pthread_cleanup_push(2)                         pthread_cleanup_push(2)

  pthread_cleanup_pop()

  NAME

    pthread_cleanup_pop(), pthread_cleanup_push() - establish and execute a
    thread's cleanup handlers

  SYNOPSIS

    #include 

    void pthread_cleanup_pop(int execute);
    void pthread_cleanup_push(void (*routine)(void*), void *arg);

  DESCRIPTION

    The pthread_cleanup_push(2) macro pushes the cleanup handler macro
    referenced by routine onto the calling thread's cancellation cleanup
    stack. If the specified macro is at the top of the stack, it is popped
    from the stack and executed with the argument referenced by arg under the
    following circumstances:

    *     When the thread exits (that is, pthread_exit(2) is called for the
          thread)
    *     The thread responds to a cancellation request (that is,
          pthread_cancel() is called for the thread)
    *     The thread calls pthread_cleanup_pop() with the execute argument set
          to a value other than 0.

    The pthread_cleanup_pop(2) macro removes the routine at the top of the
    calling thread's cancellation cleanup stack and, if execute is non-zero,
    calls it.

    Applications must ensure that pthread_cleanup_push() and
    pthread_cleanup_pop() are called in pairs within the same lexical scope.

  RETURN VALUES

    None.

  ERRORS

    None.

  SEE ALSO

    pthread_cancel(2)

    pthread_setcancelstate(2)

  USAGE NOTES

    All of these macros are thread safe.

    None of these macros are async-signal safe.