Update

[l4.git] / l4 / pkg / l4re-core / uclibc / lib / contrib / uclibc / libpthread / nptl / sysdeps / pthread / pthread_once.c

diff --git a/l4/pkg/l4re-core/uclibc/lib/contrib/uclibc/libpthread/nptl/sysdeps/pthread/pthread_once.c b/l4/pkg/l4re-core/uclibc/lib/contrib/uclibc/libpthread/nptl/sysdeps/pthread/pthread_once.c
new file mode 100644 (file)
index 0000000..d208471
--- /dev/null
+++ b/l4/pkg/l4re-core/uclibc/lib/contrib/uclibc/libpthread/nptl/sysdeps/pthread/pthread_once.c
@@ -0,0 +1,53 @@
+/* Copyright (C) 2002, 2007 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "pthreadP.h"
+#include <lowlevellock.h>
+
+
+
+static int once_lock = LLL_LOCK_INITIALIZER;
+
+
+int
+__pthread_once (
+     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, LLL_PRIVATE);
+
+      /* XXX This implementation is not complete.  It doesn't take
+        cancellation and fork into account.  */
+      if (*once_control == PTHREAD_ONCE_INIT)
+       {
+         init_routine ();
+
+         *once_control = !PTHREAD_ONCE_INIT;
+       }
+
+      lll_unlock (once_lock, LLL_PRIVATE);
+    }
+
+  return 0;
+}
+strong_alias (__pthread_once, pthread_once)