1 .\" Copyright (c) 1996 John Birrell <jb@cimlogic.com.au>.
2 .\" All rights reserved.
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36 .Nd dynamic package initialization
38 .Fd #include <pthread.h>
44 .Fn pthread_once "pthread_once_t *once_control" "void (*init_routine)(void)"
48 by any thread in a process, with a given
52 with no arguments. Subsequent calls to
64 parameter is used to determine whether the associated initialization
65 routine has been called.
69 is not a cancellation point. However, if
71 is a cancellation point and is cancelled, the effect on
72 .Fa once_control is as if
85 has automatic storage duration or is not initialized by
86 .Fa PTHREAD_ONCE_INIT .
91 function will return zero. Otherwise an error number will be returned to
98 is expected to conform to IEEE
100 Std 1003.1c when it is published.