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PTHREAD_DETACH

Section: Linux Programmer's Manual (3)
Updated: 2017-09-15
Index Return to Main Contents
 

NAME

pthread_detach - detach a thread  

SYNOPSIS

#include <pthread.h>

int pthread_detach(pthread_t thread);

Compile and link with -pthread.  

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).
InterfaceAttributeValue
pthread_detach() Thread safetyMT-Safe

 

CONFORMING TO

POSIX.1-2001, POSIX.1-2008.  

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 all threads are freed when the process terminates.)  

EXAMPLE

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

This page is part of release 4.13 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
ATTRIBUTES
CONFORMING TO
NOTES
EXAMPLE
SEE ALSO
COLOPHON





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