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INTEGRATION: CWS mhu12 (1.1.2); FILE ADDED

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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).
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Rüdiger Timm 2006-05-02 11:08:47 +00:00
parent dca1c17b96
commit 2d5120737b
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sal/inc/internal/once.h Normal file
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/*************************************************************************
*
* 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 */