pthread_self(3) [bsd man page]

PTHREAD_SELF(3) 					     Linux Programmer's Manual						   PTHREAD_SELF(3)

NAME

       pthread_self - obtain ID of the calling thread

SYNOPSIS

       #include <pthread.h>

       pthread_t pthread_self(void);

       Compile and link with -pthread.

DESCRIPTION

       The  pthread_self()  function returns the ID of the calling thread.  This is the same value that is returned in *thread in the pthread_cre-
       ate(3) call that created this thread.

RETURN VALUE

       This function always succeeds, returning the calling thread's ID.

ERRORS

       This function always succeeds.

ATTRIBUTES

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

       +---------------+---------------+---------+
       |Interface      | Attribute     | Value	 |
       +---------------+---------------+---------+
       |pthread_self() | Thread safety | MT-Safe |
       +---------------+---------------+---------+
CONFORMING TO

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

NOTES

       POSIX.1 allows an implementation wide freedom in choosing the type used to represent a thread ID; for example, representation using  either
       an  arithmetic  type  or  a structure is permitted.  Therefore, variables of type pthread_t can't portably be compared using the C equality
       operator (==); use pthread_equal(3) instead.

       Thread identifiers should be considered opaque: any attempt to use a thread ID other than in pthreads calls is nonportable and can lead	to
       unspecified results.

       Thread  IDs  are  guaranteed to be unique only within a process.  A thread ID may be reused after a terminated thread has been joined, or a
       detached thread has terminated.

       The thread ID returned by pthread_self() is not the same thing as the kernel thread ID returned by a call to gettid(2).

SEE ALSO

       pthread_create(3), pthread_equal(3), pthreads(7)

COLOPHON

       This page is part of release 4.15 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/.

Linux								    2017-09-15							   PTHREAD_SELF(3)

PTHREAD_DETACH(3)					     Linux Programmer's Manual						 PTHREAD_DETACH(3)

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).

       +-----------------+---------------+---------+
       |Interface	 | Attribute	 | Value   |
       +-----------------+---------------+---------+
       |pthread_detach() | Thread safety | MT-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 any threads for which one of these actions has not been done will be 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 4.15 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/.

Linux								    2017-09-15							 PTHREAD_DETACH(3)