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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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PTHREAD_SPIN_UNLOCK(3P) POSIX Programmer's Manual PTHREAD_SPIN_UNLOCK(3P)
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.
pthread_spin_unlock — unlock a spin lock object
#include <pthread.h>
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 lock.
Upon successful completion, the pthread_spin_unlock() function
shall return zero; otherwise, an error number shall be returned to
indicate the error.
This function shall not return an error code of [EINTR].
The following sections are informative.
None.
None.
If an implementation detects that the value specified by the lock
argument to pthread_spin_unlock() does not refer to an initialized
spin lock object, it is recommended that the function should fail
and report an [EINVAL] error.
If an implementation detects that the value specified by the lock
argument to pthread_spin_unlock() refers to a spin lock object for
which the current thread does not hold the lock, it is recommended
that the function should fail and report an [EPERM] error.
None.
pthread_spin_destroy(3p), pthread_spin_lock(3p)
The Base Definitions volume of POSIX.1‐2017, Section 4.12, Memory
Synchronization, pthread.h(0p)
Portions of this text are reprinted and reproduced in electronic
form from IEEE Std 1003.1-2017, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The
Open Group Base Specifications Issue 7, 2018 Edition, Copyright
(C) 2018 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 .
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 2017 PTHREAD_SPIN_UNLOCK(3P)
Pages that refer to this page: pthread.h(0p), pthread_spin_destroy(3p), pthread_spin_lock(3p)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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