INTEGRATION: CWS mhu12 (1.1.2); FILE ADDED

2006/04/11 16:52:01 mhu 1.1.2.1: #125511# #i23172# #i57754# module sal internal header for 'sal_once_type' (see also pthread_once_t).

1 files changed, 85 insertions, 0 deletions

diff --git a/sal/inc/internal/once.h b/sal/inc/internal/once.h
new file mode 100644
index 000000000000..97a2ad7bc6cc
--- /dev/null
+++ b/sal/inc/internal/once.h
@@ -0,0 +1,85 @@
+/*************************************************************************
+ *
+ *  OpenOffice.org - a multi-platform office productivity suite
+ *
+ *  $RCSfile: once.h,v $
+ *
+ *  $Revision: 1.2 $
+ *
+ *  last change: $Author: rt $ $Date: 2006-05-02 12:08:47 $
+ *
+ *  The Contents of this file are made available subject to
+ *  the terms of GNU Lesser General Public License Version 2.1.
+ *
+ *
+ *    GNU Lesser General Public License Version 2.1
+ *    =============================================
+ *    Copyright 2005 by Sun Microsystems, Inc.
+ *    901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ *    This library is free software; you can redistribute it and/or
+ *    modify it under the terms of the GNU Lesser General Public
+ *    License version 2.1, as published by the Free Software Foundation.
+ *
+ *    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; if not, write to the Free Software
+ *    Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ *    MA  02111-1307  USA
+ *
+ ************************************************************************/
+
+#ifndef INCLUDED_SAL_INTERNAL_ONCE_H
+#define INCLUDED_SAL_INTERNAL_ONCE_H
+
+/** sal_once_type
+ *  (platform dependent)
+ */
+
+#if defined(SAL_UNX)
+
+#include <pthread.h>
+
+typedef pthread_once_t sal_once_type;
+
+#define SAL_ONCE_INIT PTHREAD_ONCE_INIT
+#define SAL_ONCE(once, init) pthread_once((once), (init))
+
+#elif defined(SAL_W32)
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+typedef struct sal_once_st sal_once_type;
+struct sal_once_st
+{
+    LONG volatile m_done;
+    LONG volatile m_lock;
+};
+
+#define SAL_ONCE_INIT { 0, 0 }
+#define SAL_ONCE(once, init) \
+{ \
+    sal_once_type * control = (once); \
+    if (!(control->m_done)) \
+    { \
+        while (InterlockedExchange(&(control->m_lock), 1) == 1) Sleep(0); \
+        if (!(control->m_done)) \
+        { \
+            void (*init_routine)(void) = (init); \
+            (*init_routine)(); \
+            control->m_done = 1; \
+        } \
+        InterlockedExchange(&(control->m_lock), 0); \
+    } \
+}
+
+#else
+#error Unknown platform
+#endif /* SAL_UNX | SAL_W32 */
+
+#endif /* INCLUDED_SAL_INTERNAL_ONCE_H */