oracular (3) pthread_equal.3posix.gz

Provided by: manpages-posix-dev_2017a-2_all bug

PROLOG
       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.


NAME
       pthread_equal — compare thread IDs


SYNOPSIS
       #include <pthread.h>

       int pthread_equal(pthread_t t1, pthread_t t2);


DESCRIPTION
       This function shall compare the thread IDs t1 and t2.


RETURN VALUE
       The  pthread_equal() function shall return a non-zero value if t1 and t2 are equal; otherwise, zero shall
       be returned.

       If either t1 or t2 are not valid thread IDs, the behavior is undefined.


ERRORS
       No errors are defined.

       The pthread_equal() function shall not return an error code of [EINTR].

       The following sections are informative.


EXAMPLES
       None.


APPLICATION USAGE
       None.


RATIONALE
       Implementations may choose to define a thread ID as a structure. This allows additional  flexibility  and
       robustness  over  using  an  int.   For  example, a thread ID could include a sequence number that allows
       detection of ``dangling IDs'' (copies of a thread ID that has been detached). Since the C  language  does
       not  support  comparison  on  structure types, the pthread_equal() function is provided to compare thread
       IDs.


FUTURE DIRECTIONS
       None.


SEE ALSO
       pthread_create(), pthread_self()

       The Base Definitions volume of POSIX.1‐2017, <pthread.h>


       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 .