1PTHREAD_DETACH(3P) POSIX Programmer's Manual PTHREAD_DETACH(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
13 pthread_detach — detach a thread
14
16 #include <pthread.h>
17 int pthread_detach(pthread_t thread);
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21 The pthread_detach() function shall indicate to the implementation that
22 storage for the thread thread can be reclaimed when that thread termi‐
23 nates. If thread has not terminated, pthread_detach() shall not cause
24 it to terminate.
25 The behavior is undefined if the value specified by the thread argument
27 to pthread_detach() does not refer to a joinable thread.
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30 If the call succeeds, pthread_detach() shall return 0; otherwise, an
31 error number shall be returned to indicate the error.
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34 The pthread_detach() function shall not return an error code of
35 [EINTR].
36 The following sections are informative.
38
40 None.
41
43 None.
44
46 The pthread_join() or pthread_detach() functions should eventually be
47 called for every thread that is created so that storage associated with
48 the thread may be reclaimed.
49 It has been suggested that a ``detach'' function is not necessary; the
51 detachstate thread creation attribute is sufficient, since a thread
52 need never be dynamically detached. However, need arises in at least
53 two cases:
54 1. In a cancellation handler for a pthread_join() it is nearly essen‐
56 tial to have a pthread_detach() function in order to detach the
57 thread on which pthread_join() was waiting. Without it, it would be
58 necessary to have the handler do another pthread_join() to attempt
59 to detach the thread, which would both delay the cancellation pro‐
60 cessing for an unbounded period and introduce a new call to
61 pthread_join(), which might itself need a cancellation handler. A
62 dynamic detach is nearly essential in this case.
63 2. In order to detach the ``initial thread'' (as may be desirable in
65 processes that set up server threads).
66 If an implementation detects that the value specified by the thread
68 argument to pthread_detach() does not refer to a joinable thread, it is
69 recommended that the function should fail and report an [EINVAL] error.
70 If an implementation detects use of a thread ID after the end of its
72 lifetime, it is recommended that the function should fail and report an
73 [ESRCH] error.
74
76 None.
77
79 pthread_join()
80 The Base Definitions volume of POSIX.1‐2008, <pthread.h>
82
84 Portions of this text are reprinted and reproduced in electronic form
85 from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
86 -- Portable Operating System Interface (POSIX), The Open Group Base
87 Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
88 cal and Electronics Engineers, Inc and The Open Group. (This is
89 POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
90 event of any discrepancy between this version and the original IEEE and
91 The Open Group Standard, the original IEEE and The Open Group Standard
92 is the referee document. The original Standard can be obtained online
93 at http://www.unix.org/online.html .
94 Any typographical or formatting errors that appear in this page are
96 most likely to have been introduced during the conversion of the source
97 files to man page format. To report such errors, see https://www.ker‐
98 nel.org/doc/man-pages/reporting_bugs.html .
99IEEE/The Open Group 2013 PTHREAD_DETACH(3P)