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



NAME
       pthread_exit - terminate calling thread

SYNOPSIS
       #include <pthread.h>

       void pthread_exit(void *retval);

       Compile and link with -pthread.

DESCRIPTION
       The pthread_exit() function terminates the calling thread and returns a
       value via retval that (if the  thread  is  joinable)  is	 available  to
       another thread in the same process that calls pthread_join(3).

       Any  clean-up handlers established by pthread_cleanup_push(3) that have
       not yet been popped, are popped (in the reverse of the order  in	 which
       they  were pushed) and executed.	 If the thread has any thread-specific
       data, then, after the clean-up handlers have been executed, the	corre-
       sponding destructor functions are called, in an unspecified order.

       When a thread terminates, process-shared resources (e.g., mutexes, con-
       dition variables, semaphores, and file descriptors) are	not  released,
       and functions registered using atexit(3) are not called.

       After  the  last thread in a process terminates, the process terminates
       as by calling exit(3) with an exit status of zero; thus, process-shared
       resources  are  released	 and  functions registered using atexit(3) are
       called.

RETURN VALUE
       This function does not return to the caller.

ERRORS
       This function always succeeds.

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

       +---------------+---------------+---------+
       |Interface      | Attribute     | Value	 |
       +---------------+---------------+---------+
       |pthread_exit() | Thread safety | MT-Safe |
       +---------------+---------------+---------+
CONFORMING TO
       POSIX.1-2001, POSIX.1-2008.

NOTES
       Performing  a  return  from the start function of any thread other than
       the main thread results in an implicit call  to	pthread_exit(),	 using
       the function's return value as the thread's exit status.

       To  allow  other	 threads to continue execution, the main thread should
       terminate by calling pthread_exit() rather than exit(3).

       The value pointed to by retval should not be  located  on  the  calling
       thread's	 stack,	 since	the contents of that stack are undefined after
       the thread terminates.

BUGS
       Currently, there are limitations in the kernel implementation logic for
       wait(2)ing  on  a stopped thread group with a dead thread group leader.
       This can manifest in problems such as a locked terminal if a stop  sig-
       nal  is	sent  to  a  foreground	 process whose thread group leader has
       already called pthread_exit().

SEE ALSO
       pthread_create(3), pthread_join(3), pthreads(7)

COLOPHON
       This page is part of release 4.10 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				  2015-08-08		       PTHREAD_EXIT(3)