c44e49e82c
git-svn-id: https://svn.code.sf.net/p/flaim/code/trunk@643 0109f412-320b-0410-ab79-c3e0c5ffbbe6
1039 lines
22 KiB
C++
1039 lines
22 KiB
C++
//------------------------------------------------------------------------------
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// Desc: This file contains the F_64BitFile class
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//
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// Tabs: 3
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//
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// Copyright (c) 2001,2003-2006 Novell, Inc. All Rights Reserved.
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of version 2 of the GNU General Public
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// License as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, contact Novell, Inc.
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//
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// To contact Novell about this file by physical or electronic mail,
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// you may find current contact information at www.novell.com
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//
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// $Id: f64bitfh.cpp 3111 2006-01-19 13:10:50 -0700 (Thu, 19 Jan 2006) dsanders $
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//------------------------------------------------------------------------------
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#include "ftksys.h"
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#define F_MULTI_FHDL_LIST_SIZE 8
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#define F_MULTI_FHDL_DEFAULT_MAX_FILE_SIZE ((FLMUINT)0xFFFFFFFF)
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/****************************************************************************
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Desc:
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****************************************************************************/
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typedef struct
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{
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IF_FileHdl * pFileHdl;
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FLMUINT uiFileNum;
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FLMBOOL bDirty;
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} FH_INFO;
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/****************************************************************************
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Desc:
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****************************************************************************/
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class F_MultiFileHdl : public IF_MultiFileHdl
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{
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public:
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F_MultiFileHdl(
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FLMUINT uiMaxFileSize = F_MULTI_FHDL_DEFAULT_MAX_FILE_SIZE);
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virtual ~F_MultiFileHdl();
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void FLMAPI close(
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FLMBOOL bDelete = FALSE);
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RCODE FLMAPI create(
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const char * pszPath);
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RCODE FLMAPI createUnique(
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const char * pszPath,
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const char * pszFileExtension);
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RCODE FLMAPI deleteMultiFile(
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const char * pszPath);
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RCODE FLMAPI open(
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const char * pszPath);
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RCODE FLMAPI flush( void);
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RCODE FLMAPI read(
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FLMUINT64 ui64Offset,
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FLMUINT uiLength,
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void * pvBuffer,
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FLMUINT * puiBytesRead);
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RCODE FLMAPI write(
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FLMUINT64 ui64Offset,
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FLMUINT uiLength,
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void * pvBuffer,
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FLMUINT * puiBytesWritten);
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RCODE FLMAPI getPath(
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char * pszFilePath);
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FINLINE RCODE FLMAPI size(
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FLMUINT64 * pui64FileSize)
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{
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*pui64FileSize = m_ui64EOF;
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return( NE_FLM_OK);
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}
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RCODE FLMAPI truncate(
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FLMUINT64 ui64NewSize);
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private:
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RCODE getFileHdl(
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FLMUINT uiFileNum,
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FLMBOOL bGetForWrite,
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IF_FileHdl ** ppFileHdl);
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RCODE createLockFile(
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const char * pszBasePath);
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FINLINE void releaseLockFile(
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const char * pszBasePath,
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FLMBOOL bDelete)
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{
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#ifndef FLM_UNIX
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F_UNREFERENCED_PARM( bDelete);
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F_UNREFERENCED_PARM( pszBasePath);
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#endif
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if( m_pLockFileHdl)
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{
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// Release the lock file
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(void)m_pLockFileHdl->close();
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m_pLockFileHdl->Release();
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m_pLockFileHdl = NULL;
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#ifdef FLM_UNIX
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if( bDelete)
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{
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IF_FileSystem * pFileSystem = f_getFileSysPtr();
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char szTmpPath[ F_PATH_MAX_SIZE];
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// Delete the lock file
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f_strcpy( szTmpPath, pszBasePath);
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pFileSystem->pathAppend( szTmpPath, "64.LCK");
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pFileSystem->deleteFile( szTmpPath);
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}
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#endif
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}
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}
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FINLINE void formatFileNum(
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FLMUINT uiFileNum,
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char * pszStr)
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{
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f_sprintf( pszStr, "%08X.64", (unsigned)uiFileNum);
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}
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RCODE getFileNum(
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const char * pszFileName,
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FLMUINT * puiFileNum);
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FINLINE void dataFilePath(
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FLMUINT uiFileNum,
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char * pszPath)
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{
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char szFileName[ 13];
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IF_FileSystem * pFileSystem = f_getFileSysPtr();
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f_strcpy( pszPath, m_szPath);
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formatFileNum( uiFileNum, szFileName);
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pFileSystem->pathAppend( pszPath, szFileName);
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}
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FINLINE FLMUINT getFileNum(
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FLMUINT64 ui64Offset)
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{
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return( (FLMUINT)(ui64Offset / m_uiMaxFileSize));
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}
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FINLINE FLMUINT getFileOffset(
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FLMUINT64 ui64Offset)
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{
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return( (FLMUINT)(ui64Offset % m_uiMaxFileSize));
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}
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FH_INFO m_pFileHdlList[ F_MULTI_FHDL_LIST_SIZE];
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char m_szPath[ F_PATH_MAX_SIZE];
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FLMBOOL m_bOpen;
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FLMUINT64 m_ui64EOF;
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FLMUINT m_uiMaxFileSize;
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IF_FileHdl * m_pLockFileHdl;
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};
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/****************************************************************************
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Desc:
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****************************************************************************/
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RCODE FLMAPI FlmAllocMultiFileHdl(
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IF_MultiFileHdl ** ppFileHdl)
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{
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if( (*ppFileHdl = f_new F_MultiFileHdl) == NULL)
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{
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return( RC_SET( NE_FLM_MEM));
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}
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return( NE_FLM_OK);
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}
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/****************************************************************************
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Desc:
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****************************************************************************/
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F_MultiFileHdl::F_MultiFileHdl(
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FLMUINT uiMaxFileSize)
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{
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m_bOpen = FALSE;
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m_szPath[ 0] = 0;
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m_ui64EOF = 0;
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m_pLockFileHdl = NULL;
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f_memset( m_pFileHdlList, 0, sizeof( FH_INFO) * F_MULTI_FHDL_LIST_SIZE);
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m_uiMaxFileSize = uiMaxFileSize;
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if( !m_uiMaxFileSize)
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{
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m_uiMaxFileSize = F_MULTI_FHDL_DEFAULT_MAX_FILE_SIZE;
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}
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}
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/****************************************************************************
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Desc:
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****************************************************************************/
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F_MultiFileHdl::~F_MultiFileHdl()
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{
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if( m_bOpen)
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{
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close();
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}
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f_assert( !m_pLockFileHdl);
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}
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/****************************************************************************
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Desc: Closes all data files associated with the object
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****************************************************************************/
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void F_MultiFileHdl::close(
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FLMBOOL bDelete)
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{
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RCODE rc = NE_FLM_OK;
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FLMUINT uiLoop;
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IF_DirHdl * pDir = NULL;
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char szTmpPath[ F_PATH_MAX_SIZE];
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IF_FileSystem * pFileSystem = f_getFileSysPtr();
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if( !m_bOpen)
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{
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return;
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}
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for( uiLoop = 0; uiLoop < F_MULTI_FHDL_LIST_SIZE; uiLoop++)
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{
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if( m_pFileHdlList[ uiLoop].pFileHdl)
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{
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if( m_pFileHdlList[ uiLoop].bDirty)
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{
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(void)m_pFileHdlList[ uiLoop].pFileHdl->flush();
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}
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m_pFileHdlList[ uiLoop].pFileHdl->close();
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m_pFileHdlList[ uiLoop].pFileHdl->Release();
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f_memset( &m_pFileHdlList[ uiLoop], 0, sizeof( FH_INFO));
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}
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}
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m_ui64EOF = 0;
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m_bOpen = FALSE;
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if( bDelete)
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{
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if( RC_OK( pFileSystem->openDir(
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m_szPath, "*.64", &pDir)))
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{
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// Remove all data files
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for( rc = pDir->next(); !RC_BAD( rc) ; rc = pDir->next())
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{
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pDir->currentItemPath( szTmpPath);
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f_assert( f_strstr( szTmpPath, ".64") != 0);
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(void)pFileSystem->deleteFile( szTmpPath);
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}
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pDir->Release();
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pDir = NULL;
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}
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// Release and delete the lock file
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(void)releaseLockFile( m_szPath, TRUE);
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// Remove the directory
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(void)pFileSystem->removeDir( m_szPath);
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}
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else
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{
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(void)releaseLockFile( m_szPath, FALSE);
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}
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}
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/****************************************************************************
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Desc: Removes a 64-bit file
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****************************************************************************/
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RCODE F_MultiFileHdl::deleteMultiFile(
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const char * pszPath)
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{
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RCODE rc = NE_FLM_OK;
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IF_DirHdl * pDir = NULL;
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char szTmpPath[ F_PATH_MAX_SIZE];
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IF_FileSystem * pFileSystem = f_getFileSysPtr();
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// Can't use this handle to delete something if we already
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// have a file open.
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if( m_bOpen)
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{
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// Can't jump to exit, because it calls releaseLockFile
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return( RC_SET_AND_ASSERT( NE_FLM_FAILURE));
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}
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if( RC_BAD( rc = pFileSystem->doesFileExist( pszPath)))
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{
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goto Exit;
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}
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if( !pFileSystem->isDir( pszPath))
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{
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// If the path specifies a single file rather than a
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// 64-bit directory, just go ahead and delete the file.
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rc = pFileSystem->deleteFile( pszPath);
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goto Exit;
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}
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if( RC_BAD( rc = createLockFile( pszPath)))
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{
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goto Exit;
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}
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if( RC_OK( pFileSystem->openDir( pszPath, "*.64", &pDir)))
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{
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// Remove all data files
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for( rc = pDir->next(); !RC_BAD( rc) ; rc = pDir->next())
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{
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pDir->currentItemPath( szTmpPath);
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f_assert( f_strstr( szTmpPath, ".64") != 0);
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(void)pFileSystem->deleteFile( szTmpPath);
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}
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pDir->Release();
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pDir = NULL;
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rc = NE_FLM_OK;
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}
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// Release and delete the lock file
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(void)releaseLockFile( pszPath, TRUE);
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// Remove the directory
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(void)pFileSystem->removeDir( pszPath);
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Exit:
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(void)releaseLockFile( pszPath, FALSE);
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return( rc);
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}
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/****************************************************************************
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Desc: Creates a new 64-bit "file"
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****************************************************************************/
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RCODE F_MultiFileHdl::create(
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const char * pszPath)
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{
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RCODE rc = NE_FLM_OK;
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FLMBOOL bCreatedDir = FALSE;
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IF_FileSystem * pFileSystem = f_getFileSysPtr();
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if( m_bOpen)
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{
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rc = RC_SET_AND_ASSERT( NE_FLM_FAILURE);
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goto Exit;
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}
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if( RC_BAD( rc = pFileSystem->createDir( pszPath)))
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{
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goto Exit;
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}
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f_strcpy( m_szPath, pszPath);
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bCreatedDir = TRUE;
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|
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// Create the lock file
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if( RC_BAD( rc = createLockFile( m_szPath)))
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{
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goto Exit;
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}
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|
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// Initialize the EOF to 0 and set the state to open
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m_ui64EOF = 0;
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m_bOpen = TRUE;
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Exit:
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// Release the lock file
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if( RC_BAD( rc))
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{
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(void)releaseLockFile( m_szPath, TRUE);
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if( bCreatedDir)
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{
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(void)pFileSystem->removeDir( m_szPath);
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}
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}
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return( rc);
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}
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/****************************************************************************
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Desc: Creates a new 64-bit file with a unique, generated name
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****************************************************************************/
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RCODE F_MultiFileHdl::createUnique(
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const char * pszPath, // Directory where the file is to be created
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const char * pszFileExtension) // Extension to be used on the new file.
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{
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RCODE rc = NE_FLM_OK;
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FLMUINT uiCount;
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FLMBOOL bModext = TRUE;
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FLMBOOL bCreatedDir = FALSE;
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FLMUINT uiBaseTime = 0;
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FLMBYTE ucHighByte = 0;
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char szDirName[ F_FILENAME_SIZE];
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char szTmpPath[ F_PATH_MAX_SIZE];
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char szBasePath[ F_PATH_MAX_SIZE];
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IF_FileSystem * pFileSystem = f_getFileSysPtr();
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if( m_bOpen)
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{
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rc = RC_SET_AND_ASSERT( NE_FLM_FAILURE);
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goto Exit;
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}
|
|
|
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if( !pszPath || pszPath[ 0] == '\0')
|
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{
|
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#if defined( FLM_UNIX)
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f_strcpy( szBasePath, "./");
|
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#elif defined( FLM_NLM)
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f_strcpy( szBasePath, "SYS:_NETWARE");
|
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#else
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szBasePath[ 0] = '\0';
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#endif
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}
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else
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{
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f_strcpy( szBasePath, pszPath);
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}
|
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|
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if ((pszFileExtension) && (f_strlen( pszFileExtension) >= 3))
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{
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bModext = FALSE;
|
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}
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|
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uiCount = 0;
|
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szDirName[ 0] = '\0';
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do
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{
|
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pFileSystem->pathCreateUniqueName( &uiBaseTime, szDirName,
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pszFileExtension, &ucHighByte, bModext);
|
|
|
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f_strcpy( szTmpPath, szBasePath);
|
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pFileSystem->pathAppend( szTmpPath, szDirName);
|
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rc = pFileSystem->createDir( szTmpPath);
|
|
} while ((rc != NE_FLM_OK) && (uiCount++ < 20));
|
|
|
|
if( RC_BAD( rc))
|
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{
|
|
goto Exit;
|
|
}
|
|
|
|
f_strcpy( m_szPath, szTmpPath);
|
|
bCreatedDir = TRUE;
|
|
|
|
// Create the lock file
|
|
|
|
if( RC_BAD( rc = createLockFile( m_szPath)))
|
|
{
|
|
goto Exit;
|
|
}
|
|
|
|
// Initialize the EOF to 0 and set the state to open
|
|
|
|
m_ui64EOF = 0;
|
|
m_bOpen = TRUE;
|
|
|
|
Exit:
|
|
|
|
// Release the lock file
|
|
|
|
if( RC_BAD( rc))
|
|
{
|
|
releaseLockFile( m_szPath, TRUE);
|
|
|
|
if( bCreatedDir)
|
|
{
|
|
(void)pFileSystem->removeDir( m_szPath);
|
|
}
|
|
}
|
|
|
|
return( rc);
|
|
}
|
|
|
|
/****************************************************************************
|
|
Desc: Opens an existing 64-bit file
|
|
****************************************************************************/
|
|
RCODE F_MultiFileHdl::open(
|
|
const char * pszPath)
|
|
{
|
|
RCODE rc = NE_FLM_OK;
|
|
IF_FileSystem * pFileSystem = f_getFileSysPtr();
|
|
IF_DirHdl * pDir = NULL;
|
|
FLMUINT uiTmp;
|
|
FLMUINT uiHighFileNum = 0;
|
|
FLMUINT64 ui64HighOffset = 0;
|
|
|
|
if( m_bOpen)
|
|
{
|
|
rc = RC_SET_AND_ASSERT( NE_FLM_FAILURE);
|
|
goto Exit;
|
|
}
|
|
|
|
if( RC_BAD( pFileSystem->doesFileExist( pszPath)) ||
|
|
!pFileSystem->isDir( pszPath))
|
|
{
|
|
rc = RC_SET( NE_FLM_IO_PATH_NOT_FOUND);
|
|
goto Exit;
|
|
}
|
|
|
|
f_strcpy( m_szPath, pszPath);
|
|
|
|
// Create the lock file
|
|
|
|
if( RC_BAD( rc = createLockFile( m_szPath)))
|
|
{
|
|
goto Exit;
|
|
}
|
|
|
|
// Need to determine the current EOF
|
|
|
|
if( RC_BAD( rc = pFileSystem->openDir( m_szPath, (char *)"*.64", &pDir)))
|
|
{
|
|
goto Exit;
|
|
}
|
|
|
|
// Find all data files to determine the EOF
|
|
|
|
for( rc = pDir->next(); !RC_BAD( rc); rc = pDir->next())
|
|
{
|
|
if( RC_OK( getFileNum( pDir->currentItemName(), &uiTmp)))
|
|
{
|
|
if( uiTmp >= uiHighFileNum)
|
|
{
|
|
uiHighFileNum = uiTmp;
|
|
ui64HighOffset = pDir->currentItemSize();
|
|
}
|
|
}
|
|
}
|
|
rc = NE_FLM_OK;
|
|
|
|
m_ui64EOF = (((FLMUINT64)uiHighFileNum) * m_uiMaxFileSize) + ui64HighOffset;
|
|
m_bOpen = TRUE;
|
|
|
|
Exit:
|
|
|
|
if( pDir)
|
|
{
|
|
pDir->Release();
|
|
}
|
|
|
|
// Release the lock file
|
|
|
|
if( RC_BAD( rc))
|
|
{
|
|
releaseLockFile( m_szPath, FALSE);
|
|
}
|
|
|
|
return( rc);
|
|
}
|
|
|
|
/****************************************************************************
|
|
Desc: Flushes cached data to the data file(s)
|
|
****************************************************************************/
|
|
RCODE F_MultiFileHdl::flush( void)
|
|
{
|
|
FLMUINT uiLoop;
|
|
RCODE rc = NE_FLM_OK;
|
|
|
|
if( !m_bOpen)
|
|
{
|
|
rc = RC_SET_AND_ASSERT( NE_FLM_FAILURE);
|
|
goto Exit;
|
|
}
|
|
|
|
for( uiLoop = 0; uiLoop < F_MULTI_FHDL_LIST_SIZE; uiLoop++)
|
|
{
|
|
if( m_pFileHdlList[ uiLoop].bDirty)
|
|
{
|
|
if( RC_BAD( rc = m_pFileHdlList[ uiLoop].pFileHdl->flush()))
|
|
{
|
|
goto Exit;
|
|
}
|
|
m_pFileHdlList[ uiLoop].bDirty = FALSE;
|
|
}
|
|
}
|
|
|
|
Exit:
|
|
|
|
return( rc);
|
|
}
|
|
|
|
/****************************************************************************
|
|
Desc: Reads data from the file
|
|
****************************************************************************/
|
|
RCODE F_MultiFileHdl::read(
|
|
FLMUINT64 ui64Offset, // Offset to begin reading
|
|
FLMUINT uiLength, // Number of bytes to read
|
|
void * pvBuffer, // Buffer
|
|
FLMUINT * puiBytesRead) // [out] Number of bytes read
|
|
{
|
|
RCODE rc = NE_FLM_OK;
|
|
FLMUINT uiFileNum = getFileNum( ui64Offset);
|
|
FLMUINT uiFileOffset = getFileOffset( ui64Offset);
|
|
FLMUINT uiTmp;
|
|
FLMUINT uiTotalBytesRead = 0;
|
|
FLMUINT uiBytesToRead;
|
|
FLMUINT uiMaxReadLen;
|
|
IF_FileHdl * pFileHdl;
|
|
|
|
// Handle the case of a 0-byte read
|
|
|
|
if( !uiLength)
|
|
{
|
|
if( ui64Offset >= m_ui64EOF)
|
|
{
|
|
rc = RC_SET( NE_FLM_IO_END_OF_FILE);
|
|
}
|
|
goto Exit;
|
|
}
|
|
|
|
// Read the data file(s), moving to new files as needed.
|
|
|
|
for( ;;)
|
|
{
|
|
if( ui64Offset >= m_ui64EOF)
|
|
{
|
|
rc = RC_SET( NE_FLM_IO_END_OF_FILE);
|
|
goto Exit;
|
|
}
|
|
|
|
uiMaxReadLen = m_uiMaxFileSize - uiFileOffset;
|
|
f_assert( uiMaxReadLen != 0);
|
|
uiTmp = (uiLength >= uiMaxReadLen ? uiMaxReadLen : uiLength);
|
|
uiBytesToRead = (((FLMUINT64)uiTmp > (FLMUINT64)(m_ui64EOF - ui64Offset))
|
|
? (FLMUINT)(m_ui64EOF - ui64Offset)
|
|
: uiTmp);
|
|
|
|
if( RC_BAD( rc = getFileHdl( uiFileNum, FALSE, &pFileHdl)))
|
|
{
|
|
if( rc == NE_FLM_IO_PATH_NOT_FOUND)
|
|
{
|
|
// Handle the case of a sparse file by filling the unread
|
|
// portion of the buffer with zeros.
|
|
|
|
f_memset( pvBuffer, 0, uiBytesToRead);
|
|
uiTmp = uiBytesToRead;
|
|
rc = NE_FLM_OK;
|
|
}
|
|
else
|
|
{
|
|
goto Exit;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if( RC_BAD( rc = pFileHdl->read( uiFileOffset, uiBytesToRead,
|
|
pvBuffer, &uiTmp)))
|
|
{
|
|
if( rc == NE_FLM_IO_END_OF_FILE)
|
|
{
|
|
// Handle the case of a sparse file by filling the unread
|
|
// portion of the buffer with zeros.
|
|
|
|
f_memset( &(((FLMBYTE *)(pvBuffer))[ uiTmp]),
|
|
0, (FLMUINT)(uiBytesToRead - uiTmp));
|
|
uiTmp = uiBytesToRead;
|
|
rc = NE_FLM_OK;
|
|
}
|
|
else
|
|
{
|
|
goto Exit;
|
|
}
|
|
}
|
|
}
|
|
|
|
uiTotalBytesRead += uiTmp;
|
|
uiLength -= uiTmp;
|
|
if( !uiLength)
|
|
{
|
|
break;
|
|
}
|
|
|
|
// Set up for next read
|
|
|
|
pvBuffer = ((FLMBYTE *)pvBuffer) + uiTmp;
|
|
ui64Offset += uiTmp;
|
|
uiFileNum = getFileNum( ui64Offset);
|
|
uiFileOffset = getFileOffset( ui64Offset);
|
|
}
|
|
|
|
Exit:
|
|
|
|
*puiBytesRead = uiTotalBytesRead;
|
|
return( rc);
|
|
}
|
|
|
|
/****************************************************************************
|
|
Desc: Writes data to the file
|
|
****************************************************************************/
|
|
RCODE F_MultiFileHdl::write(
|
|
FLMUINT64 ui64Offset, // Offset
|
|
FLMUINT uiLength, // Number of bytes to write.
|
|
void * pvBuffer, // Buffer that contains bytes to be written
|
|
FLMUINT * puiBytesWritten) // Number of bytes written.
|
|
{
|
|
RCODE rc = NE_FLM_OK;
|
|
FLMUINT uiFileNum = getFileNum( ui64Offset);
|
|
FLMUINT uiFileOffset = getFileOffset( ui64Offset);
|
|
FLMUINT uiTmp;
|
|
FLMUINT uiTotalBytesWritten = 0;
|
|
FLMUINT uiBytesToWrite;
|
|
FLMUINT uiMaxWriteLen;
|
|
IF_FileHdl * pFileHdl;
|
|
|
|
// Don't allow zero-length writes
|
|
|
|
f_assert( uiLength);
|
|
|
|
// Write to the data file(s), moving to new files as needed.
|
|
|
|
for( ;;)
|
|
{
|
|
if( RC_BAD( rc = getFileHdl( uiFileNum, TRUE, &pFileHdl)))
|
|
{
|
|
goto Exit;
|
|
}
|
|
|
|
uiMaxWriteLen = m_uiMaxFileSize - uiFileOffset;
|
|
f_assert( uiMaxWriteLen != 0);
|
|
uiBytesToWrite = uiLength >= uiMaxWriteLen ? uiMaxWriteLen : uiLength;
|
|
|
|
uiTmp = 0;
|
|
rc = pFileHdl->write( uiFileOffset, uiBytesToWrite, pvBuffer, &uiTmp);
|
|
|
|
uiTotalBytesWritten += uiTmp;
|
|
uiLength -= uiTmp;
|
|
ui64Offset += uiTmp;
|
|
|
|
if( RC_BAD( rc))
|
|
{
|
|
goto Exit;
|
|
}
|
|
|
|
if( !uiLength)
|
|
{
|
|
break;
|
|
}
|
|
|
|
// Set up for next write
|
|
|
|
pvBuffer = ((FLMBYTE *)pvBuffer) + uiTmp;
|
|
uiFileNum = getFileNum( ui64Offset);
|
|
uiFileOffset = getFileOffset( ui64Offset);
|
|
}
|
|
|
|
Exit:
|
|
|
|
if( ui64Offset > m_ui64EOF)
|
|
{
|
|
m_ui64EOF = ui64Offset;
|
|
}
|
|
|
|
*puiBytesWritten = uiTotalBytesWritten;
|
|
return( rc);
|
|
}
|
|
|
|
/****************************************************************************
|
|
Desc: Returns the requested file handle
|
|
****************************************************************************/
|
|
RCODE F_MultiFileHdl::getFileHdl(
|
|
FLMUINT uiFileNum,
|
|
FLMBOOL bGetForWrite,
|
|
IF_FileHdl ** ppFileHdl)
|
|
{
|
|
RCODE rc = NE_FLM_OK;
|
|
IF_FileSystem * pFileSystem = f_getFileSysPtr();
|
|
FLMUINT uiSlot;
|
|
IF_FileHdl * pTmpHdl;
|
|
char szPath[ F_PATH_MAX_SIZE];
|
|
|
|
f_assert( m_bOpen);
|
|
|
|
*ppFileHdl = NULL;
|
|
|
|
uiSlot = uiFileNum % F_MULTI_FHDL_LIST_SIZE;
|
|
pTmpHdl = m_pFileHdlList[ uiSlot].pFileHdl;
|
|
|
|
if( pTmpHdl && m_pFileHdlList[ uiSlot].uiFileNum != uiFileNum)
|
|
{
|
|
if( RC_BAD( rc = pTmpHdl->flush()))
|
|
{
|
|
goto Exit;
|
|
}
|
|
|
|
pTmpHdl->close();
|
|
pTmpHdl->Release();
|
|
pTmpHdl = NULL;
|
|
|
|
f_memset( &m_pFileHdlList[ uiSlot], 0, sizeof( FH_INFO));
|
|
}
|
|
|
|
if( !pTmpHdl)
|
|
{
|
|
dataFilePath( uiFileNum, szPath);
|
|
if( RC_BAD( rc = pFileSystem->openFile( szPath,
|
|
FLM_IO_RDWR, &pTmpHdl)))
|
|
{
|
|
if( rc == NE_FLM_IO_PATH_NOT_FOUND && bGetForWrite)
|
|
{
|
|
if( RC_BAD( rc = pFileSystem->createFile( szPath,
|
|
FLM_IO_RDWR, &pTmpHdl)))
|
|
{
|
|
goto Exit;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
goto Exit;
|
|
}
|
|
}
|
|
|
|
m_pFileHdlList[ uiSlot].pFileHdl = pTmpHdl;
|
|
m_pFileHdlList[ uiSlot].uiFileNum = uiFileNum;
|
|
f_assert( !m_pFileHdlList[ uiSlot].bDirty);
|
|
}
|
|
|
|
*ppFileHdl = m_pFileHdlList[ uiSlot].pFileHdl;
|
|
if( bGetForWrite)
|
|
{
|
|
m_pFileHdlList[ uiSlot].bDirty = TRUE;
|
|
}
|
|
|
|
Exit:
|
|
|
|
return( rc);
|
|
}
|
|
|
|
/****************************************************************************
|
|
Desc: Given a data file name, returns the file's number
|
|
****************************************************************************/
|
|
RCODE F_MultiFileHdl::getFileNum(
|
|
const char * pszFileName,
|
|
FLMUINT * puiFileNum)
|
|
{
|
|
FLMUINT uiCnt = 0;
|
|
FLMUINT uiDigit;
|
|
FLMUINT uiFileNum = 0;
|
|
RCODE rc = NE_FLM_OK;
|
|
|
|
if( f_strlen( pszFileName) != 11) // XXXXXXXX.64
|
|
{
|
|
rc = RC_SET( NE_FLM_IO_INVALID_FILENAME);
|
|
goto Exit;
|
|
}
|
|
|
|
if( f_strcmp( &pszFileName[ 8], ".64") != 0)
|
|
{
|
|
rc = RC_SET( NE_FLM_IO_INVALID_FILENAME);
|
|
goto Exit;
|
|
}
|
|
|
|
while( uiCnt < 8)
|
|
{
|
|
uiDigit = pszFileName[ uiCnt];
|
|
if( uiDigit >= NATIVE_LOWER_A && uiDigit <= NATIVE_LOWER_F)
|
|
{
|
|
uiDigit = (FLMUINT)(uiDigit - NATIVE_LOWER_A) + 10;
|
|
}
|
|
else if( uiDigit >= NATIVE_UPPER_A && uiDigit <= NATIVE_UPPER_F)
|
|
{
|
|
uiDigit = (FLMUINT)(uiDigit - NATIVE_UPPER_A) + 10;
|
|
}
|
|
else if( uiDigit >= NATIVE_ZERO && uiDigit <= NATIVE_NINE)
|
|
{
|
|
uiDigit -= NATIVE_ZERO;
|
|
}
|
|
else
|
|
{
|
|
rc = RC_SET( NE_FLM_IO_INVALID_FILENAME);
|
|
goto Exit;
|
|
}
|
|
|
|
uiFileNum <<= 4;
|
|
uiFileNum += uiDigit;
|
|
uiCnt++;
|
|
}
|
|
|
|
*puiFileNum = uiFileNum;
|
|
|
|
Exit:
|
|
|
|
return( rc);
|
|
}
|
|
|
|
/****************************************************************************
|
|
Desc: This routine obtains exclusive access to a 64-bit file by creating
|
|
a .lck file. The object holds the .lck file open as long as the
|
|
64-bit file is open.
|
|
****************************************************************************/
|
|
RCODE F_MultiFileHdl::createLockFile(
|
|
const char * pszBasePath)
|
|
{
|
|
RCODE rc = NE_FLM_OK;
|
|
char szLockPath [F_PATH_MAX_SIZE];
|
|
F_FileHdl * pLockFileHdl = NULL;
|
|
FLMUINT uiIoFlags = FLM_IO_RDWR | FLM_IO_EXCL | FLM_IO_SH_DENYRW;
|
|
IF_FileSystem * pFileSystem = f_getFileSysPtr();
|
|
|
|
f_strcpy( szLockPath, pszBasePath);
|
|
pFileSystem->pathAppend( szLockPath, "64.LCK");
|
|
|
|
// Attempt to create the lock file. If it fails, the lock file
|
|
// may have been left because of a crash. Hence, we first try
|
|
// to delete the file. If that succeeds, we then attempt to
|
|
// create the file again. If it, or the 2nd create fail, we simply
|
|
// return an access denied error.
|
|
|
|
if( RC_BAD( rc = f_allocFileHdl( &pLockFileHdl)))
|
|
{
|
|
goto Exit;
|
|
}
|
|
|
|
#ifndef FLM_UNIX
|
|
// On Unix, we do not want to delete the file because it
|
|
// will succeed even if someone else has the file open.
|
|
|
|
uiIoFlags |= FLM_IO_DELETE_ON_RELEASE;
|
|
#endif
|
|
|
|
if( RC_BAD( pLockFileHdl->create( szLockPath, uiIoFlags)))
|
|
{
|
|
#ifndef FLM_UNIX
|
|
if (RC_BAD( pFileSystem->deleteFile( szLockPath)))
|
|
{
|
|
rc = RC_SET( NE_FLM_IO_ACCESS_DENIED);
|
|
goto Exit;
|
|
}
|
|
else if (RC_BAD( pLockFileHdl->create( szLockPath, uiIoFlags)))
|
|
{
|
|
rc = RC_SET( NE_FLM_IO_ACCESS_DENIED);
|
|
goto Exit;
|
|
}
|
|
#else
|
|
|
|
if( RC_BAD( pLockFileHdl->open( szLockPath, uiIoFlags)))
|
|
{
|
|
rc = RC_SET( NE_FLM_IO_ACCESS_DENIED);
|
|
goto Exit;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#ifdef FLM_UNIX
|
|
if( RC_BAD( pLockFileHdl->lock()))
|
|
{
|
|
rc = RC_SET( NE_FLM_IO_ACCESS_DENIED);
|
|
goto Exit;
|
|
}
|
|
#endif
|
|
|
|
m_pLockFileHdl = pLockFileHdl;
|
|
pLockFileHdl = NULL;
|
|
|
|
Exit:
|
|
|
|
if (pLockFileHdl)
|
|
{
|
|
(void)pLockFileHdl->close();
|
|
pLockFileHdl->Release();
|
|
pLockFileHdl = NULL;
|
|
}
|
|
return( rc);
|
|
}
|
|
|
|
/****************************************************************************
|
|
Desc: This is a private method that will truncate the spill file back to
|
|
the specified size.
|
|
****************************************************************************/
|
|
RCODE F_MultiFileHdl::truncate(
|
|
FLMUINT64 ui64NewSize)
|
|
{
|
|
RCODE rc = NE_FLM_OK;
|
|
FLMUINT uiFileNum = getFileNum( ui64NewSize);
|
|
IF_FileHdl * pFileHdl;
|
|
|
|
if( RC_BAD( rc = getFileHdl( uiFileNum, TRUE, &pFileHdl)))
|
|
{
|
|
goto Exit;
|
|
}
|
|
|
|
if (RC_BAD( rc = pFileHdl->truncate( getFileOffset( ui64NewSize))))
|
|
{
|
|
goto Exit;
|
|
}
|
|
|
|
Exit:
|
|
|
|
return( rc);
|
|
}
|
|
|
|
/****************************************************************************
|
|
Desc:
|
|
****************************************************************************/
|
|
RCODE FLMAPI F_MultiFileHdl::getPath(
|
|
char * pszPath)
|
|
{
|
|
f_strcpy( pszPath, m_szPath);
|
|
return( NE_FLM_OK);
|
|
}
|