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



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 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
       IEEE Std 1003.1-2001, <pthread.h>

COPYRIGHT
       Portions	 of  this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
       --  Portable  Operating	System	Interface (POSIX), The Open Group Base
       Specifications Issue 6, Copyright (C) 2001-2003	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 .



IEEE/The Open Group		     2003		      PTHREAD_EQUAL(P)
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