pthread_rwlockattr_destroy(3p) — Linux manual page



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

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

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

       Results are undefined if pthread_rwlockattr_init() is called
       specifying an already initialized attr 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 attr argument
       to pthread_rwlockattr_destroy() does not refer to an initialized
       read-write lock attributes object.

RETURN VALUE         top

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

ERRORS         top

       The pthread_rwlockattr_init() function shall fail if:

       ENOMEM Insufficient 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




RATIONALE         top

       If an implementation detects that the value specified by the attr
       argument to pthread_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.



SEE ALSO         top

       pthread_rwlock_destroy(3p), pthread_rwlockattr_getpshared(3p)

       The Base Definitions volume of POSIX.1‐2008, pthread.h(0p)

COPYRIGHT         top

       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 .

       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 .

IEEE/The Open Group                 2013      PTHREAD_RWLOCKATTR_DESTROY(3P)

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