1PTHREAD_RWLOCKATTR_DESTROY(3PPO)SIX Programmer's ManPuTaHlREAD_RWLOCKATTR_DESTROY(3P)
2
6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
10
12 pthread_rwlockattr_destroy, pthread_rwlockattr_init — destroy and ini‐
13 tialize the read-write lock attributes object
14
16 #include <pthread.h>
17 int pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr);
19 int pthread_rwlockattr_init(pthread_rwlockattr_t *attr);
20
22 The pthread_rwlockattr_destroy() function shall destroy a read-write
23 lock attributes object. A destroyed attr attributes object can be
24 reinitialized using pthread_rwlockattr_init(); the results of otherwise
25 referencing the object after it has been destroyed are undefined. An
26 implementation may cause pthread_rwlockattr_destroy() to set the object
27 referenced by attr to an invalid value.
28 The pthread_rwlockattr_init() function shall initialize a read-write
30 lock attributes object attr with the default value for all of the
31 attributes defined by the implementation.
32 Results are undefined if pthread_rwlockattr_init() is called specifying
34 an already initialized attr attributes object.
35 After a read-write lock attributes object has been used to initialize
37 one or more read-write locks, any function affecting the attributes
38 object (including destruction) shall not affect any previously initial‐
39 ized read-write locks.
40 The behavior is undefined if the value specified by the attr argument
42 to pthread_rwlockattr_destroy() does not refer to an initialized read-
43 write lock attributes object.
44
46 If successful, the pthread_rwlockattr_destroy() and pthread_rwlock‐
47 attr_init() functions shall return zero; otherwise, an error number
48 shall be returned to indicate the error.
49
51 The pthread_rwlockattr_init() function shall fail if:
52 ENOMEM Insufficient memory exists to initialize the read-write lock
54 attributes object.
55 These functions shall not return an error code of [EINTR].
57 The following sections are informative.
59
61 None.
62
64 None.
65
67 If an implementation detects that the value specified by the attr argu‐
68 ment to pthread_rwlockattr_destroy() does not refer to an initialized
69 read-write lock attributes object, it is recommended that the function
70 should fail and report an [EINVAL] error.
71
73 None.
74
76 pthread_rwlock_destroy(), pthread_rwlockattr_getpshared()
77 The Base Definitions volume of POSIX.1‐2017, <pthread.h>
79
81 Portions of this text are reprinted and reproduced in electronic form
82 from IEEE Std 1003.1-2017, Standard for Information Technology -- Por‐
83 table Operating System Interface (POSIX), The Open Group Base Specifi‐
84 cations Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of
85 Electrical and Electronics Engineers, Inc and The Open Group. In the
86 event of any discrepancy between this version and the original IEEE and
87 The Open Group Standard, the original IEEE and The Open Group Standard
88 is the referee document. The original Standard can be obtained online
89 at http://www.opengroup.org/unix/online.html .
90 Any typographical or formatting errors that appear in this page are
92 most likely to have been introduced during the conversion of the source
93 files to man page format. To report such errors, see https://www.ker‐
94 nel.org/doc/man-pages/reporting_bugs.html .
95IEEE/The Open Group 2017 PTHREAD_RWLOCKATTR_DESTROY(3P)