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pthread_equal(3) — Linux manual page

pthread_equal(3)         Library Functions Manualpthread_equal(3)

NAME        top

       pthread_equal - compare thread IDs

LIBRARY        top

       POSIX threads library (libpthread,-lpthread)

SYNOPSIS        top

#include <pthread.h>int pthread_equal(pthread_tt1, pthread_tt2);

DESCRIPTION        top

       Thepthread_equal() function compares two thread identifiers.

RETURN VALUE        top

       If the two thread IDs are equal,pthread_equal() returns a nonzero       value; otherwise, it returns 0.

ERRORS        top

       This function always succeeds.

ATTRIBUTES        top

       For an explanation of the terms used in this section, seeattributes(7).       ┌──────────────────────────────────────┬───────────────┬─────────┐       │Interface│Attribute│Value│       ├──────────────────────────────────────┼───────────────┼─────────┤       │pthread_equal()                      │ Thread safety │ MT-Safe │       └──────────────────────────────────────┴───────────────┴─────────┘

STANDARDS        top

       POSIX.1-2008.

HISTORY        top

       POSIX.1-2001.

NOTES        top

       Thepthread_equal() function is necessary because thread IDs       should be considered opaque: there is no portable way for       applications to directly compare twopthread_t values.

SEE ALSO        top

pthread_create(3),pthread_self(3),pthreads(7)

COLOPHON        top

       This page is part of theman-pages (Linux kernel and C library       user-space interface documentation) project.  Information about       the project can be found at        ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report       for this manual page, see       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.       This page was obtained from the tarball man-pages-6.15.tar.gz       fetched from       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on       2025-08-11.  If you discover any rendering problems in this HTML       version of the page, or you believe there is a better or more up-       to-date source for the page, or you have corrections or       improvements to the information in this COLOPHON (which isnot       part of the original manual page), send a mail to       man-pages@man7.orgLinux man-pages 6.15            2025-05-17pthread_equal(3)

Pages that refer to this page:pthread_create(3), pthread_self(3), pthreads(7)

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