From eb0a3d0cab507fecefe390a340f74ab8e5cf7831 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Sat, 28 Oct 2006 05:15:26 +0000 Subject: * sysdeps/pthread/pthread_barrier_wait.c: Move to... * pthread_barrier_wait.c: ...here. * sysdeps/pthread/pthread_cond_broadcast.c: Move to... * pthread_cond_broadcast.c: ...here. * sysdeps/pthread/pthread_cond_signal.c: Move to... * pthread_cond_signal.c: ...here. * sysdeps/pthread/pthread_cond_timedwait.c: Move to... * pthread_cond_timedwait.c: ...here. * sysdeps/pthread/pthread_cond_wait.c: Move to... * pthread_cond_wait.c: ...here. * sysdeps/pthread/pthread_once.c: Move to... * pthread_once.c: ...here. * sysdeps/pthread/pthread_rwlock_rdlock.c: Move to... * pthread_rwlock_rdlock.c: ...here. * sysdeps/pthread/pthread_rwlock_timedrdlock.c: Move to... * pthread_rwlock_timedrdlock.c: ...here. * sysdeps/pthread/pthread_rwlock_timedwrlock.c: Move to... * pthread_rwlock_timedwrlock.c: ...here. * sysdeps/pthread/pthread_rwlock_unlock.c: Move to... * pthread_rwlock_unlock.c: ...here. * sysdeps/pthread/pthread_rwlock_wrlock.c: Move to... * pthread_rwlock_wrlock.c: ...here. * sysdeps/pthread/pthread_spin_destroy.c: Move to... * pthread_spin_destroy.c: ...here. * sysdeps/pthread/pthread_spin_init.c: Move to... * pthread_spin_init.c: ...here. * sysdeps/pthread/pthread_spin_unlock.c: Move to... * pthread_spin_unlock.c: ...here. * sysdeps/pthread/pthread_getcpuclockid.c: Move to... * pthread_getcpuclockid.c: ...here. --- nptl/pthread_once.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 nptl/pthread_once.c (limited to 'nptl/pthread_once.c') diff --git a/nptl/pthread_once.c b/nptl/pthread_once.c new file mode 100644 index 0000000000..9b2cef8645 --- /dev/null +++ b/nptl/pthread_once.c @@ -0,0 +1,54 @@ +/* Copyright (C) 2002 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , 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 + + + +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) -- cgit v1.2.3