint(int op)

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🫶 INPUT PARAMETERS 🫶

• op — the op, and it's an integer, babe. that's it, that's the input. 💅

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🔥 THREAD AND INTERRUPT SAFETY 🔥

good news first: this routine is thread-safe. periodt. that means you can absolutely let multiple threads hit it at the same time and you do not need to bring your own thread locks — no user-provided locking required, she handles herself. main character energy fr fr. 👑

but like… she is not interrupt safe. 😭 and that's usually because of memory allocation routines — think malloc, or other non-MPICH runtime routines that aren't interrupt-safe themselves. so if you interrupt her mid-glow-up, that's on you bestie. 💀

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and that's the whole page, bestie!! you ate that 💖 remember: integer handle in, MPI_Op out, threads are chill, interrupts are not. iykyk 🦋

mwah 💋 — this came straight out of the MPI manual, dated 4/10/2026, and yes the page itself is called MPI_Op_fromint(3) in case anyone asks. slay. ✨🌈