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PTHREAD_EQUAL(3P)          POSIX Programmer's Manual         PTHREAD_EQUAL(3P)
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 detec-
       tion of  ``dangling  IDs''  (copies  of  a  thread  ID  that  has  been
       detached).  Since  the C language does not support comparison on struc-
       ture 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.1-2008, <pthread.h>
COPYRIGHT
       Portions  of  this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri-
       cal  and  Electronics  Engineers,  Inc  and  The  Open Group.  (This is
       POSIX.1-2008 with the 2013 Technical Corrigendum  1  applied.)  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.unix.org/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.ker-
       nel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group                  2013                    PTHREAD_EQUAL(3P)