Section: POSIX Programmer's Manual (3P)
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.
--- destroy and initialize the read-write lock attributes object
int pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr);
int pthread_rwlockattr_init(pthread_rwlockattr_t *attr);
function shall destroy a read-write lock attributes object. A destroyed
attributes object can be reinitialized using
the results of otherwise referencing the object after it
has been destroyed are undefined. An implementation may cause
to set the object referenced by
to an invalid value.
function shall initialize a read-write lock attributes object
with the default value for all of the attributes defined by the
Results are undefined if
is called specifying an already initialized
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
does not refer to an initialized read-write lock attributes object.
If successful, the
functions shall return zero; otherwise, an error number shall be
returned to indicate the error.
function shall fail if:
Insufficient memory exists to initialize the read-write lock attributes
These functions shall not return an error code of
The following sections are informative.
If an implementation detects that the value specified by the
does not refer to an initialized read-write lock attributes object,
it is recommended that the function should fail and report an
The Base Definitions volume of POSIX.1-2017,
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
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