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authormarha <marha@users.sourceforge.net>2011-07-18 10:33:05 +0200
committermarha <marha@users.sourceforge.net>2011-07-18 10:33:05 +0200
commit88101146f2ec7d53ffb793e365f05097ffd35fd3 (patch)
treedb77eef572a00c62c8d9485c4786f682e20a2fd0 /pthreads/pthread_once.c
parent772373ccc8da2b2019555228f4972cc0c5a885a4 (diff)
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cvs version of pthreads
Diffstat (limited to 'pthreads/pthread_once.c')
-rw-r--r--pthreads/pthread_once.c165
1 files changed, 79 insertions, 86 deletions
diff --git a/pthreads/pthread_once.c b/pthreads/pthread_once.c
index 74add02c3..ef2c1f168 100644
--- a/pthreads/pthread_once.c
+++ b/pthreads/pthread_once.c
@@ -1,86 +1,79 @@
-/*
- * pthread_once.c
- *
- * Description:
- * This translation unit implements miscellaneous thread functions.
- *
- * --------------------------------------------------------------------------
- *
- * Pthreads-win32 - POSIX Threads Library for Win32
- * Copyright(C) 1998 John E. Bossom
- * Copyright(C) 1999,2005 Pthreads-win32 contributors
- *
- * Contact Email: rpj@callisto.canberra.edu.au
- *
- * The current list of contributors is contained
- * in the file CONTRIBUTORS included with the source
- * code distribution. The list can also be seen at the
- * following World Wide Web location:
- * http://sources.redhat.com/pthreads-win32/contributors.html
- *
- * This 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 of the License, or (at your option) any later version.
- *
- * This 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 this library in the file COPYING.LIB;
- * if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
- */
-
-#include "pthread.h"
-#include "implement.h"
-
-
-static void PTW32_CDECL
-ptw32_once_on_init_cancel (void * arg)
-{
- /* when the initing thread is cancelled we have to release the lock */
- ptw32_mcs_local_node_t *node = (ptw32_mcs_local_node_t *)arg;
- ptw32_mcs_lock_release(node);
-}
-
-int
-pthread_once (pthread_once_t * once_control, void (*init_routine) (void))
-{
- if (once_control == NULL || init_routine == NULL)
- {
- return EINVAL;
- }
-
- if (!InterlockedExchangeAdd((LPLONG)&once_control->done, 0)) /* MBR fence */
- {
- ptw32_mcs_local_node_t node;
-
- ptw32_mcs_lock_acquire((ptw32_mcs_lock_t *)&once_control->lock, &node);
-
- if (!once_control->done)
- {
-
-#ifdef _MSC_VER
-#pragma inline_depth(0)
-#endif
-
- pthread_cleanup_push(ptw32_once_on_init_cancel, (void *)&node);
- (*init_routine)();
- pthread_cleanup_pop(0);
-
-#ifdef _MSC_VER
-#pragma inline_depth()
-#endif
-
- once_control->done = PTW32_TRUE;
- }
-
- ptw32_mcs_lock_release(&node);
- }
-
- return 0;
-
-} /* pthread_once */
+/*
+ * pthread_once.c
+ *
+ * Description:
+ * This translation unit implements miscellaneous thread functions.
+ *
+ * --------------------------------------------------------------------------
+ *
+ * Pthreads-win32 - POSIX Threads Library for Win32
+ * Copyright(C) 1998 John E. Bossom
+ * Copyright(C) 1999,2005 Pthreads-win32 contributors
+ *
+ * Contact Email: rpj@callisto.canberra.edu.au
+ *
+ * The current list of contributors is contained
+ * in the file CONTRIBUTORS included with the source
+ * code distribution. The list can also be seen at the
+ * following World Wide Web location:
+ * http://sources.redhat.com/pthreads-win32/contributors.html
+ *
+ * This 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 of the License, or (at your option) any later version.
+ *
+ * This 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 this library in the file COPYING.LIB;
+ * if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include "pthread.h"
+#include "implement.h"
+
+int
+pthread_once (pthread_once_t * once_control, void (*init_routine) (void))
+{
+ if (once_control == NULL || init_routine == NULL)
+ {
+ return EINVAL;
+ }
+
+ if ((PTW32_INTERLOCKED_LONG)PTW32_FALSE ==
+ (PTW32_INTERLOCKED_LONG)PTW32_INTERLOCKED_EXCHANGE_ADD_LONG((PTW32_INTERLOCKED_LONGPTR)&once_control->done,
+ (PTW32_INTERLOCKED_LONG)0)) /* MBR fence */
+ {
+ ptw32_mcs_local_node_t node;
+
+ ptw32_mcs_lock_acquire((ptw32_mcs_lock_t *)&once_control->lock, &node);
+
+ if (!once_control->done)
+ {
+
+#if defined(_MSC_VER) && _MSC_VER < 1400
+#pragma inline_depth(0)
+#endif
+
+ pthread_cleanup_push(ptw32_mcs_lock_release, &node);
+ (*init_routine)();
+ pthread_cleanup_pop(0);
+
+#if defined(_MSC_VER) && _MSC_VER < 1400
+#pragma inline_depth()
+#endif
+
+ once_control->done = PTW32_TRUE;
+ }
+
+ ptw32_mcs_lock_release(&node);
+ }
+
+ return 0;
+
+} /* pthread_once */