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pthread_spin_unlock(3p) — Linux manual page

PTHREAD_SPIN_UNLOCK(3P) POSIX Programmer's ManualPTHREAD_SPIN_UNLOCK(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_spin_unlock — unlock a spin lock object

SYNOPSIS        top

       #include <pthread.h>       int pthread_spin_unlock(pthread_spinlock_t *lock);

DESCRIPTION        top

       Thepthread_spin_unlock() function shall release the spin lock       referenced bylock which was locked via thepthread_spin_lock() orpthread_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 whenpthread_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        top

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

ERRORS        top

       This function shall not return an error code of[EINTR].The following sections are informative.

EXAMPLES        top

       None.

APPLICATION USAGE        top

       None.

RATIONALE        top

       If an implementation detects that the value specified by thelock       argument topthread_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 thelock       argument topthread_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.

FUTURE DIRECTIONS        top

       None.

SEE ALSO        top

pthread_spin_destroy(3p),pthread_spin_lock(3p)       The Base Definitions volume of POSIX.1‐2017,Section 4.12,MemorySynchronization,pthread.h(0p)

COPYRIGHT        top

       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 athttp://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, seehttps://www.kernel.org/doc/man-pages/reporting_bugs.html .IEEE/The Open Group                2017PTHREAD_SPIN_UNLOCK(3P)

Pages that refer to this page:pthread.h(0p), pthread_spin_destroy(3p), pthread_spin_lock(3p)

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