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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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PTHREAD_DETACH(3P) POSIX Programmer's Manual PTHREAD_DETACH(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.
pthread_detach — detach a thread
#include <pthread.h>
int pthread_detach(pthread_t thread);
The pthread_detach() function shall indicate to the
implementation that storage for the thread thread can be
reclaimed when that thread terminates. If thread has not
terminated, pthread_detach() shall not cause it to terminate.
The behavior is undefined if the value specified by the thread
argument to pthread_detach() does not refer to a joinable thread.
If the call succeeds, pthread_detach() shall return 0; otherwise,
an error number shall be returned to indicate the error.
The pthread_detach() function shall not return an error code of
[EINTR].
The following sections are informative.
None.
None.
The pthread_join() or pthread_detach() functions should
eventually be called for every thread that is created so that
storage associated with the thread may be reclaimed.
It has been suggested that a ``detach'' function is not
necessary; the detachstate thread creation attribute is
sufficient, since a thread need never be dynamically detached.
However, need arises in at least two cases:
1. In a cancellation handler for a pthread_join() it is nearly
essential to have a pthread_detach() function in order to
detach the thread on which pthread_join() was waiting.
Without it, it would be necessary to have the handler do
another pthread_join() to attempt to detach the thread, which
would both delay the cancellation processing for an unbounded
period and introduce a new call to pthread_join(), which
might itself need a cancellation handler. A dynamic detach is
nearly essential in this case.
2. In order to detach the ``initial thread'' (as may be
desirable in processes that set up server threads).
If an implementation detects that the value specified by the
thread argument to pthread_detach() does not refer to a joinable
thread, it is recommended that the function should fail and
report an [EINVAL] error.
If an implementation detects use of a thread ID after the end of
its lifetime, it is recommended that the function should fail and
report an [ESRCH] error.
None.
pthread_join(3p)
The Base Definitions volume of POSIX.1‐2017, pthread.h(0p)
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 http://www.opengroup.org/unix/online.html .
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
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2017 PTHREAD_DETACH(3P)
Pages that refer to this page: pthread.h(0p)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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