Linux 2.6 - man page for pthread_spin_unlock (linux section 3posix)
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PTHREAD_SPIN_UNLOCK(P) POSIX Programmer's Manual PTHREAD_SPIN_UNLOCK(P)
pthread_spin_unlock - unlock a spin lock object (ADVANCED REALTIME THREADS)
int pthread_spin_unlock(pthread_spinlock_t *lock);
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
Upon successful completion, the pthread_spin_unlock() function shall return zero; other-
wise, an error number shall be returned to indicate the error.
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.
The pthread_spin_unlock() function is part of the Spin Locks option and need not be pro-
vided on all implementations.
pthread_spin_destroy() , pthread_spin_lock() , the Base Definitions volume of
IEEE Std 1003.1-2001, <pthread.h>
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 orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 PTHREAD_SPIN_UNLOCK(P)
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