55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/* Copyright (C) 2002 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include "pthreadP.h"
|
|
#include <lowlevellock.h>
|
|
|
|
|
|
|
|
static lll_lock_t once_lock = LLL_LOCK_INITIALIZER;
|
|
|
|
|
|
int
|
|
__pthread_once (once_control, init_routine)
|
|
pthread_once_t *once_control;
|
|
void (*init_routine) (void);
|
|
{
|
|
/* XXX Depending on whether the LOCK_IN_ONCE_T is defined use a
|
|
global lock variable or one which is part of the pthread_once_t
|
|
object. */
|
|
if (*once_control == PTHREAD_ONCE_INIT)
|
|
{
|
|
lll_lock (once_lock);
|
|
|
|
/* XXX This implementation is not complete. It doesn't take
|
|
cancelation and fork into account. */
|
|
if (*once_control == PTHREAD_ONCE_INIT)
|
|
{
|
|
init_routine ();
|
|
|
|
*once_control = !PTHREAD_ONCE_INIT;
|
|
}
|
|
|
|
lll_unlock (once_lock);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
strong_alias (__pthread_once, pthread_once)
|