NAME

       pthread_exit - terminate calling thread

LIBRARY

       POSIX threads library (libpthread, -lpthread)

SYNOPSIS

       #include <pthread.h>

       [[noreturn]] void pthread_exit(void *retval);

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
       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 │
       └───────────────────────────────────────────────────────────────┴───────────────┴─────────┘

STANDARDS

       POSIX.1-2008.

HISTORY

       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)