2020-08-11 09:10:23 +00:00
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// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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******************************************************************************
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*
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* Copyright (C) 1999-2011, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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******************************************************************************/
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/*----------------------------------------------------------------------------------
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*
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* Memory mapped file wrappers for use by the ICU Data Implementation
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*
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* Porting note: The implementation of these functions is very platform specific.
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* Not all platforms can do real memory mapping. Those that can't
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* still must implement these functions, getting the data into memory using
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* whatever means are available.
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*
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* These functions are part of the ICU internal implementation, and
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2021-10-28 06:15:28 +00:00
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* are not intended to be used directly by applications.
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2020-08-11 09:10:23 +00:00
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*
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*----------------------------------------------------------------------------------*/
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#ifndef __UMAPFILE_H__
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#define __UMAPFILE_H__
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#include "unicode/putil.h"
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#include "unicode/udata.h"
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#include "putilimp.h"
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U_CFUNC UBool uprv_mapFile(UDataMemory *pdm, const char *path, UErrorCode *status);
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U_CFUNC void uprv_unmapFile(UDataMemory *pData);
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/* MAP_NONE: no memory mapping, no file access at all */
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#define MAP_NONE 0
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#define MAP_WIN32 1
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#define MAP_POSIX 2
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#define MAP_STDIO 3
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#define MAP_390DLL 4
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#if UCONFIG_NO_FILE_IO
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# define MAP_IMPLEMENTATION MAP_NONE
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#elif U_PLATFORM_USES_ONLY_WIN32_API
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# define MAP_IMPLEMENTATION MAP_WIN32
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#elif U_HAVE_MMAP || U_PLATFORM == U_PF_OS390
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# if U_PLATFORM == U_PF_OS390 && defined (OS390_STUBDATA)
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/* No memory mapping for 390 batch mode. Fake it using dll loading. */
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# define MAP_IMPLEMENTATION MAP_390DLL
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# else
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# define MAP_IMPLEMENTATION MAP_POSIX
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# endif
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#else /* unknown platform, no memory map implementation: use stdio.h and uprv_malloc() instead */
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# define MAP_IMPLEMENTATION MAP_STDIO
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#endif
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#endif
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