pthread_equal(3p) [centos man page]

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 correspond-
       ing 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 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 Technol-
       ogy -- 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(3P)

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

PROLOG

       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME

       pthread_spin_unlock - unlock a spin lock object (ADVANCED REALTIME THREADS)

SYNOPSIS

       #include <pthread.h>

       int pthread_spin_unlock(pthread_spinlock_t *lock);

DESCRIPTION

       The pthread_spin_unlock() function shall release the spin lock  referenced  by  lock  which  was  locked  via  the  pthread_spin_lock()	or
       pthread_spin_trylock() functions. The results are undefined if the lock is not held by the calling thread. If there are threads spinning on
       the lock when pthread_spin_unlock() is called, the lock becomes available and an unspecified spinning thread shall acquire the lock.

       The results are undefined if this function is called with an uninitialized thread spin lock.

RETURN VALUE

       Upon successful completion, the pthread_spin_unlock() function shall return zero; otherwise, an error number shall be returned to  indicate
       the error.

ERRORS

       The pthread_spin_unlock() function may fail if:

       EINVAL An invalid argument was specified.

       EPERM  The calling thread does not hold the lock.

       This function shall not return an error code of [EINTR].

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       The pthread_spin_unlock() function is part of the Spin Locks option and need not be provided on all implementations.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       pthread_spin_destroy(), pthread_spin_lock(), 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 Technol-
       ogy -- 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_SPIN_UNLOCK(3P)