LCOV - code coverage report
Current view: directory - netwerk/cache - nsDiskCacheStreams.h (source / functions) Found Hit Coverage
Test: app.info Lines: 5 5 100.0 %
Date: 2012-06-02 Functions: 2 2 100.0 %

       1                 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
       2                 :  *
       3                 :  * ***** BEGIN LICENSE BLOCK *****
       4                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       5                 :  *
       6                 :  * The contents of this file are subject to the Mozilla Public License Version
       7                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       8                 :  * the License. You may obtain a copy of the License at
       9                 :  * http://www.mozilla.org/MPL/
      10                 :  *
      11                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      12                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      13                 :  * for the specific language governing rights and limitations under the
      14                 :  * License.
      15                 :  *
      16                 :  * The Original Code is nsDiskCacheStreams.h, released
      17                 :  * June 13, 2001.
      18                 :  *
      19                 :  * The Initial Developer of the Original Code is
      20                 :  * Netscape Communications Corporation.
      21                 :  * Portions created by the Initial Developer are Copyright (C) 2001
      22                 :  * the Initial Developer. All Rights Reserved.
      23                 :  *
      24                 :  * Contributor(s):
      25                 :  *   Gordon Sheridan <gordon@netscape.com>
      26                 :  *
      27                 :  * Alternatively, the contents of this file may be used under the terms of
      28                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      29                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      30                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      31                 :  * of those above. If you wish to allow use of your version of this file only
      32                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      33                 :  * use your version of this file under the terms of the MPL, indicate your
      34                 :  * decision by deleting the provisions above and replace them with the notice
      35                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      36                 :  * the provisions above, a recipient may use your version of this file under
      37                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      38                 :  *
      39                 :  * ***** END LICENSE BLOCK ***** */
      40                 : 
      41                 : 
      42                 : #ifndef _nsDiskCacheStreams_h_
      43                 : #define _nsDiskCacheStreams_h_
      44                 : 
      45                 : #include "nsDiskCacheBinding.h"
      46                 : 
      47                 : #include "nsCache.h"
      48                 : 
      49                 : #include "nsIInputStream.h"
      50                 : #include "nsIOutputStream.h"
      51                 : 
      52                 : #include "pratom.h"
      53                 : 
      54                 : class nsDiskCacheInputStream;
      55                 : class nsDiskCacheOutputStream;
      56                 : class nsDiskCacheDevice;
      57                 : 
      58                 : class nsDiskCacheStreamIO : public nsISupports {
      59                 : public:
      60                 :              nsDiskCacheStreamIO(nsDiskCacheBinding *   binding);
      61                 :     virtual ~nsDiskCacheStreamIO();
      62                 :     
      63                 :     NS_DECL_ISUPPORTS
      64                 : 
      65                 :     nsresult    GetInputStream(PRUint32 offset, nsIInputStream ** inputStream);
      66                 :     nsresult    GetOutputStream(PRUint32 offset, nsIOutputStream ** outputStream);
      67                 : 
      68                 :     nsresult    CloseOutputStream(nsDiskCacheOutputStream * outputStream);
      69                 :     nsresult    CloseOutputStreamInternal(nsDiskCacheOutputStream * outputStream);
      70                 :         
      71                 :     nsresult    Write( const char * buffer,
      72                 :                        PRUint32     count,
      73                 :                        PRUint32 *   bytesWritten);
      74                 : 
      75                 :     nsresult    Seek(PRInt32 whence, PRInt32 offset);
      76                 :     nsresult    Tell(PRUint32 * position);    
      77                 :     nsresult    SetEOF();
      78                 : 
      79                 :     nsresult    ClearBinding();
      80                 :     
      81             172 :     void        IncrementInputStreamCount() { PR_ATOMIC_INCREMENT(&mInStreamCount); }
      82             172 :     void        DecrementInputStreamCount()
      83                 :                 {
      84             172 :                     PR_ATOMIC_DECREMENT(&mInStreamCount);
      85             172 :                     NS_ASSERTION(mInStreamCount >= 0, "mInStreamCount has gone negative");
      86             172 :                 }
      87                 : 
      88                 :     // GCC 2.95.2 requires this to be defined, although we never call it.
      89                 :     // and OS/2 requires that it not be private
      90                 :     nsDiskCacheStreamIO() { NS_NOTREACHED("oops"); }
      91                 : private:
      92                 : 
      93                 : 
      94                 :     void        Close();
      95                 :     nsresult    OpenCacheFile(PRIntn flags, PRFileDesc ** fd);
      96                 :     nsresult    ReadCacheBlocks();
      97                 :     nsresult    FlushBufferToFile();
      98                 :     void        UpdateFileSize();
      99                 :     void        DeleteBuffer();
     100                 :     nsresult    Flush();
     101                 : 
     102                 : 
     103                 :     nsDiskCacheBinding *        mBinding;       // not an owning reference
     104                 :     nsDiskCacheDevice *         mDevice;
     105                 :     nsDiskCacheOutputStream *   mOutStream;     // not an owning reference
     106                 :     PRInt32                     mInStreamCount;
     107                 :     nsCOMPtr<nsILocalFile>      mLocalFile;
     108                 :     PRFileDesc *                mFD;
     109                 : 
     110                 :     PRUint32                    mStreamPos;     // for Output Streams
     111                 :     PRUint32                    mStreamEnd;
     112                 :     PRUint32                    mBufPos;        // current mark in buffer
     113                 :     PRUint32                    mBufEnd;        // current end of data in buffer
     114                 :     PRUint32                    mBufSize;       // current end of buffer
     115                 :     bool                        mBufDirty;
     116                 :     char *                      mBuffer;
     117                 :     
     118                 : };
     119                 : 
     120                 : #endif // _nsDiskCacheStreams_h_

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