HP-UX Reference (11i v2 04/09) - 3 Library Functions N-Z (vol 7)

pthread_once(3T) pthread_once(3T)

(Pthread Library)

Rest of the code after initialization.

For a multithreaded process, a simple initialization ﬂag is not sufﬁcient; the ﬂag must be protected

against modiﬁcation by multiple threads. Consequently, this ﬂag has to be protected by a mutex that has

to be initialized only once, and so on. A multithreaded program should use initialization similar to:

static pthread_once_t once_control = PTHREAD_ONCE_INIT;

extern void initialize();

(void)pthread_once(&once_control, initialize);

Rest of the code after initialization.

AUTHOR

pthread_once()

was derived from the IEEE POSIX P1003.1c standard.