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98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* This file must be included first by every library source file.
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*/
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#ifndef _LVM_LIB_H
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#define _LVM_LIB_H
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#include "configure.h"
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#define _REENTRANT
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#define _GNU_SOURCE
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/*
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* Symbol export control macros
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*
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* DM_EXPORT_SYMBOL(func,ver)
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* DM_EXPORT_SYMBOL_BASE(func,ver)
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*
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* For functions that have multiple implementations these macros control
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* symbol export and versioning.
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*
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* Function definitions that exist in only one version never need to use
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* these macros.
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*
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* Backwards compatible implementations must include a version tag of
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* the form "_v1_02_104" as a suffix to the function name and use the
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* macro DM_EXPORT_SYMBOL to export the function and bind it to the
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* specified version string.
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*
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* Since versioning is only available when compiling with GCC the entire
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* compatibility version should be enclosed in '#if defined(__GNUC__)',
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* for example:
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*
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* int dm_foo(int bar)
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* {
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* return bar;
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* }
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*
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* #if defined(__GNUC__)
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* // Backward compatible dm_foo() version 1.02.104
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* int dm_foo_v1_02_104(void);
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* int dm_foo_v1_02_104(void)
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* {
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* return 0;
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* }
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* DM_EXPORT_SYMBOL(dm_foo,1_02_104)
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* #endif
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*
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* A prototype for the compatibility version is required as these
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* functions must not be declared static.
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*
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* The DM_EXPORT_SYMBOL_BASE macro is only used to export the base
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* versions of library symbols prior to the introduction of symbol
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* versioning: it must never be used for new symbols.
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*/
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#if defined(__GNUC__)
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#define DM_EXPORT_SYMBOL(func, ver) \
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__asm__(".symver " #func "_v" #ver ", " #func "@DM_" #ver )
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#define DM_EXPORT_SYMBOL_BASE(func) \
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__asm__(".symver " #func "_base, " #func "@Base" )
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#else
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#define DM_EXPORT_SYMBOL(func, ver)
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#define DM_EXPORT_SYMBOL_BASE(func)
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#endif
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#include "lib/misc/intl.h"
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#include "device_mapper/all.h"
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#include "lib/misc/util.h"
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#include "base/memory/zalloc.h"
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#ifdef DM
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# include "libdm/misc/dm-logging.h"
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#else
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# include "lib/log/lvm-logging.h"
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# include "lib/misc/lvm-globals.h"
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# include "lib/misc/lvm-wrappers.h"
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# include "lib/misc/lvm-maths.h"
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#endif
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#include <unistd.h>
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#endif
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