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-rw-r--r--linuxthreads/linuxthreads.texi9
1 files changed, 9 insertions, 0 deletions
diff --git a/linuxthreads/linuxthreads.texi b/linuxthreads/linuxthreads.texi
index 7a98103b3e..2b3647aed0 100644
--- a/linuxthreads/linuxthreads.texi
+++ b/linuxthreads/linuxthreads.texi
@@ -1368,6 +1368,15 @@ record that initialization has been performed. Subsequent calls to
@code{pthread_once} with the same @code{once_control} argument do
nothing.
+If a thread is cancelled while executing @var{init_routine}
+the state of the @var{once_control} variable is reset so that
+a future call to @code{pthread_once} will call the routine again.
+
+If the process forks while one or more threads are executing
+@code{pthread_once} initialization routines, the states of their respective
+@var{once_control} variables will appear to be reset in the child process so
+that if the child calls @code{pthread_once}, the routines will be executed.
+
@code{pthread_once} always returns 0.
@end deftypefun