pthread_attr_setdetachstate - Man Page

set/get detach state attribute in thread attributes object


POSIX threads library (libpthread, -lpthread)


#include <pthread.h>

int pthread_attr_setdetachstate(pthread_attr_t *attr, int detachstate);
int pthread_attr_getdetachstate(const pthread_attr_t *attr,
                                int *detachstate);


The pthread_attr_setdetachstate() function sets the detach state attribute of the thread attributes object referred to by attr to the value specified in detachstate. The detach state attribute determines whether a thread created using the thread attributes object attr will be created in a joinable or a detached state.

The following values may be specified in detachstate:


Threads that are created using attr will be created in a detached state.


Threads that are created using attr will be created in a joinable state.

The default setting of the detach state attribute in a newly initialized thread attributes object is PTHREAD_CREATE_JOINABLE.

The pthread_attr_getdetachstate() returns the detach state attribute of the thread attributes object attr in the buffer pointed to by detachstate.

Return Value

On success, these functions return 0; on error, they return a nonzero error number.


pthread_attr_setdetachstate() can fail with the following error:


An invalid value was specified in detachstate.


For an explanation of the terms used in this section, see attributes(7).

pthread_attr_setdetachstate(), pthread_attr_getdetachstate()Thread safetyMT-Safe


POSIX.1-2001, POSIX.1-2008.


See pthread_create(3) for more details on detached and joinable threads.

A thread that is created in a joinable state should eventually either be joined using pthread_join(3) or detached using pthread_detach(3); see pthread_create(3).

It is an error to specify the thread ID of a thread that was created in a detached state in a later call to pthread_detach(3) or pthread_join(3).


See pthread_attr_init(3).

See Also

pthread_attr_init(3), pthread_create(3), pthread_detach(3), pthread_join(3), pthreads(7)

Referenced By

pthread_attr_init(3), pthread_create(3), pthread_detach(3), pthread_getattr_default_np(3), pthread_getattr_np(3).

The man page pthread_attr_getdetachstate(3) is an alias of pthread_attr_setdetachstate(3).

2022-10-09 Linux man-pages 6.01