PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT

PTHREAD_EQUAL(3P)         POSIX Programmer's Manual        PTHREAD_EQUAL(3P)

PROLOG         top

       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         top

       pthread_equal — compare thread IDs

SYNOPSIS         top

       #include <pthread.h>

       int pthread_equal(pthread_t t1, pthread_t t2);

DESCRIPTION         top

       This function shall compare the thread IDs t1 and t2.

RETURN VALUE         top

       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         top

       No errors are defined.

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

       The following sections are informative.

EXAMPLES         top

       None.

APPLICATION USAGE         top

       None.

RATIONALE         top

       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         top

       None.

SEE ALSO         top

       pthread_create(3p), pthread_self(3p)

       The Base Definitions volume of POSIX.1‐2008, pthread.h(0p)

COPYRIGHT         top

       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 Electrical 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.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                 2013                   PTHREAD_EQUAL(3P)

Pages that refer to this page: pthread.h(0p)pthread_self(3p)