qt_double_sum(3)

💖 qt_double_sum — libqthread's lil parallel addition squad 💖

okay bestie, so this is a page from libqthread (that's the manual name, mwah, we're being thorough), and it's all about three lil functions that add up a whole array for you, but make it ✨*parallel*✨.

✨ NAME ✨

qt_double_sum, qt_uint_sum, qt_int_sum — add up an array in parallel 🧮🦋

like... they sum. in parallel. that's the whole vibe check and they passed.

✨ SYNOPSIS ✨

#include <qthread/qloop.h>

double
qt_double_sum (double *array, size_t length, int checkfeb);

unsigned int
qt_uint_sum (unsigned int *array, size_t length, int checkfeb);

int
qt_int_sum (int *array, size_t length, int checkfeb);

✨ DESCRIPTION ✨

so here's the tea ☕ — these functions take an array of length numbers as input and return the sum of those numbers. simple, right? but the sum is computed in parallel by dividing the iterations evenly among the shepherds 🐑🐑🐑. yes bestie, shepherds, that's the whole libqthread thing, they're carrying your math on their backs and they are not complaining.

if checkfeb is non-zero, these functions will wait for the entries in the array to be full before adding them. patient queens. 💅

🚨 okay so important: they DO NOT check whether the array entries are properly aligned. not even a little. not even a glance. so if your alignment is off, that's on you, bestie, no cap. 🙈

✨ RETURN VALUE ✨

the sum of the first length entries of array. that's it, that's the gift 🎀.

✨ SEE ALSO ✨

the whole friend group, fr fr — go say hi to all of them:

• qt_double_prod(3)
• qt_double_max(3)
• qt_double_min(3)
• qt_uint_prod(3)
• qt_uint_max(3)
• qt_uint_min(3)
• qt_int_prod(3)
• qt_int_max(3)
• qt_int_min(3)
• qt_loop(3)
• qt_loop_balance(3)
• qt_loopaccum_balance(3)

and that's the page, bestie!! this lil icon dropped back in JUNE 2007 from libqthread (she's been serving since before some of us could walk, iconic behavior 👑), and the page itself goes by qt_double_sum(3). mwah, slay, go sum something parallel 💖✨🌸