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pthread_rwlockattr_destroy(3p) — Linux manual page

PTHREAD_..._DESTROY(3P) POSIX Programmer's ManualPTHREAD_..._DESTROY(3P)

PROLOG        top

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

NAME        top

       pthread_rwlockattr_destroy, pthread_rwlockattr_init — destroy and       initialize the read-write lock attributes object

SYNOPSIS        top

       #include <pthread.h>       int pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr);       int pthread_rwlockattr_init(pthread_rwlockattr_t *attr);

DESCRIPTION        top

       Thepthread_rwlockattr_destroy() function shall destroy a read-       write lock attributes object. A destroyedattr attributes object       can be reinitialized usingpthread_rwlockattr_init(); the results       of otherwise referencing the object after it has been destroyed       are undefined. An implementation may causepthread_rwlockattr_destroy() to set the object referenced byattr       to an invalid value.       Thepthread_rwlockattr_init() function shall initialize a read-       write lock attributes objectattr with the default value for all       of the attributes defined by the implementation.       Results are undefined ifpthread_rwlockattr_init() is called       specifying an already initializedattr 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 theattr       argument topthread_rwlockattr_destroy() does not refer to an       initialized read-write lock attributes object.

RETURN VALUE        top

       If successful, thepthread_rwlockattr_destroy() andpthread_rwlockattr_init() functions shall return zero; otherwise,       an error number shall be returned to indicate the error.

ERRORS        top

       Thepthread_rwlockattr_init() function shall fail if:ENOMEMInsufficient memory exists to initialize the read-write              lock attributes object.       These functions shall not return an error code of[EINTR].The following sections are informative.

EXAMPLES        top

       None.

APPLICATION USAGE        top

       None.

RATIONALE        top

       If an implementation detects that the value specified by theattr       argument topthread_rwlockattr_destroy() does not refer to an       initialized read-write lock attributes object, it is recommended       that the function should fail and report an[EINVAL]error.

FUTURE DIRECTIONS        top

       None.

SEE ALSO        top

pthread_rwlock_destroy(3p),pthread_rwlockattr_getpshared(3p)       The Base Definitions volume of POSIX.1‐2017,pthread.h(0p)

COPYRIGHT        top

       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 athttp://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, seehttps://www.kernel.org/doc/man-pages/reporting_bugs.html .IEEE/The Open Group                2017PTHREAD_..._DESTROY(3P)

Pages that refer to this page:pthread.h(0p), pthread_rwlockattr_getpshared(3p), pthread_rwlockattr_init(3p)

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