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authorUlrich Drepper <drepper@redhat.com>2006-10-28 05:15:26 +0000
committerUlrich Drepper <drepper@redhat.com>2006-10-28 05:15:26 +0000
commiteb0a3d0cab507fecefe390a340f74ab8e5cf7831 (patch)
treec97ac1c33a78c454c0aeb520624af29c724355d2 /nptl/pthread_once.c
parent006a8f6f626e6e4d30b73c2ee20377b6a8cce1b7 (diff)
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* 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.
Diffstat (limited to 'nptl/pthread_once.c')
-rw-r--r--nptl/pthread_once.c54
1 files changed, 54 insertions, 0 deletions
diff --git a/nptl/pthread_once.c b/nptl/pthread_once.c
new file mode 100644
index 0000000..9b2cef8
--- /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 <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)