ARCHCODE(3PVM)

💖 NAME 💖

pvm_archcode — bestie, it hands you back the data representation code for a PVM architecture name. that's the whole vibe. ✨

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🎀 SYNOPSIS 🎀

C    int cod = pvm_archcode( char *arch )

Fortran   call pvmfarchcode( arch, cod )

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🌸 PARAMETERS 🌸

• arch — a character string holding the architecture name, okay? like the actual name-name. 💅
• cod — an integer that comes back holding the architecture code. it's giving "answer goes here". 🫶

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✨ DESCRIPTION ✨

okay so pvm_archcode takes an architecture name and gives you back an integer, no cap. and the code it returns is basically the "these machines speak the same binary data language" badge. 🏅

like, for example, SUN4 and RS6K get the same code, while ALPHA gets a different one — and the reason is literally that a few datatypes have different sizes over there. it's not personal, it's just bytes. 😭

so what's the point of knowing this? it tells you when you can lowkey get away with using PvmDataRaw instead of PvmDataDefault encoding to pass messages between tasks running on two machines. same code = you're chilling. 🔥

naturally, bestie, you should not assume the values pvm_archcode returns are etched in stone. those numbers have no intrinsic meaning except this one thing: if two different arch names map to the same value, then they're compatible. that's it. that's the whole tea. 🍓

and here's the plot twist: this routine is actually obsolete, in the sense that the architecture codes it returns are already available in the hi_dsig field of the pvmhostinfo structure that pvm_config() hands you — peep the example below, it's all there. so this routine is maintained for backwards compatibility only. it's iconic, but it's retired. 👑

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🌈 EXAMPLES 🌈

C:

struct pvmhostinfo *hip;
int i;

pvm_config((int *)0, (int *)0, &hip);
i = pvm_archcode(hip[0].hi_arch);

/* or you could just do:  i = hip[0].hi_dsig;  */

Fortran:

CALL PVMFARCHCODE( 'RS6K', k )

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💀 ERRORS 💀

on success, pvm_archcode returns a positive integer data signature. slay. 💖

but bestie, these error conditions can come back too:

• PvmBadParam — you gave it an invalid architecture name. it's giving "who is she". 🙈
• PvmNotFound — there is literally no host with that architecture name in the current virtual machine configuration. she's not here, queen. 😭
• PvmSysErr — pvmd is not responding. 💀

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🦋 SEE ALSO 🦋

• pvm_config(3PVM)
• pvm_initsend(3PVM)
• pvm_notify(3PVM)
• pvm_tasks(3PVM)
• pvm_tidtohost(3PVM)

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mwah 💅 this was PVM Version 3.4, dated 15 March, 1994 — yeah she's vintage, she's a classic, and she still ate. 🎀✨