PTHREAD_CONDATTR_DESTROY(3)POSIX Programmer's ManualPTHREAD_CONDATTR_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_condattr_destroy, pthread_condattr_init -- destroy and
       initialize the condition variable attributes object

SSYYNNOOPPSSIISS
       #include <pthread.h>

       int pthread_condattr_destroy(pthread_condattr_t *_a_t_t_r);
       int pthread_condattr_init(pthread_condattr_t *_a_t_t_r);

DDEESSCCRRIIPPTTIIOONN
       The _p_t_h_r_e_a_d___c_o_n_d_a_t_t_r___d_e_s_t_r_o_y() function shall destroy a condition
       variable attributes object; the object becomes, in effect,
       uninitialized. An implementation may cause _p_t_h_r_e_a_d___c_o_n_d_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. A destroyed
       _a_t_t_r attributes object can be reinitialized using
       _p_t_h_r_e_a_d___c_o_n_d_a_t_t_r___i_n_i_t(); the results of otherwise referencing the
       object after it has been destroyed are undefined.

       The _p_t_h_r_e_a_d___c_o_n_d_a_t_t_r___i_n_i_t() function shall initialize a condition
       variable 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___c_o_n_d_a_t_t_r___i_n_i_t() is called specifying
       an already initialized _a_t_t_r attributes object.

       After a condition variable attributes object has been used to
       initialize one or more condition variables, any function affecting the
       attributes object (including destruction) shall not affect any
       previously initialized condition variables.

       This volume of POSIX.1-2017 requires two attributes, the _c_l_o_c_k
       attribute and the _p_r_o_c_e_s_s_-_s_h_a_r_e_d attribute.

       Additional attributes, their default values, and the names of the
       associated functions to get and set those attribute values are
       implementation-defined.

       The behavior is undefined if the value specified by the _a_t_t_r argument
       to _p_t_h_r_e_a_d___c_o_n_d_a_t_t_r___d_e_s_t_r_o_y() does not refer to an initialized
       condition variable attributes object.

RREETTUURRNN VVAALLUUEE
       If successful, the _p_t_h_r_e_a_d___c_o_n_d_a_t_t_r___d_e_s_t_r_o_y() and
       _p_t_h_r_e_a_d___c_o_n_d_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___c_o_n_d_a_t_t_r___i_n_i_t() function shall fail if:

       EENNOOMMEEMM Insufficient memory exists to initialize the condition variable
              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
       A _p_r_o_c_e_s_s_-_s_h_a_r_e_d attribute has been defined for condition variables for
       the same reason it has been defined for mutexes.

       If an implementation detects that the value specified by the _a_t_t_r
       argument to _p_t_h_r_e_a_d___c_o_n_d_a_t_t_r___d_e_s_t_r_o_y() does not refer to an initialized
       condition variable attributes object, it is recommended that the
       function should fail and report an [[EEIINNVVAALL]] error.

       See also _p_t_h_r_e_a_d___a_t_t_r___d_e_s_t_r_o_y() and _p_t_h_r_e_a_d___m_u_t_e_x___d_e_s_t_r_o_y().

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       _p_t_h_r_e_a_d___a_t_t_r___d_e_s_t_r_o_y(), _p_t_h_r_e_a_d___c_o_n_d___d_e_s_t_r_o_y(),
       _p_t_h_r_e_a_d___c_o_n_d_a_t_t_r___g_e_t_p_s_h_a_r_e_d(), _p_t_h_r_e_a_d___c_r_e_a_t_e(),
       _p_t_h_r_e_a_d___m_u_t_e_x___d_e_s_t_r_o_y()

       The Base Definitions volume of POSIX.1-2017, <<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_CONDATTR_DESTROY(3)
