pthread_detach(3) — Linux manual page

pthread_detach(3)       Library Functions Manual       pthread_detach(3)

NAME

       pthread_detach - detach a thread

LIBRARY

       POSIX threads library (libpthread, -lpthread)

SYNOPSIS

       #include <pthread.h>

       int pthread_detach(pthread_t thread);

DESCRIPTION

       The pthread_detach() function marks the thread identified by
       thread as detached.  When a detached thread terminates, its
       resources are automatically released back to the system without
       the need for another thread to join with the terminated thread.

       Attempting to detach an already detached thread results in
       unspecified behavior.

RETURN VALUE

       On success, pthread_detach() returns 0; on error, it returns an
       error number.

ERRORS

       EINVAL thread is not a joinable thread.

       ESRCH  No thread with the ID thread could be found.

ATTRIBUTES

       For an explanation of the terms used in this section, see
       attributes(7).
       ┌─────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                           │ Attribute     │ Value   │
       ├─────────────────────────────────────┼───────────────┼─────────┤
       │ pthread_detach()                    │ Thread safety │ MT-Safe │
       └─────────────────────────────────────┴───────────────┴─────────┘

STANDARDS

       POSIX.1-2008.

HISTORY

       POSIX.1-2001.

NOTES

       Once a thread has been detached, it can't be joined with
       pthread_join(3) or be made joinable again.

       A new thread can be created in a detached state using
       pthread_attr_setdetachstate(3) to set the detached attribute of
       the attr argument of pthread_create(3).

       The detached attribute merely determines the behavior of the
       system when the thread terminates; it does not prevent the thread
       from being terminated if the process terminates using exit(3) (or
       equivalently, if the main thread returns).

       Either pthread_join(3) or pthread_detach() should be called for
       each thread that an application creates, so that system resources
       for the thread can be released.  (But note that the resources of
       any threads for which one of these actions has not been done will
       be freed when the process terminates.)

EXAMPLES

       The following statement detaches the calling thread:

           pthread_detach(pthread_self());

SEE ALSO

       pthread_attr_setdetachstate(3), pthread_cancel(3),
       pthread_create(3), pthread_exit(3), pthread_join(3), pthreads(7)

COLOPHON

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Linux man-pages 6.9.1          2024-05-02              pthread_detach(3)

Pages that refer to this page: pthread_attr_setdetachstate(3), pthread_create(3), pthread_join(3), pthreads(7)

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