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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 corresponding destructor functions are called, in an unspecified order.

       When a thread terminates, process-shared resources (e.g.,  mutexes,  condition  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 func‐
       tions registered using atexit(3) are called.

RETURN VALUE
       This function does not return to the caller.

ERRORS
       This function always succeeds.

ATTRIBUTES
   Multithreading (see pthreads(7))
       The pthread_exit() function is thread-safe.

CONFORMING TO
       POSIX.1-2001.

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 signal 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 3.74 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 http://www.kernel.org/doc/man-pages/.



Linux                                       2014-05-23                            PTHREAD_EXIT(3)


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