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-.\" Copyright (c) 2017, Michael Kerrisk <mtk.manpages@gmail.com>
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.TH pthread_spin_lock 3 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-pthread_spin_lock, pthread_spin_trylock, pthread_spin_unlock \-
-lock and unlock a spin lock
-.SH LIBRARY
-POSIX threads library
-.RI ( libpthread ", " \-lpthread )
-.SH SYNOPSIS
-.nf
-.B #include <pthread.h>
-.P
-.BI "int pthread_spin_lock(pthread_spinlock_t *" lock );
-.BI "int pthread_spin_trylock(pthread_spinlock_t *" lock );
-.BI "int pthread_spin_unlock(pthread_spinlock_t *" lock );
-.fi
-.P
-.RS -4
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.RE
-.P
-.BR pthread_spin_lock (),
-.BR pthread_spin_trylock ():
-.nf
-    _POSIX_C_SOURCE >= 200112L
-.fi
-.SH DESCRIPTION
-The
-.BR pthread_spin_lock ()
-function locks the spin lock referred to by
-.IR lock .
-If the spin lock is currently unlocked,
-the calling thread acquires the lock immediately.
-If the spin lock is currently locked by another thread,
-the calling thread spins, testing the lock until it becomes available,
-at which point the calling thread acquires the lock.
-.P
-Calling
-.BR pthread_spin_lock ()
-on a lock that is already held by the caller
-or a lock that has not been initialized with
-.BR pthread_spin_init (3)
-results in undefined behavior.
-.P
-The
-.BR pthread_spin_trylock ()
-function is like
-.BR pthread_spin_lock (),
-except that if the spin lock referred to by
-.I lock
-is currently locked,
-then, instead of spinning, the call returns immediately with the error
-.BR EBUSY .
-.P
-The
-.BR pthread_spin_unlock ()
-function unlocks the spin lock referred to
-.IR lock .
-If any threads are spinning on the lock,
-one of those threads will then acquire the lock.
-.P
-Calling
-.BR pthread_spin_unlock ()
-on a lock that is not held by the caller results in undefined behavior.
-.SH RETURN VALUE
-On success, these functions return zero.
-On failure, they return an error number.
-.SH ERRORS
-.BR pthread_spin_lock ()
-may fail with the following errors:
-.TP
-.B EDEADLOCK
-.\" Not detected in glibc
-The system detected a deadlock condition.
-.P
-.BR pthread_spin_trylock ()
-fails with the following errors:
-.TP
-.B EBUSY
-The spin lock is currently locked by another thread.
-.SH STANDARDS
-POSIX.1-2008.
-.SH HISTORY
-glibc 2.2.
-POSIX.1-2001.
-.SH CAVEATS
-Applying any of the functions described on this page to
-an uninitialized spin lock results in undefined behavior.
-.P
-Carefully read NOTES in
-.BR pthread_spin_init (3).
-.SH SEE ALSO
-.ad l
-.nh
-.\" FIXME . .BR pthread_mutex_lock (3),
-.BR pthread_spin_destroy (3),
-.BR pthread_spin_init (3),
-.BR pthreads (7)