SETSBUF(3PVM)

💖 SETSBUF — okay bestie, let's talk send buffers 💖

So this is pvm_setsbuf, part of PVM Version 3.4, and it's literally just: switch the active send buffer. That's the whole vibe. One job. Slays it. ✨

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✨ NAME ✨

pvm_setsbuf — switches the active send buffer 🎀

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🌸 SYNOPSIS 🌸

C girlies, write it like this:

int oldbuf = pvm_setsbuf( int bufid )

Fortran girlies, it's giving:

call pvmfsetsbuf( bufid, oldbuf )

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🦋 PARAMETERS 🦋

• bufid — an Integer, bestie. It's the message buffer identifier for the new active send buffer. And listen, a value of 0 indicates the default receive buffer 👀 (yes fr, that's what it says).
• oldbuf — an Integer that comes back to you carrying the message buffer identifier for the previous active send buffer. She's the receipts 💅

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💜 DESCRIPTION 💜

Okay so here's the tea: pvm_setsbuf switches the active send buffer over to bufid and saves the previous active send buffer into oldbuf. Lowkey a handoff. 🤝

And if bufid is set to 0? Then the present active send buffer gets saved and no active send buffer exists. Periodt. That's just how it is.

You need this routine when you're managing multiple message buffers — like, the way that you wanna switch back and forth between two buffers? Iconic use case, honestly. One buffer could be sending info to a graphical interface while a second buffer could be sending data to other tasks in the application. Two moods, two buffers, one girlboss managing both. 👑

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⭐ EXAMPLES ⭐

C bestie:

sbuf1 = pvm_setsbuf( sbuf2 );

Fortran bestie:

CALL PVMFSETSBUF( NEWBUF, OLDBUF )

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💀 ERRORS 💀

Not to be dramatic but these error conditions can be returned by pvm_setsbuf:

• PvmBadParam — you gave it an invalid bufid. 🚩
• PvmNoSuchBuf — you tried to switch to a non-existent message buffer. She's not there, babe. 😭

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🌈 SEE ALSO 🌈

• pvm_setrbuf(3PVM) — the receive-buffer sibling, go say hi 🫶

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That's the whole page, no cap. Sending you so much love from PVM Version 3.4, dated 30 August, 1993 — yeah she's vintage, she's an icon, she's still out here switching buffers. Mwah. 💖✨🎀🦋