PTHREAD_RWLOCKATTR_DESTROY(3P)OSIX Programmer's ManuPaTlHREAD_RWLOCKATTR_DESTROY(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_rwlockattr_destroy, pthread_rwlockattr_init -- destroy and
       initialize the read-write lock attributes object

SSYYNNOOPPSSIISS
       #include <pthread.h>

       int pthread_rwlockattr_destroy(pthread_rwlockattr_t *_a_t_t_r);
       int pthread_rwlockattr_init(pthread_rwlockattr_t *_a_t_t_r);

DDEESSCCRRIIPPTTIIOONN
       The _p_t_h_r_e_a_d___r_w_l_o_c_k_a_t_t_r___d_e_s_t_r_o_y() function shall destroy a read-write
       lock attributes object. A destroyed _a_t_t_r attributes object can be
       reinitialized using _p_t_h_r_e_a_d___r_w_l_o_c_k_a_t_t_r___i_n_i_t(); the results of otherwise
       referencing the object after it has been destroyed are undefined. An
       implementation may cause _p_t_h_r_e_a_d___r_w_l_o_c_k_a_t_t_r___d_e_s_t_r_o_y() to set the object
       referenced by _a_t_t_r to an invalid value.

       The _p_t_h_r_e_a_d___r_w_l_o_c_k_a_t_t_r___i_n_i_t() function shall initialize a read-write
       lock attributes object _a_t_t_r with the default value for all of the
       attributes defined by the implementation.

       Results are undefined if _p_t_h_r_e_a_d___r_w_l_o_c_k_a_t_t_r___i_n_i_t() is called specifying
       an already initialized _a_t_t_r attributes object.

       After a read-write lock attributes object has been used to initialize
       one or more read-write locks, any function affecting the attributes
       object (including destruction) shall not affect any previously
       initialized read-write locks.

       The behavior is undefined if the value specified by the _a_t_t_r argument
       to _p_t_h_r_e_a_d___r_w_l_o_c_k_a_t_t_r___d_e_s_t_r_o_y() does not refer to an initialized read-
       write lock attributes object.

RREETTUURRNN VVAALLUUEE
       If successful, the _p_t_h_r_e_a_d___r_w_l_o_c_k_a_t_t_r___d_e_s_t_r_o_y() and
       _p_t_h_r_e_a_d___r_w_l_o_c_k_a_t_t_r___i_n_i_t() functions shall return zero; otherwise, an
       error number shall be returned to indicate the error.

EERRRROORRSS
       The _p_t_h_r_e_a_d___r_w_l_o_c_k_a_t_t_r___i_n_i_t() function shall fail if:

       EENNOOMMEEMM Insufficient memory exists to initialize the read-write lock
              attributes object.

       These functions 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 _a_t_t_r
       argument to _p_t_h_r_e_a_d___r_w_l_o_c_k_a_t_t_r___d_e_s_t_r_o_y() does not refer to an
       initialized read-write lock attributes object, it is recommended that
       the function should fail and report an [[EEIINNVVAALL]] error.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       _p_t_h_r_e_a_d___r_w_l_o_c_k___d_e_s_t_r_o_y(), _p_t_h_r_e_a_d___r_w_l_o_c_k_a_t_t_r___g_e_t_p_s_h_a_r_e_d()

       The Base Definitions volume of POSIX.1-2008, <<pptthhrreeaadd..hh>>

CCOOPPYYRRIIGGHHTT
       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, Copyright (C) 2013 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open Group.  (This is
       POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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.unix.org/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                  2013        PTHREAD_RWLOCKATTR_DESTROY(3)
