summaryrefslogtreecommitdiff
path: root/ports/sysdeps/unix/sysv/linux/ia64/nptl/pthread_once.c
diff options
context:
space:
mode:
authorMike Frysinger <vapier@gentoo.org>2014-02-15 22:07:25 -0500
committerMike Frysinger <vapier@gentoo.org>2014-02-16 01:12:38 -0500
commitc70a4b1db0cf5e813ae24b0fa96a352399eb6edf (patch)
tree5a36b0f0955682ae5232907d04fdf68589990783 /ports/sysdeps/unix/sysv/linux/ia64/nptl/pthread_once.c
parent591aeaf7a99bc9aa9179f013114d92496952dced (diff)
ia64: relocate out of ports/ subdir
Diffstat (limited to 'ports/sysdeps/unix/sysv/linux/ia64/nptl/pthread_once.c')
-rw-r--r--ports/sysdeps/unix/sysv/linux/ia64/nptl/pthread_once.c93
1 files changed, 0 insertions, 93 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/ia64/nptl/pthread_once.c b/ports/sysdeps/unix/sysv/linux/ia64/nptl/pthread_once.c
deleted file mode 100644
index a231e55879..0000000000
--- a/ports/sysdeps/unix/sysv/linux/ia64/nptl/pthread_once.c
+++ /dev/null
@@ -1,93 +0,0 @@
-/* Copyright (C) 2003-2014 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
-
- 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>
-
-
-unsigned long int __fork_generation attribute_hidden;
-
-
-static void
-clear_once_control (void *arg)
-{
- pthread_once_t *once_control = (pthread_once_t *) arg;
-
- *once_control = 0;
- lll_futex_wake (once_control, INT_MAX, LLL_PRIVATE);
-}
-
-
-int
-__pthread_once (once_control, init_routine)
- pthread_once_t *once_control;
- void (*init_routine) (void);
-{
- while (1)
- {
- int oldval, val, newval;
-
- val = *once_control;
- do
- {
- /* Check if the initialized has already been done. */
- if ((val & 2) != 0)
- return 0;
-
- oldval = val;
- newval = (oldval & 3) | __fork_generation | 1;
- val = atomic_compare_and_exchange_val_acq (once_control, newval,
- oldval);
- }
- while (__builtin_expect (val != oldval, 0));
-
- /* Check if another thread already runs the initializer. */
- if ((oldval & 1) != 0)
- {
- /* Check whether the initializer execution was interrupted
- by a fork. */
- if (((oldval ^ newval) & -4) == 0)
- {
- /* Same generation, some other thread was faster. Wait. */
- lll_futex_wait (once_control, newval, LLL_PRIVATE);
- continue;
- }
- }
-
- /* This thread is the first here. Do the initialization.
- Register a cleanup handler so that in case the thread gets
- interrupted the initialization can be restarted. */
- pthread_cleanup_push (clear_once_control, once_control);
-
- init_routine ();
-
- pthread_cleanup_pop (0);
-
-
- /* Add one to *once_control. */
- atomic_increment (once_control);
-
- /* Wake up all other threads. */
- lll_futex_wake (once_control, INT_MAX, LLL_PRIVATE);
- break;
- }
-
- return 0;
-}
-weak_alias (__pthread_once, pthread_once)
-hidden_def (__pthread_once)