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Diffstat (limited to 'sal/inc/internal/once.h')
-rw-r--r-- | sal/inc/internal/once.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/sal/inc/internal/once.h b/sal/inc/internal/once.h new file mode 100644 index 000000000000..4438f281215c --- /dev/null +++ b/sal/inc/internal/once.h @@ -0,0 +1,79 @@ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org 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 version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ + +#ifndef INCLUDED_SAL_INTERNAL_ONCE_H +#define INCLUDED_SAL_INTERNAL_ONCE_H + +/** sal_once_type + * (platform dependent) + */ + +#if defined(SAL_UNX) || defined(SAL_OS2) + +#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 +#pragma warning(push,1) /* disable warnings within system headers */ +#include <windows.h> +#pragma warning(pop) + +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 */ |