PTHREAD_B...TR_DESTROY(3P)

💖 PTHREAD_BARRIERATTR_DESTROY, PTHREAD_BARRIERATTR_INIT 💖

okay bestie, welcome to the POSIX Programmer's Manual ✨ this is that official standards-lore, and there's a lil disclaimer you need to know first:

Heads up! This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. 🙈

so like. it might not even exist on ur machine. vibe check accordingly. 🫶

---

🌸 NAME 🌸

pthread_barrierattr_destroy, pthread_barrierattr_init — destroy and initialize the barrier attributes object 💅

---

✨ SYNOPSIS ✨

#include <pthread.h>

int pthread_barrierattr_destroy(pthread_barrierattr_t *attr);
int pthread_barrierattr_init(pthread_barrierattr_t *attr);

---

🦋 DESCRIPTION 🦋

okay so pthread_barrierattr_destroy() shall destroy a barrier attributes object. and when we say destroyed, we mean it — a destroyed attr attributes object can be reinitialized using pthread_barrierattr_init(), but the results of otherwise referencing the object after it has been destroyed are undefined. 😭 no cap. an implementation may cause pthread_barrierattr_destroy() to set the object referenced by attr to an invalid value, so like, don't go poking at it after.

meanwhile pthread_barrierattr_init() shall initialize a barrier attributes object attr with the default value for all of the attributes defined by the implementation. fresh start, clean slate, main character energy. 👑

and if you call pthread_barrierattr_init() specifying an already initialized attr attributes object? the results are undefined. 💀 don't do it, bestie, it's giving double-init chaos.

here's the cute part tho: after a barrier attributes object has been used to initialize one or more barriers, any function affecting the attributes object (including destruction) shall not affect any previously initialized barrier. the barriers are safe, they're independent, they're thriving. 🌈

also the behavior is undefined if the value specified by the attr argument to pthread_barrierattr_destroy() does not refer to an initialized barrier attributes object. so like, pls pls pls make sure it's initialized. fr fr. 🙏

---

💜 RETURN VALUE 💜

if it goes well? the pthread_barrierattr_destroy() and pthread_barrierattr_init() functions shall return zero. 🎀 otherwise, an error number shall be returned to indicate the error. that's it, that's the whole deal.

---

🔥 ERRORS 🔥

the pthread_barrierattr_init() function shall fail if:

• ENOMEM — Insufficient memory exists to initialize the barrier attributes object. 😭 the malloc said no.

and one more thing: these functions shall not return an error code of [EINTR]. not even a lil bit.

psst — the following sections are informative. meaning: vibes, not rules. ✨

---

🎀 EXAMPLES 🎀

None. 😌 (yes literally none, that's the whole example section)

---

🍓 APPLICATION USAGE 🍓

None. 🫶 (again, nothing. iconic of them honestly)

---

💅 RATIONALE 💅

if an implementation detects that the value specified by the attr argument to pthread_barrierattr_destroy() does not refer to an initialized barrier attributes object, it is recommended that the function should fail and report an [EINVAL] error. that's the recommendation, not a promise. iykyk. 👑

---

🌈 FUTURE DIRECTIONS 🌈

None. ✨ the future is empty, bestie, just vibes.

---

⭐ SEE ALSO ⭐

• pthread_barrierattr_getpshared()
• The Base Definitions volume of POSIX.1‐2017, <pthread.h>

---

👑 COPYRIGHT 👑

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .

---

and that's a wrap, bestie!! 💖✨ this one came from the IEEE/The Open Group, dated 2017, filed under that legendary POSIX Programmer's Manual energy. go forth and destroy (ur barrier attributes) responsibly. periodt. 💅🦋🌸