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



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

NNAAMMEE
       pthread_spin_unlock -- unlock a spin lock object

SSYYNNOOPPSSIISS
       #include <pthread.h>

       int pthread_spin_unlock(pthread_spinlock_t *_l_o_c_k);

DDEESSCCRRIIPPTTIIOONN
       The _p_t_h_r_e_a_d___s_p_i_n___u_n_l_o_c_k() function shall release the spin lock
       referenced by _l_o_c_k which was locked via the _p_t_h_r_e_a_d___s_p_i_n___l_o_c_k() or
       _p_t_h_r_e_a_d___s_p_i_n___t_r_y_l_o_c_k() functions.

       The results are undefined if the lock is not held by the calling
       thread.

       If there are threads spinning on the lock when _p_t_h_r_e_a_d___s_p_i_n___u_n_l_o_c_k() 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.

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

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

       _T_h_e _f_o_l_l_o_w_i_n_g _s_e_c_t_i_o_n_s _a_r_e _i_n_f_o_r_m_a_t_i_v_e_.

EEXXAAMMPPLLEESS
       None.

AAPPPPLLIICCAATTIIOONN UUSSAAGGEE
       None.

RRAATTIIOONNAALLEE
       If an implementation detects that the value specified by the _l_o_c_k
       argument to _p_t_h_r_e_a_d___s_p_i_n___u_n_l_o_c_k() does not refer to an initialized spin
       lock object, it is recommended that the function should fail and report
       an [[EEIINNVVAALL]] error.

       If an implementation detects that the value specified by the _l_o_c_k
       argument to _p_t_h_r_e_a_d___s_p_i_n___u_n_l_o_c_k() 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 [[EEPPEERRMM]] error.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       _p_t_h_r_e_a_d___s_p_i_n___d_e_s_t_r_o_y(), _p_t_h_r_e_a_d___s_p_i_n___l_o_c_k()

       The Base Definitions volume of POSIX.1-2017, _S_e_c_t_i_o_n _4_._1_2, _M_e_m_o_r_y
       _S_y_n_c_h_r_o_n_i_z_a_t_i_o_n, <<pptthhrreeaadd..hh>>

CCOOPPYYRRIIGGHHTT
       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(3)
