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

       pthread_exit - terminate calling thread

       #include <pthread.h>

       void pthread_exit(void *retval);

       Compile and link with -pthread.

       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

       This function does not return to the caller.

       This function always succeeds.

       For an explanation of the terms used in this section, see

       │Interface      Attribute     Value   │
       │pthread_exit() │ Thread safety │ MT-Safe │
       POSIX.1-2001, POSIX.1-2008.

       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.

       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().

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

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       description of the project, information about reporting bugs, and the
       latest version of this page, can be found at

Linux                             2017-09-15                   PTHREAD_EXIT(3)