SEM_DESTROY(3)             POSIX Programmer's Manual            SEM_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
       sem_destroy -- destroy an unnamed semaphore

SSYYNNOOPPSSIISS
       #include <semaphore.h>

       int sem_destroy(sem_t *_s_e_m);

DDEESSCCRRIIPPTTIIOONN
       The _s_e_m___d_e_s_t_r_o_y() function shall destroy the unnamed semaphore
       indicated by _s_e_m.  Only a semaphore that was created using _s_e_m___i_n_i_t()
       may be destroyed using _s_e_m___d_e_s_t_r_o_y(); the effect of calling
       _s_e_m___d_e_s_t_r_o_y() with a named semaphore is undefined. The effect of
       subsequent use of the semaphore _s_e_m is undefined until _s_e_m is
       reinitialized by another call to _s_e_m___i_n_i_t().

       It is safe to destroy an initialized semaphore upon which no threads
       are currently blocked. The effect of destroying a semaphore upon which
       other threads are currently blocked is undefined.

RREETTUURRNN VVAALLUUEE
       Upon successful completion, a value of zero shall be returned.
       Otherwise, a value of -1 shall be returned and _e_r_r_n_o set to indicate
       the error.

EERRRROORRSS
       The _s_e_m___d_e_s_t_r_o_y() function may fail if:

       EEIINNVVAALL The _s_e_m argument is not a valid semaphore.

       EEBBUUSSYY  There are currently processes blocked on the semaphore.

       _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
       None.

FFUUTTUURREE DDIIRREECCTTIIOONNSS
       None.

SSEEEE AALLSSOO
       _s_e_m_c_t_l(), _s_e_m_g_e_t(), _s_e_m_o_p(), _s_e_m___i_n_i_t(), _s_e_m___o_p_e_n()

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