1PTHREAD_DETACH(P) POSIX Programmer's Manual PTHREAD_DETACH(P)
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6 pthread_detach - detach a thread
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9 #include <pthread.h>
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11 int pthread_detach(pthread_t thread);
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15 The pthread_detach() function shall indicate to the implementation that
16 storage for the thread thread can be reclaimed when that thread termi‐
17 nates. If thread has not terminated, pthread_detach() shall not cause
18 it to terminate. The effect of multiple pthread_detach() calls on the
19 same target thread is unspecified.
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22 If the call succeeds, pthread_detach() shall return 0; otherwise, an
23 error number shall be returned to indicate the error.
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26 The pthread_detach() function shall fail if:
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28 EINVAL The implementation has detected that the value specified by
29 thread does not refer to a joinable thread.
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31 ESRCH No thread could be found corresponding to that specified by the
32 given thread ID.
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35 The pthread_detach() function shall not return an error code of
36 [EINTR].
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38 The following sections are informative.
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41 None.
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44 None.
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47 The pthread_join() or pthread_detach() functions should eventually be
48 called for every thread that is created so that storage associated with
49 the thread may be reclaimed.
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51 It has been suggested that a "detach" function is not necessary; the
52 detachstate thread creation attribute is sufficient, since a thread
53 need never be dynamically detached. However, need arises in at least
54 two cases:
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56 1. In a cancellation handler for a pthread_join() it is nearly essen‐
57 tial to have a pthread_detach() function in order to detach the
58 thread on which pthread_join() was waiting. Without it, it would be
59 necessary to have the handler do another pthread_join() to attempt
60 to detach the thread, which would both delay the cancellation pro‐
61 cessing for an unbounded period and introduce a new call to
62 pthread_join(), which might itself need a cancellation handler. A
63 dynamic detach is nearly essential in this case.
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65 2. In order to detach the "initial thread" (as may be desirable in
66 processes that set up server threads).
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69 None.
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72 pthread_join() , the Base Definitions volume of IEEE Std 1003.1-2001,
73 <pthread.h>
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76 Portions of this text are reprinted and reproduced in electronic form
77 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
78 -- Portable Operating System Interface (POSIX), The Open Group Base
79 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
80 Electrical and Electronics Engineers, Inc and The Open Group. In the
81 event of any discrepancy between this version and the original IEEE and
82 The Open Group Standard, the original IEEE and The Open Group Standard
83 is the referee document. The original Standard can be obtained online
84 at http://www.opengroup.org/unix/online.html .
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88IEEE/The Open Group 2003 PTHREAD_DETACH(P)